下面就是小编给大家整理的一句话学英语：As时间状语从句（共含9篇），希望您能喜欢！同时，但愿您也能像本文投稿人“猛男老可可”一样，积极向本站投稿分享好文章。
1.引导时间状语从句的引导词有：
①表示某个时刻发生的动作：when、while、as、once
②表示某个时刻之前发生的动作：before、until
③表示某个时刻之后发生的动作：after、since
2. when引导从句时，主从句的动作有先有后，也可以同时进行,从句的动作可以是持续性的，也可以是短暂的。
eg. When I go to the cinema, the movie had already started. （主先从后）（短暂性）
When I watched movie, I used to eat ice cream. (同时) （持续性）
When the movie ended, the people went back. （从先主后）
3. while侧重主从句动作的`对比，且从句的动词必须是持续性的。
eg. While we were chatting she was reading
4. as引导从句时侧重主从句动作同时或几乎同时进行，从句的动作可以是持续性的，也可以是短暂的。
eg. Sometimes I watch TV as I am having breakfast．
5. 关于when的固定搭配：
①…was/were doing…when…（正在做…突然）
②…was/were about to do…when…（刚要做…突然）
③…was/were on the point of doing…when…(刚要做…突然)
④…had just done…when….(刚一…就)
⑤Hardly/Scarcely had…done…when…(刚一…就)
As he rode through, he noticed shattered glass on the ground, bullet holes in the concrete walls.
【全句解释】
乘车穿行而过的时候，他注意到地面上满是被打烂的碎玻璃，还有混凝土墙壁上的斑斑弹孔。
【词语】
【注释】
①结构“As 从句, 主句”中的as表示：当……的时候;随着……。【注】1)本句中的“连词as”引导的是“时间状语从句”，he noticed...则是“主句”部分;2)关于“时间状语从句”的3点提示：1)句中的“时间状语从句”，既可以放在“主句”之前，也可以放在“主句”之后，二者含义相同;2)“主句的主语”常用“名词”，而“从句的主语”则常用“代词”来替代作“主句的主语”的那个“名词”(例见本句);3)英译中时，常先翻译“从句”，后翻译“主句”。
②“介词through”的含义：从……中间穿过。比如：从人群中间穿过;阳光透过玻璃照到室内等等。
③on the ground：在地面上。【注】“介词on”是指：面与面的接触。
④in the wall：在墙壁内。【注】“介词in”是指：嵌入墙壁内。
公众号：一句话学英语
引导的时间状语从句的主从复合句中，动作发生在先的用过去完成时，在后的`用过去时。表示前面的叙述所没有提到过的信息。它总是对所描述的事件予以引人注目的强调，意为“这时；突然”；当位于句末的分句具有引种用法时，大致有以下三种情况：
A. when 分句前面的分句使用过去进行时。如：
He was still smiling when the door opened and his wife came in. 他正笑着的时候，门突然开了，他妻子走了进来。
B. when 分句前面的分句使用 was （were） about to， was （were） on the point 等。如：
We were about to start when it began to rain. 我们刚要出发就开始下雨了。
C. when 分句之前的分句用过去完成时，其中 sb had hardly / scarcely /barely … when 已成为固定词组。如：
(1) We had hardly fallen asleep when the bell rang. 我们刚刚入睡，铃声就响了起来。
(2) He had scarcely arrived when he had to leave again. 他刚刚到达就又要离开了。
1.时间状语从句可由when，whenever， while，before，after，until，till，since，now that，once，as soon as等连词引起：
Let’s wait until(till)the rain stops.
等雨停了再说。
She
每当她感到寂寞时就来和我聊天。
As I talked, I gained some confidence.
我一面谈着一面增强了信心。
Now that I have
现在既然我回来了，我要帮助你们两人。
Once the train is moving, there is no way to stop it.
一旦火车开动了就没法址它停下来。
2.由every time，the moment等词引起的从句也可以用作状语
Every time I catch a cold, I have pain in my back.
每回伤风我的背就疼。
Stormy applause broke forth the moment she appeared on the stage.
她一在台上出现就响起暴风雨般的掌声。
He had impressed me that way the first time I met him.
我第一次碰到他时，他就给我这个印象。
Be sure to call on us next time you
下次进城你一定来找我们。
3.instantly，immediately，directly等词也可引起时间状语从句
The machine will start instantly you press the button.
你一按电钮机器就会开动。
I’ll give you an answer immediately I’ve finished reading your report
我看完你的报告立即给你答复。
Directly he uttered these words there was a dead silence.
他一说出这些话，大家立刻沉默下来。
Unit13 状语从句
一、考点聚焦%
1、时间状语从句
（1）as、when、while用法一览表。
类别 作 用 例 句
as as表示“当……的时候”，往往和when/ while通用，但它着重强调主句与从句的动作或事情同时或几乎同时发生。 She came up as I was cooking.(同时)
The runners started as the gun went off.(几乎同时)
when (at or during the time that )既可以表示在某一点的时候，又可表示在某一段时间内，主句与从句的动作或事情可以同时发生也可以先后发生。 It was raining when we arrived.(指时间点)
When we were at school, we went to the library every day.(在一段时间内)
while while意思是“当……的时候”或“在某一段时间里”。主句中的动作或事情在从句中的动作或事情的进展过程中发生，从句中的动词一般要用延续性动词。在when表示a period of time时，两者可以互换。 Please don’t talk so loud while others are working.
He fell asleep while/when reading. Strike while the iron is hot.(用as或when不可，这里的while意思是“趁……”)
（2）引导时间状语从句的连接词除上述外还有：
①till, not … until …, until, before, since
Don’t get off the bus until it has stopped.
He waited for his father until(till)it was twelve o’clock.
It will be five years before he returns from England.
②hardly / scarcely … when, no sooner … than, as soon as once
表示“一……就”
As soon as I have finished it , I’ll give yu a call.
Once you show any fear, he will attack you.
We had hardly got / Hardly had we got into the country when it
began to rain.
No sooner had he arrived / He had no sooner arrived than she started
③directly, immediately, the moment, the minute that… 一……就
He made for the door directly he heard the knock.
④each time, every time, by the time
Each time he came to my city, he would call on me.
注意：表示未来情况，主句用将来时，从句用现在时。
2、让步状语从句
（1）although与though可以引导让步状语从句，不能与but连用，但可以与yet连用。
Although they are poor,(yet)they are warm-hearted.
（2）even if或even though引导让步状语从句，表示“即使”，“纵然”，用来使人注意下文所强调内容的性质。
I’ll get there even if(though)I have to sell my house to get enough money to go by air.
（3）no matter后接上who、what、where、how等疑问词，也可以在这类疑问词后面加上ever构成whoever、whatever、wherever、however等。
Don’t trust him, no matter what / whatever he says.
Whoever breaks the law will be published.
No matter how hard the work is, you’d better try to do it well.
（4）as也可以引导让步状语从句。要用倒装。
Child as(though)he is, he knows a lot.
Much as I like it, I won’t buy.
Try as he would, he couldn’t lift the heavy box.
3、原因状语从句：because, for, as, since, now that
（1）表示不知道的原因时用because,即说话人认为听话人不知道，因此because从句是全句最重要的部分，通常它被置于主句之后。
You want to know why I’m leaving? I’m leaving because I’m full.
for虽然表示不知道的原因，但其语气较because要弱得多，是可说可不说的话，它只能置于主句之后，这时，for是并列连词。如果不是因果关系，而是对前面主句的内容加以解释或推断时，只能用for。如：It’s morning now, for the birds are singing.（很显然，鸟叫不可能是“现在已是早上”的原因。）
（2）表示已经知道的原因时用as或since,即某种原因在说话人看来已经很明显，或已为听话人所熟悉，因此它是句中不很重要的部分。since要比as正式一些，它们通常被置于语句之前，但有时却相反。
Seeing all of the children already seated, he said,“Since everyone is here, let’s start.”
(3)下列情况下只能使用because:
①在回答why的问句时；
②在用于强调句型时；
③被not所否定时。
4、地点状语从句：where, wherever
Make a mark wherever you have any questions.
We will go where the Party directs us.
5、目的状语从句：that, so that, in order that
注意：目的状语从句的谓语动词常与情态动词连用，否则可能是结果状语从句。不可置于句首。
6、结果状语从句：that, so that, so … that, such … that …
注意：so 形容词/副词 that从句；such 名词 that从句。
7、方式状语从句：as, as if(though)
I’ll do as I am told to.
It looks as if it is going to rain.
8、比较状语从句：than, as
9、条件状语从句：if, unless, so (as) long as, in case, once, a far as, on condition that.
注意if与unless的区别：不能用and连接两个unless从句，即不能有… unless …,and unless … 。但if … not and if … not却不受此限。
You won’t lose your weight unless you eat less and unless you exercise more.(×)
但可以说 … unless you eat less and exercise more.
10、注意状语从句中从句的省略现象
（1）连接词 过去分词
Don’t speak until spoken to.
Pressure can be incrased when needed.
Unless repaired, the washing machine is no use.
（2）连词 现在分词
Look out while crossing the street.
（3）连词 形容词/其他
常见的有it necessary、if possible、when necessary、if any等。
二、精典名题导解'
选择填空
1. I don’t think I’ll need any money but I’ll bring some ____________.
(NMET )
A.as last B.in case C.once again D.in time
解析：答案为B。句意为“带些钱以防万一”，只能选择in case。引导的条件状语从句，后面省略了I should need it。
2. The WTO can’t live up to its name _________ it doesn’t include a country that is home to one fifth of mankind.（NMET 2000）
A.as long as B.while C.if D.even though
解析：答案为C。本题考查状语从句的用法。句意为“假如世贸组织不包括占世界人口五分之一的中国的话，那它就名不副实”。as long as语气过于强烈，while和even though不符合句意。
3、Someone called me up in the middle of the night, but they hung up_________I could answer the phone.(NMET 2000)
A.as B.since C.before D.until
解析：答案为C。题意为：半夜里有人打来电话，我没来得及就挂了。but暗示在接话前就挂了。
一、教学目标
要求学生掌握状语从句的种类, 在句中的句法功能以及状语从句与其他从句的区别。
二、教学重点及难点
状语从句的引导词, where引导的地点状语从句, 时态一致性问题。
三、教学方法
1．状语从句在句中起副词作用, 所以又叫副词从句。
状语分为：时间、地点、条件、原因、让步、比较、方式、目的、结果, 既然有这么多种状语, 也就有这么多种状语从句, 请想出相应的例子来：
2．下面咱们分类讨论一下状语从句。先看时间状语从句的引导词。引导时间状语从句的有：when, while, as, before, after, since, till, until, as soon as, no sooner…than…, hardly…when…。
这里有几个要注意的问题。首先：while引导的从句中谓语动词必须是能够延续的动词。如：While I was sitting there, he told me an interesting story．其次, since引导的从句用过去时, 主句用现在完成时。第三, as soon as, no sooner…than, hardly…when引导的从句中谓语动词要用 had done。
3．“as”是什么意思？
4．时间状语从句还有几个特殊的引导词。
如：every time, each time, the moment
A．Every time I saw him, I would like to listen to his songs.
B．I came to the house the moment he was about to leave.
5．Yes, we can say it is an adverbial clause introduced by when or while. Some parts are omitted.“When looked into…”refers to“When I looked…”“While listening to…”refers to“While I was listening to…”
6．Now let's talk about the adverbial of place, “where, wherever”can introduce the clause. For instance. Where there is water, there are living things.
Wherever they went, they were warmly wel
他们所到之处都受到了热烈的欢迎。
7．这道题只能选择A, where引导地点状语从句, 意思为：在有座山的地方两条河相遇。至于B项at the place可以做主句的状语, 但它与后半部分毫无关系。如果在place后加上where就可以了, 也就是at the place where, 这样where引导的为定语从句。
8．介词 which代替where只有是定语从句情况下才可以, 判断是否是定语从句, 要看从句前是否有先行词, 有先行词的是定语从句，这时可以用介词 which代替where。如果没有先行词的话，则不能用介词 which代替，再看几个句子：
A．Shall we have a party where we met last Sunday?
B．Have you been to the island where there are many monkeys?
C．Please put all these books where they used to be.
D．We will go where we are needed most.
请你判断一下哪个是定语从句, 哪个是地点状语从句。
9．引导条件状语从句的词有哪些？
10．除去这两个词外, 还有：
so（as）long as（只要……）provided…providing…
supposing…on condition that…
如：
So long as we work hard, we are sure to make much progress.
Supposing we can't get him informed in advance, what should we do?
要是我们不能提前通知他，那该怎么办呢？
I'll
只要我完全恢复，就来。
11．So much for the adverbial clause of condition. Now let's
12．for引导的句子不是原因状语从句，它连接的两句前后是并列关系, 不是主从关系, for所陈述的原因是间接的，常常是推测性的。如：
The electric current must have been turned off, for the light went out.
for不能放在句首, 只能放在句中。
请翻译下列各句：
A．他想必是从这条路过去的, 因为这里有脚印。
B．是因为他病了, 他才没来办公室吗？
13．你回答得很正确。since常用以述说推断的理由, 常放在句首。如：
Since his method doesn't work, let's try yours.
既然他的方法不行, 我们就试试你的吧。
as放在句首或句中, 口语里有时把as省掉。
Let's take a rest. I am tired = As I am tired, let's take a rest.
由于我累了, 咱们休息吧！
14．Now let's do some exercises.
Please fill in the blanks with because, since, as or for.
A．The light went out, ____ the electric current was turned off.
B． ____ everyone is here, let's begin our meeting.
C．I cannot go, ____ I am busy.
15．The adverbial clause of concession
让步状语从句
请说出引导让步状语从句的引导词。
16．even if与even though有区别：even if一般引导的是把握不大或假设的事情, even though引出的是事实。
如：Even if we achieve great success in our work, we should not be proud.
即使我们在工作中取得了巨大成绩，也不应该自满。
Even though he was late, he was not criticized by the teacher．虽然他晚了, 可他并没有受到老师的批评。
17．比较状语从句要记住几个句型：
A．…as…. as
B．…er than…
C．the more… the more….
比较状语从句, 既然它叫从句, that, as 之后就要有主谓成份, 只不过有时谓语动作与前文所述一致, 所以省略了, 但是主语需用主格, 虽然口语中偶尔有用宾格的情况。如：
He is taller than me.
18．目的状语从句和结果状语从句都由so that… 引导, 它们有什么区别吗？
19．引导结果状语从句的还有such…that…；引导目的状语从句的还有in order that…, 甚至有时so that（不分开）也可以引导结果状语从句。
如：He went early, so that he got a good seat.
值得注意的是 so that 前有一个“, ”。
20．Now let's discuss the last adverbial clause．方式状语从句, 引导方式状语从句的有as。如：
Let's study as Lenin did.
咱们像列宁那样学习。
as可以引导方式状语从句, 让步状语从句, 原因状语从句, 时间状语从句，比较状语从句, 还可引导定语从句, 请分别举出一例。
Students
1．
A．When we came we found they had left.
B．Where there is a will, there is a way.
C．If it is fine tomorrow, we'll go for a picnic.
D．Since everyone is here, let's begin our class.
E．Though it was very late, the workers were continuing their work.
F．The horse is not so weighty as the elephant.
G．The students reviewed the lessons as the teacher told them to.
H．Let's get up early so that we can arrive at the airport on time.
I．They worked there so carefully that they didn't notice I was passing by.
2．till和until的用法也不一般, 它有两种句型：A…. until（till）主句中用延续性动词, 意思是：（动作）一直到……
B…. not until… 主句中用非延续性动词, 意思是：直到……才……
例如：
The play went on until the candles went out.
剧一直演到蜡烛熄灭。
We didn't begin our meeting until the chairman came.
我们一直等到主席来才开会。
3．as的意思为：一边……一边……
如：
We talked as we walked.
我们边走边谈。
4．Let me say the Chinese meaning of these two sentences.
A．每当我看到他, 我就想听他唱歌。
B．他正要离开, 我到家了。
5．Sometimes I meet with such sentences as:
A．When looked into the room, I found no one.
B．While listening to the radio, I ate my breakfast.
Are these sentences
6．我在地点状语从句和where定语从句问题上有些模糊。比如：
The two rivers meet ____ there is a mount.
A．where
B．at the place
C．the place at which
D．at which
A、B、C、D选择哪一个呢？
选A为地点状语从句, 由where引导, 选B, at the place在主句中作地点状语, 选D at which代替where, 所以我想都有道理。
7．C项是否缺介词at, 如果缺少这个介词, 后半部分与前半部分脱离关系。D项which指代不清。
8．A是地点状语从句, party不是where 从句的先行词, 因为party与where毫无关系, where不能用at which代替。B中where从句是定语从句，island是where从句的先行词，where可以用on which代替，on the island there are many monkeys 意思很明确。C句中where从句是地点状语从句，books与where没有关系，不能用介词 which代替where。D中where从句是地点状语从句，where 之前根本没有名词。
9．if和 unless。如：
If it is fine tomorrow, we'll go camping.
Unless he writes me back, I'll not write him again.
10．
这些词不能引导虚拟语气的条件从句, 在这些条件状语从句引导词中只有if可以引导虚拟语气的条件状语从句。
11．I think“because, since, as, now that”can.
Here are some sentences:
A．Because it was getting dark, we hurried.
B．As I knew he was ill, I didn't call.
C．Since his method doesn't work, let's try yours.
老师：for引导的句子是原因状语从句吗？
12．
A．He must have passed this way, for here are the footprints.
B．Was it because he was ill that he didn't
那么, as, since和because有什么区别呢？是不是要从它们表示原因的强弱程度上加以考虑？强弱程度是不是这样？because最强since次之, as最弱。
13．看来, as语气很弱, 甚至可以省掉, since表示前后推理关系, 与now that 意思相似。如：
Now that you are well again, you can go on with your work.
既然你已经恢复了, 你可以继续你的工作了。
because语气最强烈。在回答why问题或在强调结构中必须用because。
14．
A．because, 断电是灯灭的直接原因。
B．Since, 既然人都来了, 咱们就开会吧。前后是推理关系。
C．as, 我不能去, 由于太忙。
15．引导词有though, although, even though, even if, no matter what（who, whom, where, when, which）, whatever, whoever, as…even if和even though 有区别吗？
16．我想, whether…or 引导的也是让步状语从句。如：Whether he
无论他是否来, 今晚我们将开个晚会。
17．as, than… 引导的都是从句, 原来我以为它们是介词, 后边跟名词或代词, 但现在我明白了, 它们后面跟的是省略了的句子。如：
He runs faster than I（do）.
比较状语从句是否要注意比较的两个事物或人应当对等, 否则就没有比较的意义了？
18．so that 引导目的状语从句与结果状语从句形式是不同的。引导目的状语从句so that不能分开, 而引导结果状语从句so与 that之间要插入形容词或副词。
如：We got up early so that we could arrive at the town on time．（目的状语）
We got up so early that we arrived at the town on time．（结果状语）
19．so that… 引导的究竟是目的状语从句还是结果状语从句要看“，”，有逗号的是结果状语从句, 没逗号的是目的状语从句。另外，结果状语从句中谓语动词一般是一个事实。如：He worked hard, so that he made much progress．而目的状语从句的谓语动词有can, may之类的词。
20．
A．Please fly the kite as the teacher does．（方式状语从句）
B．Child as he is, he knows a lot. （让步状语从句）
C．He didn't
D．They talked and laughed as they ate their dinner．（时间状语从句）
E．This park is as large as that one．（比较状语从句）
F．As is known to everyone, the earth is bigger than the moon．（定语从句）
四、精选题
单项选择：
1．---- Is your camera like Bill's and Ann's? [ ]
---- No, but it's almost the same as ____ .
A．her B．yours
C．them D．their
2．---- Would you like to
---- I'd like to, ____ I'm too busy.
A．and B．so
C．as D．but
3．Mother was worried because little Alice was ill, especially ____ father was away in France. [ ]
A．as B．that
C．during D．if
4．It is generally considered unwise to give a child ____ he or she wants. [ ]
A．howeverB．whatever
C．whichever D．whenever
5．After the war, a new school building was put up ____ there had once been a theatre. [ ]
A．that B．where
C．which D．when
6． ____ , Mother will wait for him to have dinner together. [ ]
A．However late is he
B．However he is late
C．However is he late
D．However late he is
7．It was about 600 years ago ____ the first clock with a face and an hour hand was made. [ ]
A．that B．until
C．before D．when
8．Why do you want a new job ____ you've got such a good one already? [ ]
A．that B．where
C．which D．when
9．---- I'm going to the post office. [ ]
---- you're there, can you get me some stamps?
A．As B．While
C．BecauseD．If
10． ____ you've got a chance, you might as well make full use of it. [ ]
A．Now that B．After
C．AlthoughD．As soon as
11．You should make it a rule to leave things ____ you can find them again. [ ]
A．when B．where
C．then D．there
12．We'll have to finish the job ____ . [ ]
A．long it takes however
B．it takes however long
C．long however it takes
D．however long it takes
13．The museum will have to close ____ the government agrees to give extra money. [ ]
A．until B．if
C．when D．unless
14． ____ you
A．Neither; nor
B．Both; and
C．Either; or
D．Whether; or
15．The two boys look so much alike ____ no one can tell them apart. [ ]
A．and B．so
C．that D．so that
16．We had not gone far ____ we saw a great crowd of people. [ ]
A．before B．after
C．as soon as D．while
17．You can have these magazines ____ I finish reading them. [ ]
A．so that B．because
C．the moment D．unless
18． ____ the paper, it seems to write itself. [ ]
A．Starting B．After starting
C．Having started once D．Once I start
19．---- Is your engineering project ready? [ ]
---- No, and ____ today, I won't pass the course.
A．unless I get finishB．if I got finishing
C．unless I get finished D．if I'm not finished
20． ____ the day went on, the weather got worse. [ ]
A．With B．Since
C．While D．As
填空：
1．He won't believe it ____ he sees it with his own eyes.
2．Trees must be planted ____ there is a lot of sunlight.
3．____ Swede was not good at English, he could understand what you were saying.
4．Do what you think is right, ____ they say.
5．Go back ____ you
6．How long is it ____ I saw you last?
7．You can go out, ____ you promise to be back before eleven.
8．The professor told the students to do ____ he did.
9．No one can be more fit for his office ____ he is.
10． ____ everyone has understood this one, let's change another.
答案：
单项选择：
1．B 比较的是 camera, yours = your camera
2．D 转折关系
3．A 在……期间
4．B 要什么给什么
5．B where引导地点状语从句
6．D 无论多晚
7．A 强调结构
8．D 当你已经得到了一份好工作（的时候）
9．B 时间状语从句, 在那儿期间
10．A 既然你已经得到了机会
11．B where 引导地点状语从句
12．D 无论它花费多长时间
13．D 除非政府同意多给资金
14．D whether…or… 引导让步状语从句
15．C that 引导结果状语从句
16．A 刚走不远就看到了一大群人
17．C the moment 引导时间状语从句
18．D 一旦开始……就似乎……
19．C 除非搞完否则就……
20．D 随着时间推移, 天气变坏
填空：
1．until
2．where 阳光充裕的地方
3．Though 前后为让步关系
4．whatever 无论他们说什么, 都要做你认为是正确的事。
5．where 回到你来的地方, where 引导地点状语从句
6．since 时间状语从句
7．as long as 只要你保证十一点以前回来……
8．as as 引导方式状语从句
9．than 比较状语从句
10．Since 前后为推理关系, 既然大家都懂这个, 那么咱们换一个。
状语从句在句中作状语，修饰主句中的动词、形容词或副词等。状语从句放在主句之前时，常用逗号分开；放在主句之后，一般不用逗号。状语从句按其意义和作用可分为时间、原因、条件、、让步、地点、目的、结果、方式、比较等九种。
1．时间状语从句
时间状语从句通常由when, while, as, before, after, (ever) since, till, until, as soon as等从属连词引导。
When he was skating round the lake, he suddenly fell.
I haven’t heard from him since he left school.
As soon as he appeared on the stage, the audience began to cheer.
注意：时间状语从句中用一般现在时表示将来意义。例如：
I will go on with the work when I
I will send you email as soon as I reach New York.
1）when, while, as引导时间状语从句时的异同
when引导的时间状语从句中的谓语动词既可以是延续性动词，也可以是短暂性动词；从句的动作可以和主句的动作同时发生，也可以先于主句的动作发生，此时相当于after。当when从句谓语动词是延续性动词时，可与while互换。
I often missed my home a lot when I was abroad.. ( =while )
When they came home, I was cooking dinner. (不能用while)
When the film ended, people rushed out of the hall. ( =after )
when从句置于主句后面，同时从句中谓语动词又是短暂性动词时，常表示“此时突然……”。
I was walking along the street when I caught sight of a tailor’s shop.
He was enjoying his dinner when a loud noise came on the door.
while引导的动作必须是持续性的，强调主句和从句动作的同时发生，有时侧重主句和从句动作的对比。
He took a bath while I was preparing dinner.
as常可与when, while通用，但它较强调主句和从句动作的同时发生，常译作“边……边”也可用来说明两种正在发展和变化的情况，此时常译作“随着”。
He sang happily as he walked along the path.
The day gets longer and longer as summer
2）until, till引导的时间状语从句
主句谓语动词为延续性动词时，主句和从句都用肯定句式，意为“一直到”，表示主句动作一直延续到until/till从句表示的时间才终止；主句谓语动词为短暂性动词时，主句用否定式，从句用肯定式，意思是“一直到才”，表示主句动作到until/till从句表示的时间才开始。
He worked until/till it was dark.
He didn’t work until/till it was dark.
until和till意义相同，通常可换用，但在强调结构、倒装句或句首，一般用until。例如：
I didn’t know about it until/till he told me.
It was not until he told me that I knew about it.
Not until he told me did I know about it.
3）since引导的时间状语从句和before引导的时间状语从句
since从句中的动词不同，其起算时间也不同。since 瞬间动词过去时，从该动作发生时起算；since 延续性动词过去时，从该动作结束时起算。试比较：
He has worked very hard since he entered the factory.
(enter为瞬间性动词，该句意为“从他入厂以来，他工作一直非常努力。”)
We haven’t seen each other since I worked in the factory.
(work为延续性动词，该句意为“从我不在工厂以来，我们没见过面。”可说成
We haven’t seen each other since I stopped working in the factory.）
since常用于It’s some time since sb. did sth.结构。试比较：
It’s two years since he joined the army. （他参军有两年了。）
It’s two years since he was a soldier. （他退役有两年了）
before有时可译为“还没……就”。如：
He had measured me before I could say a word. （我还没来得及说话他就给我量好了尺寸。）
I hadn’t waited long before he came. （我还没等多久他就来了。）
I slipped out before the lecture started. （还没等讲座开始我就溜了出去。）
before也可用于it结构，与since结构比较相似，注意它们所用时态的区别，其结构通常是
It will be some time before sb. does sth. 或It was some time before sb. did sth.. 可表示将来或过去两个概念。常译作“……才……”。例如：
He is leaving for Australia and it will be three years before he
(他要去澳大利亚了,三年后才会回来。)
(Duing the war he joined the army and it was three years before he came back.
（战争期间他参了军，三年后才回来了。）
4）as soon as等意为“一……就”的时间状语从句的几种不同表达
as soon as表示“一……就”，在表述已发生的动作时，hardly…when, no sooner…than也可表示同样的意思，但主句谓语动词要用过去完成时，从句用过去时，还可转换成倒装结构。
As soon as he saw the policeman, he ran away.
= He had hardly seen the policeman when he ran away.
= Hardly had he seen the policeman when he ran away.
= He had no sooner seen the policeman than he ran away.
= No sooner had he seen the policeman than he ran away.
immediately, directly, instantly, the moment, the minute, the instant,也可引导时间状语从句，相当于as soon as的意思，用法也与as soon as基本相同。上述句子可转换成：
He ran away immediately/directly/instantly he saw the policeman.
He ran away the moment/the minute/the instant he saw the policeman.
5）the moment, the minute, the instant, the day, the year, the first time, last time, each/every time, next time, by the time等少数表示时间概念的短语也可引导时间状语从句。例如：
I recognized her the minute I saw her.
Her son was born the day Hongkong returned to its motherland.
He left Europe the year World War Ⅱ broke out.
He was attracted by the beauty of the city the first time he went there.
Last time I saw her, she was writing a book.
Don’t refer to the dictionary each/every time you
I will go to the seaside next time I go to Dalian.
He had finished learning advanced mathematics by the time he was 14.
2．原因状语从句
1）原因状语从句通常由because, since, as引导。because引导的从句可以放在主句前，也可放在主句后面，表示直接的原因或理由，着重点在从句。回答why问句、用于强调结构都用because。如：
He had to do a part-time job after work because he needed money for his marriage.
---Why didn’t he
---Because he had something important to do.
It was because he lost it that he found it more valuable than ever.
since和as引导的原因从句更多见于句首，表示明显的、已知的事实，语气比because弱，分别可译作“既然”、“由于”，着重点在主句。
Since you have to stay at home, why don’t you do some shopping on
As the weather is fine, let’s go fishing.
for也可引导表示原因的句子，但它是个并列连词，通常表示一种推测的原因或附加的说明，语气最弱，一般不放在句首，前面常有逗号分隔。
It must have rained last night, for the ground is wet.
2）now that, seeing that, considering that等也可以引导表示原因的从句, 语气相当于since，常译作“既然”，口语中that可省去。例如：
Now (that) my watch has been sold, what’s the use of the watch chain?
Seeing (that) you’re already at the door, I suppose I must invite you inside.
3．条件状语从句
条件句可分为真实条件句和非真实条件句，非真实条件句在虚拟语气中有详细表述，这里只讨论真实条件句。引导条件句常用的有if, unless, as(so) long as, in case等，when, once, suppose (that) 或supposing (that)，on condition that 也可引导表示条件的从句。条件状语从句和时间状语从句一样，表示将来要用一般现在时。例如：
The bell is rung if there is a fire.
We won’t let you in unless you show your pass.
You may use my bike as/so long as you return it before Friday.
In case anything important happens, please call me up.
Turn off the switch when anything goes wrong.
Once you taste the noodles, you’ll never forget their delicious flavour.
Suppose/Supposing (that) you fail again this time, what will you do?
He agreed to lend him the money on condition that he paid back three times more money in three months’ time.
4．让步状语从句
1）通常由though, although, even/though引导，主句中不能用but，但可用yet。如：
He didn’t light the fire though/although it was cold.
Although/though he is quite old, (yet) he still tries to learn more.
I’ll try to finish the work myself even if/though it takes me days.
3） whatever, whoever, whichever, whenever, wherever, however 引导状语从句时，分别相当于no matter what/who/which/when/where/how引导的从句，意为“无论……”。例如：
Whatever/No matter what he said, no one believed him.
Whoever/No matter who breaks the law, he will be punished.
Whichever/No matter which job you take, you should try to do well in it.
Whenever/No matter when I need his help, he
Wherever/No matter where you go, never forget your motherland.
However/No matter how busy he was, he would watch TV sports news every night.
注意whatever, whoever, whichever又可引导名词性从句，注意区别。可参阅本章第一节。
3）as引导让步状语从句要倒装，其结构通常是“noun/adj/adv as 主语 谓语( 其它成分)，主句”，可转换成though/although从句。
Child as he is, he knows a lot. （注意：名词前不用冠词）
=Although/Though he is a child, he knows a lot.
Difficult as the task was, they managed to finish it in time.
=Although/Though the task was difficult, they managed to finish it in time.
Much as I like it, I will not buy it.
=Although/Though I like it much, I will not buy it.
偶尔也可见用动词提前的让步状语从句。例如：
Try as he may, he can hardly do better than she.
=Although/Though he may try, he can hardly do better than she.
4）whether…or也可引导让步状语从句，相当于“no matter whether…or”。
Whether you
=No matter whether you
5．地点状语从句
1）地点状语从句常由where和wherever引导，通常可置于主句之前或之后。。
I found the books where I left them.
Make a mark where you have any questions.
We should go where(ver) we are most needed.
Where there is a will, there is a way.
Where there is water, there is life.
2）where引导的状语从句和where引导的定语从句常可转换，判断它属于哪类从句的关键是看where前面有没有被修饰的、表示地点的先行词。试比较：
Stand where you are! （状语从句）
Stand at the place where you are! （定语从句）
Bamboo grows best where it’s wet and rainy. （状语从句）
Bamboo grows best in places where it’s wet and rainy. （定语从句）
6．目的状语从句
1）目的状语从句通常由 (so) that, in order that引导,在口语或非正式文体中，有时也会用that或so引导。in order that 引导的目的从句可以放在主句后面，也可放在主句前面，而so that引导的从句通常放在主句后面。目的状语从句中的谓语常含有may(might), can(could), should, will等情态动词。例如：
He always takes a seat in the first row so that/in order that he can hear better.
（也可说成He always takes a seat in the first row so/that he can hear better.但用的较少。）
=In order that he can hear better, he always taked a seat in the first row.
The actress wore ordinary clothes in order that/so that she might not be recognized easily.
=In order that she might not be recognized easily, the actress wore ordinary clothes.
2）in case, for fear that, lest 等也可以引导目的状语从句，表示 “以防…、以免…” 。如：
He left early in case he should miss the train.
Take your raincoat in case it rains/should rain.
Mother hid the sweets and chocolates lest/for fear that her son should see them.
7．结果状语从句
1）结果状语从句常由so that, so… that, such… that等引导，放在主句之后，so…that与such…that句型在一定条件下可转换。例如：
The lift was out of order, so that we had to walk to the 18th floor.
He was so angry that he left the room without saying a word.
He made such an excellent speech that everyone admired him.
=He made so excellent a speech that everyone admired him.
在口语中也可用that引导结果从句。例如：
What have I said that he should be so angry with me?
2）so that引导结果状语从句和目的状语从句的辨别
so that从句之前有逗号的常为结果状语从句，因表示某一行为带来的结果，从句中的时态常为过去式；so that从句中有may(might), can(could), should, will等情态动词的通常是目的状语从句。例如：
I wrote as clearly as possible so that I might get high marks. （目的）
I wrote as clearly as possible, so that I got high marks. （结果）
He went to the lecture early so that he could get a good seat. （目的）
He went to the lecture early, so that he got a good seat. （结果）
8．方式状语从句
1）方式状语从句常由 (just) as, as if/though引导，表示动作的方式。
Do exactly as the doctor says.
He walked slowly as if/though he had hurt his leg.
注：在非正式文体中有时会用like代替as引导方式从句。
2）as if/though 引导的状语从句，若描述非事实情况，常用虚拟语气，若描述的是实际情况，用陈述语气。例如：
She treats the orphan as if/though he were her own child.
（他是孤儿，当然就不是她的亲生孩子，故用虚拟语气。）
It looks as if/though it’s going to rain.
（本句用的是陈述语气，说明天真象是要下雨了。）
3）the way 也可用来引导方式状语从句。例如：
Mary smiled the way (in which/that) her mother did at her age.
（马丽跟她母亲在她那个年纪时笑起来一个样。）
9．比较状语从句
1）比较状语从句常由as … as, not so (as) … as, than引导。比较从句部分常为省略句。例如：
His brother is as handsome as he (is)/him. （非正式英语中可用宾格him）
He swims faster than any other student in his class (does).
2）通常把the more…the more…结构也归为比较从句，意为“越……越”。如：
The harder you work, the greater progress you’ll make.
The less she worred, the better she worked.
典型例题分析
1．If we work with a strong will, we can over
A what B how C however D whatever
解析：本题考查-ever类词引导让步状语从句的用法。根据句意“无论困难有多大”，排除答案A/B，whatever=no matter what，后面跟名词或直接跟从句，however=no matter how，后跟形容词或副词，再接主语和谓语，故答案为C。
2．Mother was worried because Alice was ill, especially ____ Father was away in France. (’94)
A as B that Cduring D if
解析：根据前半句“妈妈因为Alice病了很着急”，后面有表示递进意义的词especially，顺着句意推测，应该是“尤其是因为父亲远在法国”，表示原因，故答案为A。注意during是介词，不能引导从句。
3．Why do you want a new job ____ you’ve got such a good one already? (’98)
A that B where C which D when
解析：本题考查when引导原因状语从句的特殊用法。本句意为“既然你已经有了一个好工作，为什么还要找份新工作呢？”A/B/C都没有表示原因的意思，不符合句意，故答案为D。
4．---What was the party like?
---Wonderful! It’s years ____ I enjoyed myself so much. (’93)
A after B before C when D since
解析：本题考查学生对”“It’s some time since sb. did sth.”结构的掌握，因一A/C般不用于此类句型，因此干扰最强的是before，而before常用句型为“It will be some time before sb. does sth.”，根据句子的意思及句中所用的时态，D为最佳选择。
5．We won’t give up ____ we should fail ten times. (’93)
A even if B since C whether D until
解析：解本题的关键是弄清空格前后两部分的关系，最佳的连接关系应该是“即使失败十次，我们也不放弃。” 符合句意的只有答案A。
6．John shut everybody out of the kitchen ____he could prepare his grand surprise for the party.
A which B when C so that D as if
解析：分析句子意思，发现“John把每个人都关在厨房外”的目的就是为了“能够准备他那别出心裁的晚会”，从句中的could是目的状语从句的标志，因此答案为能够引导目的状语从句的so that ( C )。
7．After the war, a new school building was put up ____ there had once been a theatre. (’97)
A that B where C which D when
解析：分析题干和选项，不难发现句子要表达的意思，“战后，在过去的剧院旧址上，新建了一所学校。”从空格到句末应该是一个表示地点的状语从句，故答案为B。
8．It is generally considered unwise to give a child ____ he or she wants. (97’)
A however B whatever C whichever D whenever
解析：本题句中从空格处到句末为一宾语从句，作give的直接宾语，因此排除答案A和D，而whichever引导名词性从句时， 所指代的名词应是已知范围内的人或物，通常在上文已经提到过或者在whichever后有该名词或of结构。Whatever在引导名词性从句时意为“anything that”，用于不定范围的情况，本句意为“一般认为孩子要什么就给什么是不明智的”，不确指什么东西，因此答案为B。
摘自《新编名师导学》
苏州市苏苑中学 许凤编写
一、在英语状语从句学习中，有一种从句是由：原级：as…as(和……一样)，not so(as)…as …(和不一样);比较级：more…than(更);最高级：The most…in/of， the 形容词 est…of/in。常用引导词：as(同级比较)，than(不同程度的比较);特殊引导词：the more … the more … ; no … more than;not A so much as B引导的，由这类词引导的状语从句叫做比较状语从句，主要运用于形容词和副词的原级、比较级及最高级的句子之中。
二、1、as/so 原级 as;它的意思是， 和......一样,(其中 as/so 是副词,意思是“同样地”,后一个 as 是连词),如：
My hometown is as/so beautiful as Hangzhou
我的家乡和杭州一样美。
2、no 比较级 than ，它的意思是，最多和......一样，只不过，如：
I have no more than two dollars left in my pocket.
我口袋里只剩下两元钱了.(有钱少的含义)
3、not more than,不多于,如：
I have not more than two dollars left in my pocket.
我口袋里顶多还有两元钱.(没有钱多钱少的含义)
4、no less than 不亚于,至少和...一样,如：
He has got no less presents than I did last time.
他收到的礼品不亚于我上次收到的.(有收到多的含义)
5、not less than 不少于,如：
He has got not less presents than I did last time.
他收到的礼品不少于我上次收到的.(不包含多或少的含义)
6、比较级 than,比...优上,如：
Our class is bigger than yours.
我们班的规模比你们的大.
7、the 比较级 the 比较级,越如何就越如何,如：
The more we can do for you,the happier we will be.
为你们做得越多我们就越感到高兴.
8、less 原级 than,不如,比...较差,如：
This kind of food is less expensive than that one.这种食品不如那一种贵.
9、not so 原级 as,不如,不及,如：
The film today is not so interesting than the one yesterday.
今天的电影不如昨天的那个有意思.
10、than 比,as/so ...as 和...一样,the more...the more 越...越...
三、比较状语从句从某种角度上说，它也是一种方式状语从句，它通常可和以下关联词来引导as(或so)...as, than, according as, in proportion as等。
1. He woke up as suddenly as he had fallen asleep.
他醒来得和入睡一样突然。(第一个as是副词)
2. I have never seen so much rain as fell that February.
我从未见过像那个二月那么多雨。(否定结构常用so…as, 也可用as... as)
3. Man developed earlier than people think.
人类的出现比人们所想的要早。
4. He moves more slowly than his sister does.
他行动起来比他妹妹慢。
5. The youth of today are better off than we used to be.
今天的年轻人比我们过去的境况要好。
6. You may go or stay, according as you decide.
是去是留由你自己决定。
7. You will be praised or blamed according as your work is good or bad.
你受表扬还是责备得看你的工作好坏决定。
8. Men are happy in proportion as they are virtuous.
人之幸福与德行成正比。
9. Some people are happy in proportion as they are noticed.
有些人越受到注意就越高兴。
10. This book is the most interesting of the three.
这本书是三本中最有趣的。
11. This road is the busiest street in our city.
这条路是我们城市最繁忙的街道。
12. Food is to men what oil is to machine.
食物之于人,犹如油之于机器。
作者：赫广春
一、时间状语从句
用来表示主句动作发生时间的状语从句是时间状语从句，通常由连词when, before ，after等引导。
1. when意为“当……的时候”，用来表示主句动作和从句动作同时发生，或从句动作发生在主句动作之前。例如：
We wanted to go to play football when it began to rain.
2. before 意为“在……之前”，通常表示主句的动作发生在从句动作之前。例如：
Don't say anything before you look at the picture.
3. after 意为“在……之后”， 通常表示主句动作发生在从句动作之后。例如：
I left the office after I rang him up last Sunday.
二、条件状语从句
条件状语从句通常由连词if引导，意为“如果；假如”。例如：
If you fall into the water and can't swim, they may
三、时态的运用
在时间状语从句和条件状语从句中，主句和从句之间的时态要保持一致，具体情况如下：
1. 当主句和从句的谓语动词都是单纯陈述过去的事情时，主句和从句都可用一般过去时。例如：
When my father was ten years old, the World Cup was in Sweden.
2. 当主句和从句所表达的动作基本同时发生或表示客观事实时，主句和从句都可以用一般现在时。例如：
When they walk, Cody walks.
3. 当主句的谓语动词是want, wish,hope等时，从句通常用一般现在时。例如：
Do you want to be a policeman when you grow up?
4. 当主句是一般将来时、一般现在时(包括祈使句和含有情态动词can, may, must等)，上述两种情况中状语从句必须用一般现在时。例如：
What are you going to do after you leave school?
Be careful when you cross the road.
You must see the doctor if you are ill.
★ 状语从句的时态
★ 状语从句分类及常用连词
★ 结果状语从句的用法
★ 中考英语语法详解十四：状语从句
★ 语法复习六：状语从句 (人教版高三英语下册教学论文)
★ 英语中哪些成分可以构成状语
★ 高一英语定语从句知识点
★ 引语转换时时间状语的变化知识
★ 珍惜时间的励志话
★ 节日英语作文话
