时间状语从句讲练
一．概述
概念：在复合句中，由时间连接词引导的表示时间的状语从句叫做时间状语从句。(在复合句中，要注意主句和从句的时态大多都要保持一致。）
一般来说，时间状语从句常由连词when, before, after, as soon as或until等引导。在使用时，从句一般不用一般将来时态。若主句为一般将来时态或是含有将来的意味时，时间状语从句常用一般现在时态来代替将来，即“主将从现”。如：
I will go to the cinema as soon as I finish my homework. 我一完成作业就去电影院。
When I grow up, I will join the army. 当我毕业了，我就要去参军。
二．常用连接词举例
1. when连接的时间状语从句
when相当于汉语的“当……时候”。如：
When the weather is fine, many families go out for a walk.天气好时，很多家庭都出去散步。
When I got home, I found mother cooking for me.我到家时，发现妈妈在为我做饭。
I always go to see the doctor when I do not feel well.我感到不舒服时总要去看医生。
Please let me know when you have trouble.有因难时请告诉我。
2. before/after连接的时间状语从句
before表示“在……之前”，after表示“在……这后”。如：
He telephoned that he couldn’t come before the concert began.
他打电话来说音乐会开始前来不了了。
Mother always prepares supper before I come back from school.
妈妈总是在我放学回家前把晚饭准备好。
I will go out to play basketball with you after I finish my homework.
我做完功课后就和你一起出去打篮球。
3. as soon as连接的时间状语从句
as soon as表示“一……就……”，强调动作紧密相连。如：
We start to sing as soon as it is 12o’clock. 一到１２点，大家就开始唱起来。
We began t work as soon as we got there.我们一到那儿，就马上开始工作。
4. until连接的时间状语从句
until表示一个动作一直持续到某一时刻，即“直到……”。如：
He waited until all the people left.他一直等到所有的人都走了。
I didn't go to bed until Mum came back.直到妈妈回家后我才上床睡觉。
5. while连接的时间状语从句
while连接时间状语时，表示主句的行为在从句行为过程之中发生。由于while从句表示一个持续的行为，所以从句中要用持续性动词或状态动词，并且持续性动词常用进行时态。如：while they are waiting for the New Year, they listen to music, sing songs and have fun.
在等待新年到来的一段时间里，他们听音乐、唱歌、娱乐。（听音乐行为是在等待过程之中进行的）Do not make any noise while I am recording.
我录音时不要吵闹。（在我录音的过程中你不要吵闹）
People wave flags while the parade went down the street.
游行队伍经过街道时人们挥舞旗帜。
（人们挥舞旗帜的行为是在游行队伍从街道经过的过程中进行的）
三．几组引导词的辨析
1. till, until和not…until
(1) until/till引导时间状语从句用于肯定句时，主句的动词是延续性动词,表示动作或状态一直持续
到until/till所表示的时间,意为“某动作一直延续到某时间点才停止”。如：
We waited until he came.
直到他来，我才买了这本书。
(2) 用于否定句时，主句谓语动词是非延续性动词，从句为肯定，意为“某动作直到某时间才开始”。
如：
I didn’t buy this book until he came. 直到他回来我才买了这本书。
(3) till不可以置于句首，而until可以。如：
Until you told me I had no idea of it. 知道你告诉我我才知道这件事。
(4) not…until句型中的倒装和强调说法：
Not until he came did I buy this book. 直到他回来我才买了这本书
It was not until he came that I bought this book. 直到他回来我才买了这本书
2. when，while和as
(1) when引导的从句的谓语动词可以是延续性的动词，又可以是瞬时动词。并且when有时表示“就在那
时”。例如：
When she came in, I stopped eating.她进来时，我停止吃饭。(瞬时动词)
When I lived in the countryside, I used to carry some water for him.
当我住在农村时，我常常为他担水。（延续性的动词）
We were about to leave when he came in.我们就要离开，就在那时他进来了。
(2) while引导的从句的谓语动作必须是延续性的，并强调主句和从句的动作同时发生（或者相对应）.
并且while有时还可以表示对比。例如：
While my wife was reading the newspaper, I was watching TV. (was reading是延续性的动
词，was reading和was watching同时发生)
I like playing football while you like playing basketball.
我喜欢踢足球，而你喜欢打篮球。（对比）
(3) As表示“一边……一边”，as引导的动作是延续性的动作，一般用于主句和从句动作同时发生；
as也可以强调“一先一后。例如：
We always sing as we walk.我们总是边走边唱。（as表示“一边……一边”）
As we was going out, it began to snow.
当我们出门时，开始下雪了。（as强调句中两个动作紧接着先后发生，而不强调开始下雪的特定时
间）
3. before和after
由before和after引导的时间状语从句。注意before引导的从句不再用否定式的谓语，并且当before 引导的从句位于主句之后，有时译成“就，才”。还要注意主句和从句之间的时间关系。当主句用将来时，从句总是用现在时；如果before引导的主句谓语用的是过去完成时，则从句动词多用一般过去时，这样以便体现动作发生的先后。After表示主句动作发生在从句动作之后。主句和从句的动作的时间关系正好与before引导的从句相反。例如：
It will be four days before they come back. 他们要过四天才能回来。
Einstein almost knocked me down before he saw me. 爱因斯坦几乎把我撞倒才看到我。
My father had left for Canada just before the letter arrived.
我父亲恰好在信到之前去加拿大了。
They had not been married four months before they were divorced.
他们结婚还不到四个月就离婚了。
After you think it over, please let me know what you decide.
你仔细考虑过以后，告诉我你是怎样决定的。
After we had finished the work, we went home.
完成工作之后，我们回家了。（从句用过去完成时，主句用一般过去时）
4. till和until
由till或until引导的时间状语从句。till和until一般情况下两者可以互换，但是在强调句型中多用until。并且要注意的是：如果主句中的谓语动词是瞬时动词时，必须用否定形式；如果主句中的谓语动词是延续性动词时，用肯定或否定形式都可以，但表达的意思不同。till不可以用在句首，而until可以放在句首。例如：
I didn't go to bed until（till）my father came back. 直到我父亲回来我才上床睡觉。
It was not until the meeting was over that he began to teach me English.
直到散会之后他才开始教我英语。
I worked until he came back. 我工作到他回来为止。
I didn't work until he came back. 他回来我这才开始工作。
Please wait until I arrived. 在我到达之前请等我。
四．扩展：
1. 一些词，如the moment, the minute, the instant, 等也可引导一个时间状语从句，相当于as
soon as的意思。
He jumped off the couch the moment the telephone rang.
电话一响，他就从沙发上跳起来了。
2. immediately, directly, instantly, 也可引导时间状语
They phoned me immediately they reached home. 我们刚到家电话就响了。
3. hardly…when, scarcely…when, no sooner…than 引导时间状语，相当于as soon as 的意思。
如果hardly或no sooner或scarcely置于句首，句子必须用部分倒装结构。主句使用过去完成时，
从句使用一般过去时。
Hardly had I got home when it began to rain. 我一到家就下雨了。
4．一些含有time的名词短语，如every time, each time, next time, the first time等，以及the day, the year, the morning等，也可引导一个时间状语从句。
The day he returned home, his father was already dead. 他到家那天，父亲已经去世了。
Next time you come, please bring your composition. 你下次来的时候，请把你的作文带来。
初二英语时间状语从句讲解与练习
when, while 和 as 引导时间状语从句的用法
这三个词的意思很简单，都有“当……时候”的意思。但学生经常会问三个词的区别在哪儿，特别是在做选择题的时候。别说是学生，就我个人而言，做这样的选择题要保证百分之百的正确也是不可能的。现根据大量的实例和个人的思考，做一点小结，供大家参考。
一、when 的用法
如果只从现象来看，when 从句用的最多的是一般过去时，而主句的时态没有限制,根据具体情况而定。
1. When he was a child he was always trying out new ideas.
他小时候就常常试验一些新的设想。
2. When she came into my room, I was just reading a book. 她走进我房间时，我正在看书。
3. Were you writing when the teacher came in? 老师进来的时候，你在写信吗？
4. Sorry, I was out when you called me. 对不起，你打电话来的时候我出去了。
5. He was on the point of leaving when someone knocked at the door.
他正要走，这时有人敲门。
6. I thought of it just when you opened your mouth. 就在你要说话的时候，我也想到了。
7. I had hardly[scarcely] closed my eyes when someone knocked at the door.
我刚一闭上眼，就有人在敲门了。
根据以上的例句，我们可以总结出一点：when 从句的A事件，相当于另一个事件B发生的时间点。也就是说，when 从句的重点不在动作本身发生的状态，而只是把它作为一个时间点，所以when 多数情况下用的是一般过去时，则不用正在进行时。因为如果用正在进行时，它表示的就是一段时间而不是一个时间点了。根据这一点，有的文章补充说：when 从句的动词大多是瞬时动词。这种说法也可以参照。
实际上，when 从句也可以有其它的时态，但几乎也不用进行时，因为它也只是作为一个时间参照点。例如：
1. When I got to the airport, the guests had left. 当我赶到飞机场时，客人们已经离开了。
2. When he had finished his homework, he took a short rest.
当他完成作业后，他休息了一会儿。
3. Why do you want a new job when you have got such a good one already?
你已经找到如此好的工作，为何还想再找新的？
4. You shall borrow the book when I have finished reading it.
在我读完这本书后，你可以借阅。
5. When the manager comes here for a visit next week, I’ll talk with him about this.
下周，经理来这参观时，我会和他谈谈此事。
二、while 的用法
相比于when 来说，while 从句的侧重点就不一样了。while 从句的侧重点在于描述动作正在发生的状态，它的意思是：当while 事件正在发生的时候，另一件事如何如何。所以，while 从句一般用的是正在进行时。而另一件事的状态没有硬性的要求，根据具体情况而定。例如：
1. While my wife was reading the newspaper, I was watching TV.
当妻子正在看报纸的时候，我正在看电视。
2. While Jim was mending his bike, Lin Tao came to see him.
正当吉姆修自行车时，林涛来看他。
3. While they were talking, the bell rang. 正在他们谈话的时候，上课铃响了。
4. You can’t do your homework while you’re watching TV.
你不能一边看电视一边做家庭作业。
5. While John was sitting biting his nails, I was working out a plan to get us home.
约翰坐在那里咬指甲时，我正在制定一个回家的计划。
从时间的角度来看，while 表示的是一段时间，是一个过程。这是while 的侧重点。因此，如果含有“一段时间”的含义的时候，就可以用while。
6. Strike while the iron is hot. 趁热打铁。
这句话中，是说趁着铁是热的这段时间，赶紧打铁。如果换成when 意思就变了，相当于说铁只热了一下，打一下，然后铁就冷了。这显然不符合文意。
再例：
—I'm going to the post office.
—While you're there, can you get me some stamps?
三、as 的用法
as 从句表示的也是一件事情正在发生，另一件事也正在进行当中。但与while 从句不同的是，as 从句用的一般不用正在进行时，而只是一般过去时。as 从句一般可以翻译成“边……边……”。例如：
1. As my mother sang those old songs, tears ran down her cheeks.
当我妈妈唱起那些老歌时，眼泪顺着她的脸颊流了下来。
2. The students took notes as they listened. 学生们边听课边做笔记。
3. As we talked on, he got more and more excited. 我们继续往下谈的时候，他越来越兴奋。
4. The little girls sang as they went. 小姑娘们一边走，一边唱。
5. Just as he caught the ball, there was a tearing sound.
当他抓住球的时候，有一种撕裂的声音。
as 表达的事件，往往只是主句动作发生的背景或条件时，as 只是一个次要的时间说明，不像while 从句有强调while 动作本身的意思。因此，as 常常翻译成“随着……”之意。
例如：
1. As the time went on，the weather got worse. 随着时间的推移，气候更加糟糕。
2. The atmosphere gets thinner and thinner as the height increases.
随着高度的增加，大气越来越稀薄。
3. As years go by，China is getting stronger and richer.
随着时间一年一年过去，中国变得越来越富强了。
少数情况下，如果强调动作正在发生，as 从句也可以用正在进行时。这只能算是特例了。
1. The sad mother sat on the roadside, shouting as she was crying.
伤心的妈妈坐在路边，边哭边叫喊。
2. As we were going out, it began to snow. 正当我们出门时，雪开始下起来。
3. He came in as I was going to bed. 我正要上床睡觉，他进来了。
四、when, while, as 的互换
如果从句动作和主句动作同时发生，并且从句动作为延续性动词时，when，while，as 可以互换使用。这种情况下，它们的细微区别恐怕连英、美人自己也说不清了。
1. When /While /As we were dancing, a stranger came in.
当我们跳舞时，一位陌生人走了进来。[dance 为延续性动词]
2. When /While /As she was making a phone call, I was writing a letter.
当她在打电话时，我正在写信。[make为延续性动词]
3. While/When/ As I was walking down the street, I noticed a police car in front of the
bank.
我顺着马路往前走时，发现银行门前停着一辆警车。
五、比较while, when, as
1）as, when 引导短暂性动作的动词。
例如：Just as / Just when / When I stopped my car, a man came up to me.
我刹车后，有一个人向我走来。
2）当从句的动作发生于主句动作之前，只能用when 引导这个从句，不可用as 或while。
例如：When you have finished your work, you may have a rest.
干完活后，你可以休息一下。
3）从句表示“随时间推移”连词能用as，不用when 或while。
例如：As the day went on, the weather got worse.日子一天天过去，天气越变越坏。
2）比较until和till
此两个连词意义相同。肯定形式表示的意思是“做某事直至某时”，动词必须是延续性的。否定形式表达的意思是“直至某时才做某事”。动词为延续性或非延续性都可以。正确使用这两个连词的关键之一就在于判断句中的动词该用肯定式还是否定式。
肯定句：I slept until midnight. 我一直睡到半夜时醒了。
Wait till I call you. 等着我叫你。
（在肯定句中可用before代替。例如：Let's get in the wheat before the sun sets.）
否定句：She didn't arrive until 6 o'clock. 她直到6点才到。
Don't get off the bus until it has stopped. 公共汽车停稳后再下车。
I didn't manage to do it until you had explained how. 直到你教我后，我才会做。
区别：1）until可用于句首，而till通常不用于句首。
例如：Until you told me, I had heard nothing of what happened.
直到你告诉我以前，出了什么事我一点也不知道。
3）until when 疑问句中，until要放在句首。例如：
---Until when are you staying?你呆到什么时候？
--- Until next Monday.呆到下周一。
注意：否定句可用另外两种句式表示。
4）Not until…在句首，主句用倒装。
例如：Not until the early years of the 19th century did man know what heat is.
直到19 世纪初，人类才知道热为何物。
Not until I began to work did I realize how much time I had wasted.
直到工作，才认识到我已蹉跎了许多岁月。
5）It is not until…that….
例如：It was not until I began to work that I realized how much time I had wasted.
6）表示“一……就……”的结构
hardly/scarcely…when/before, no sooner…than和as soon as都可以表示“一……就……”的
意思。
例如：
I had hardly / scarcely got home when it began to rain. 刚回家，就下起雨来了。
I had no sooner got home than it began to rain.
As soon as I got home, it began to rain.
注意：如果hardly, scarcely 或no sooner置于句首，句子必须用倒装结构。
例如：
Hardly / Scarcely had I got home when it began to rain.
No sooner had I got home than it began to rain.
六、练习：在下列各句的空格中填入适当的连词
1．_________ he comes tomorrow, I shall ask where he has been.
2．_________ he was speaking, everybody listened carefully.
3．I saw her just _________ she was getting off the train.
4．Have a good look at that man _________ you pass him.
5．It was already eight o'clock _________ we got there.
6. I was about to go out _________ a visitor came.
7．We'll go to the country at the beginning of June, ______ the summer harvest will start.
8. He learned to speak German _________ he was in Berlin.
9. Henry is in charge of the office ________ Mr. Smith is away.
10. I listen to the recorder _________ I have time.
11. He had learned Chinese _________ he came to China.
12. _________ the work was done, we sat down to sum up experience.
13. I haven't seen him _________ he moved to the other side of the town.
14. I waited ________ he came back.
15. It was not ________ he took off his eyeglasses that I recognized him.
16. She likes everything to be in place ________ she starts to work.
17. The thieves ran away _________ they caught sight of the police.
18. They decided to go back home _________ their money ran out.
19. We played outside till sunset, _________ it began to rain。
20. __________ I get to the airport, I will phone you to pick me up.
21. They were about to leave ______ it began to rain.
22. He always stay in bed ______ lunch time.
23. I like playing tennis _________ my younger sister prefers watching ball games.
24. _________ I understand your viewpoint, I don’t agree with you.
25. _______ she grew older, she became more responsible.
Key:
1. When
2. While / When
3. as
4. when/as
5. when
6. when
7. when 8. while9. while10. whenever11. before 12. After
13. since 14. till/until15. until 16. before17. as soon as 18. before
19. when20. As soon as21.when 22. until 23. while24. While
25. As
时间状语从句 用句子表达一件事情或一个行为发生的时间，这个句子就叫时间状语从句。时间状语从句根据其所表示的时间不同，所使用的连词也不同。下面我们一起来看一下几个常见的时间状语从句： 1．when引导的从句：表示主句的动作和从句的动作同时发生，或从句的动作发生在主句动作之前。 例如：I was going out when a visitor came. (动词动作同时发生。)我正要出门，有客人来访。 I shall tell her the good news when she comes.她来时，我将告诉她这个好消息。 小试牛刀：I found mother cooking for me. I got home.(when)_______________________________________ He was listening to the radio when I home. (get) 2．while 引导的从句：表示“当……过程中”，强调某一段时间内主句和从句中谓语动词所表示的动作在同一时期发生。由于while从句表示一个持续的行为，所以从句中要用持续性动词，并且持续性动词常用进行时态。 例如：Keep an eye on my little sister while I am away.我不在时，请照看一下我的小妹妹。 While we were watching TV, Jim came in. 我们看电视的时候，Jim进来了。 小试牛刀：It started to rain. We were playing football.(while)_______________________________________ Lucy was cleaning the room Lily was listening to music. 3．as引导的时间状语从句：表示“当……的时候；一边……一边……；随着……”，其从句的主语与主句的主语往往是同一人或物。 例如：She sang as she worked. 她一边工作一边唱歌。=She was singing as she was working. I saw him as he was getting off the bus. 正当他下公共汽车时, 我看见了他。 小试牛刀： we walked, we talked. You will grow wiser you grow older. 4．before引导的从句：一般表示主句的动作发生在从句动作之前。 例如：I didn’t know any English before I came here. 我到这儿来之前，一点英语都不懂。 例如：I had written my report before my father came back. 小试牛刀：He bought the ticket he went to see the film. 5．after引导的从句：表示主句的动作发生在从句动作之后。 例如：After he locked the door, he left. 他锁上门后，就走了。 After he had finished his work, he played a game of chess with his friend. 他做完工作后，和朋友下了一盘棋。 小试牛刀：I will go out to play basketball with you. I finish my homework.(after) _______________________ _ He left the classroom he had finished his homework the other day. 6．since引导的从句：表示“自从……以来”，从句中的动词一般表示动作的起点，用过去时。主句中的动词表示动作延续的情况，一般用现在完成时。如果主句中的动词表示的不是延续的动作而是表示目前的状态，可用一般现在时。 例如：Since he met this good friend, he has made great progress in his studies. 自从遇见了这个好朋友，他已在学习上取得了巨大的进步。 例如：It is twenty years since she joined the Party. 她入党二十年了。（主句中的动词表示的是状态，用现在时。） 小试牛刀：it is five years since we last time.（meet） Mr green has taught in that school since he (come) to China three years ago.
一、时间状语从句中的省略 When (she was) very young, she began to learn to play the piano. 她很小时，就开始学习弹钢琴。 While (I was) at college, I began to know him, a strange but able student. 我在上大学时就开始认识他，一个奇怪但有能力的学生。 When arriving, send me a telegram. (When you arrive, send me a telegram.) 到达之后，来个电报。 Before leaving, turn off all the lights. (Before you leave, turn off all the lights.) 走之前，请关闭所有的灯。 Don’t come in until (you are) asked to. 不叫你请你不要进来。 Whenever (it is )possible, you should come and help. 不管什么时候只要有可能就来帮忙。 You should let us know the result as soon as(it is) possible. 你应尽快让我们知道结果。 注：as在引导时间状语从句时，没有这种省略现象。我们不可说As walking, she found a nice shining thing on the ground. 二、地点状语从句中的省略 地点状语从句的省略常用下列结构：where(ver) possible, where(ver) necessary, Lay these books where possible you can find them easily. 把这些书放在你可能容易找到的地方。 Put in articles wherever necessary in the following passages. 在下列文章中需要的地方填入冠词。 三、条件状语从句中的省略 常用的句型是：if necessary, if possible, if true, if anyone等。如： Send the goods now if (they are) ready. 货物如果准备好了，请送过来。 He will come if (he is) asked. 如果叫他来，他就来。 If (it is) necessary, ring me at home. 如果有必要，朝我家里打电话。 Come along with me if (it is) possible. 如果有可能和我一起去吧。 If (it is) true, this will casue us a lot of trouble. 如果是真的，这会给我们带来很多麻烦。 There are few people nowadays, if (there are) any, who remember him. 很少有人能记起他。 You should stay where you are, unless (you are) asked to leave. 你应呆在你现在的地方不动，除非叫你动。 四、让步状语从句中的省略 He is a good man, though sometimes (he is) rather dull. 他真是个好人，尽管有时有点无聊。 Even if (I am ) invited to, I won’t go to such a bad lecture. 即使邀我去，我都不想听如此坏的报告。 五、比较状语从句中的省略 She can play the piano just as wonderfully as you (do). 她钢琴弹的我你弹的一样好。 She has finished the work earlier than (it has been ) expected.她完成得比预期要早。
时间状语从句练习 时间状从句练习 ( ) 1. While she ____ TV in the sitting room, the bell _____. A. watches, rings B. is watching, rang C. was watching, rang( ) 2. I ____ you the news as soon as you ____ Xi’an. A. will tell, reach B. tell, will arrive in C. will tell, will get to( ) 3. Li Ping was tired yesterday, so he ___ his mother came back from work in the afternoon. A. slept until B. didn’t sleep until C. went to bet until( ) 4. I don’t know if Mr. Wang ___ .If he_, please let me know. A.will come, will come B. comes, will come C. will come, comes( ) 5. We’ll go for a picnic if it ____ this Friday A. won’t rain B. isn’t raining C. doesn’t rain( ) 6. Wang Lin will come to see you ____ he reaches this city. A. before B. while C. as soon as( ) 7. --- Will you come to the dinner party? --- I won’t come unless Jenny ____. A. will invited B. is invited C. invited( ) 8. If you ____ carefully, you ____ the report well. A. will listen, will understand B. will listen, understand C. listen, will understand
广州 初一英语Unit 8语法 【精讲点拨】 when引导的时间状语从句 一. 概念：在复合句中，由时间连接词引导的状语从句叫做时间状语从句。 二．1.．从句动作在主句动作前发生，只用when。 When he had finished his homework，he took a short rest．（finished先发生）当他完成作业后，他休息了一会儿。 When I got to the airport，the guests had left．（got to后发生）当我赶到飞机场时，客人们已经离开了。 2．在将来时从句中，常用when，且从句须用一般现在时代替将来时。 You shall borrow the book when I have finished reading it．在我读完这本书后，你可以借阅。 When the manager comes here for a visit next week，Ill talk with him about this．下周，经理来这参观时，我会和他谈谈此事。 三．种类： 1.由when, while, as引导的时间状语从句。 （1）when引导的从句的谓语动词可以是延续性的动词，又可以是瞬时动词。动作既可和主句的动作同时发生又可在主句的动作之前或之后发生，并且when有时表示“就在那时”。 When she came in, I stopped eating. 她进来时，我停止吃饭。(瞬时动词) When I lived in the countryside, I used to carry some water for him.当我住在农村时，我常常为他担水。（延续性的动词） （2）while强调主句的动作与从句的动作同时持续地进行，用于这一用法时while引导的时间状语从句和主句中的谓语动词必须是延续性动词，或者主句的动作发生在从句动作的进行过程中，主句中的谓语动词通常是非延续性动词，并且while有时还可以表示对比。 While my wife was reading the newspaper, I was watching TV. I met her while I was at school. I like playing football while you like playing basketball. （3）as引导时间状语从句时表示“当……时，一边……一边……”，侧重表示两个动作同时发生(包括一个主语同时进行两个动作)，或者一种动作随着另一种动作的变化而变化。 As the time went on，the weather got worse．（as表示“随着……”之意）
（adverbial clause of time） 概念：在复合句中，由时间连接词引导的状语从句叫做时间状语从句。(在复合句中，要注意主句和从句的时态大多都要保持一致。） 1.由when, while, as，after,before,since,untill,引导的时间状语从句。例如： When you think you know nothing, then you begin to know something.当你以为自己一无所知的时候，你就是在开始知道一些事物了。 When truth is buried under the ground it grows, it chokes, it gathers such an explosive force that on the day it bursts out , it blows up everything with it.当真理被埋在地下的时候，它在生长，它感到压抑，它蓄存着这么一种爆炸性力量，一旦冒出，它就会炸破一切！ Strike while the iron is hot. 趁热打铁。 You can feel the air moving as your hand pushes through it. 当你的手在空气中挥动的时候，你就能感觉到空气在流动。 Our headmaster laughed as she spoke.我们的校长边谈边笑。 主要时态：主过从过；主将从现；主句为一般现在时，从句不受影响。 编辑本段when, while和as的区别 when引导的从句的谓语动词可以是延续性的动词，又可以是瞬时动词。并且when 有时表示“就在那时”。例如： When she came in, I stopped eating.她进来时，我停止吃饭。(瞬时动词) When I lived in the countryside, I used to carry some water for him. 当我住在农村时，我常常为他担水。（延续性的动词） We were about to leave when he came in.我们就要离开，就在那时他进来了。 While引导的从句的谓语动作必须是延续性的，并强调主句和从句的动作同时发生（或者相对应）。并且while有时还可以表示对比。例如： While my wife was reading the newspaper, I was watching TV. (was reading 是延续性的动词，was reading和was watching同时发生) I like playing football while you like playing basketball.我喜欢踢足球，而你喜欢打篮球。（对比） As表示“一边……一边”，as引导的动作是延续性的动作，一般用于主句和从句动作同时发生；as也可以强调“一先一后。例如： We always sing as we walk.我们总是边走边唱。（as表示“一边……一边”）As we was going out, it began to snow.当我们出门时，开始下雪了。（as 强调句中两个动作紧接着先后发生，而不强调开始下雪的特定时间） 2.由before和after引导的时间状语从句。注意before引导的从句不再用否定式的谓语，并且当before引导的从句位于主句之后，有时译成“就，才”。还要注意主句和从句之间的时间关系。当主句用将来时，从句总是用现在时；如果before 引导的主句谓语用的是过去完成时，则从句动词多用一般过去时，这样以便体现动作发生的先后。After表示主句动作发生在从句动作之后。主句和
状语从句 在复合句中作状语的从句叫状语从句。状语从句有时间、地点、原因、目的、结果、条件、方式、比较、让步等种类。 一、时间状语从句 引导时间状语从句的连接词有: when, as, while, after, before, since, ever since, as soon as, once, till, until, whenever, no sooner…than, hardly/scarcely...when, the moment/minute/instant/second, every time, each time, any time, the first time, next time, last time, all the time, by the time, directly, immediately, instantly等。 1.表示“一···就···”的句型 1) as soon as/once As soon as he arrives, I'll call you.他一到，我就给你打电话。（as soon as 侧重时间或动作先后衔接紧，而once侧重条件，表示“一旦...”） 2) on doing sth/on one's + n.作时间状语 On arriving at the station, the thief was arrested. 一到达车站，这个小偷就被逮捕了。 On his arrival in Paris, he was recognized as a noble and thrown into prison. 他一到达巴黎，就被认出是一个贵族，并被投入监狱。 3) no sooner ...than , hardly/scarcely...when 它们表“一…就”。结构中的否定词放在句首时，主句要倒装。（主句都用过去完成时，从句用一般过去时。） No sooner had he reached home than it began to rain. 他刚到家，天就开始下雨了。 Hardly/Scarcely had I entered the room when the phone rang. 我一进屋，电话就响了。 当no sooner, hardly, scarcely不放在句首时，主句不倒装，如： I had no sooner reached the bus stop than the bus started. 我刚到车站，车就开走了。 I had scarcely（hardly）entered the room when the phone rang. 4）the moment, the instant, the minute, the second The moment I saw him, I recognized him. 我一看见他，就认出了他。 We'll leave the minute you are ready. 你一准备好，我们就出发。 5)有些副词如：instantly, immediately, directly可用作连词，后接从句。 I left immediately the clock struck 5. 我刚走，钟就敲了五点。 2. when, while, as引导时间状语从句 1) when的用法 ①when既可指时间点，也可指时间段（即：从句动词可以是短暂的也可是延续的）；主从句动作可同时也可先后发生。
时间状语从句常由以下连接词引导：when（当……时），as（一边……一边；当…时），while（在……期间），after（在……之后），before（在……之前），as soon as（一……就），since（自从），till(until)（直到……，直到……才），whenever（任何时候），the moment（一……就），no sooner than（一……就），hardly…when… （一……就）等。由以上连接词（或词组）连接的主从复合句中，主句和从句的动作，有的是同时发生，有的是先后发生。因此，要特别注意根据连接词所代表的时间不同，主句和从句的谓语要使用相应的时态。这是掌握时间状语从句的关键。 1. when 和whenever 引导的从句：从句的动作和主句的动作可以同时发生，也可以先于主句的动作发生。例如： When we reached home, it was already dark. 我们到家的时候天已经黑了。 When my cousin came yesterday, I was playing volleyball. 昨天我表哥来时，我正在打排球。 When it rains, I go to school by bus.下雨的时候，我坐车去学校。 I shall tell her the good news when she comes. 她来时，我将告诉她这个好消息。（主从句都表示将来发生的动作，但要注意从句中要用一般现在时，表示将来。） Come to see us whenever you can.你什么时候有空，就过来看看我们。 2. while 和as 引导的从句：while表示“当…过程中”，强调某一段时间主句和从句的动作在同时发生。as表示“当…时”或 “一边…一边”，主句和从句的动作同时发生。例如： Work while you work; play while you play. 该工作的时候就工作，该玩的时候就玩。 While he is reading, he always makes notes. 他经常一面看书，一面做笔记。 She sings as she goes along.她边走边唱。 You will grow wiser as you grow older. 随着年龄的增长，你会更加聪明起来。 3. before 和after 引导的从句：前者一般表示主句的动作发生在从句动作之前。后者表示主句的动作发生在从句动作之后。 例如： I didn’t know any English before I came here. 我来这儿之前，一点英语都不懂。 I had written my report before my mother came back.
状语从句 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、地点、条件、让步、目的、结果、方式、比较等9种。 1.时间状语从句 时间状语从句表示主句动作发生的时间，主要由when，while，as ; before, after; till (until); once, by the time, as soon as, no sooner ... than和hardly ... when及名词词组the moment等引导。 1) when“在……的时候”; while “在……期间”; as “正当……的时候” when意为“在……的时候”，强调“特定时间”。 When spring came, he felt like a trip. When he was eating his breakfast, he heard the doorbell ring. 说明：连词when在状语从句中还有如下几种含义： ①表示突然发生的事，含义为“（正在……时）忽然”。 I was just coming along to see you when I ran into Wilson. I had been working a couple of months when I had a letter from Jane. ②表示过早发生某事，意为“（还没……）就”。此含义有时可用before代替。 I hadn’t been reading for half an hour when I heard steps outside. 我刚读了不到半个小时就听到外面有脚步声。 I had been there little more than a week when I set to work in earnest. ③表示“在……的情况下”，常可译为“虽然”，“既然”，“如果”。 She refuses help when (although) she has many friends. Why do you walk when (since) you have a car? How can I help them to understand when (if) they won’t liste n to me. ④后接虚拟结构，含义为“本可以，应该……”。 He stopped trying when he might have succeeded next time. They were playing when they could have been working. while意为“在……期间”，从句用持续性动词，表时间的一段，而不是一点。 While he was eating his breakfast, he heard the doorbell ring. We must strike while the iron is hot. 说明：连词while在状语从句中还有如下几种含义： ①意为“然而，但是”，表示前后对照，说明两种情况相反 Tom is very outgoing, while Jane is shy and quiet. Some people waste food while others haven’t enough.
时间状语从句和省略 一、时间状语从句 1. 某些易用错的连词。 (1) 连词immediately / directly / instantly和词组the moment, the minute意为“一……就……”，相当于as soon as。如： The thief ran away the moment / directly he saw the policeman. [注意] a. immediately / directly / instantly也是副词，在句中作状语。如： I didn’t immediately realize how serious the situation was. b. 介词on / upon +名词/ V-ing也表示“一……就……”。如： Yao Ming was surrounded by the media on his arrival at the airport. On seeing the painting by Van Gogh, I fell in love with it at once. (2) 词组the first time, the last time, each time, every time以及by the time，都引导时间状语从句。如： The first time I spoke English before foreigners, I was a student of high school. Every time I meet the policeman at that crossroads, he will give me a big smile. [注意] for the first time是介词短语，意为“第一次……”，常用来作状语。 They had a face-to-face talk for the first time. (3) when, while和as引导时间状语从句的区别： when引导时间状语从句时，可与短暂性动词连用，也可与延续性动词连用；而 while只能与延续性动词连用；as表示两个动作的同时性，意为“一边……，一边……”。如： When I entered the classroom, all the students looked up at me curiously. Could you look after Robert while I am preparing the report?
[编辑本段] 简介 （adverbial clause of time） 概念：在复合句中，由时间连接词引导的状语从句叫做时间状语从句。(在复合句中，要注意主句和从句的时态大多都要保持一致。） 时间状语从句 1.由when, while, as，after,before,since,untill,引导的时间状语从句。例如： When you think you know nothing, then you begin to know something. 当你以为自己一无所知的时候，你就是在开始知道一些事物了。 When truth is buried under the ground it grows, it chokes, it gathers su ch an explosive force that on the day it bursts out , it blows up everything with it.当真理被埋在地下的时候，它在生长，它感到压抑，它蓄存着这么一种爆炸性力量，一旦冒出，它就会炸破一切！ Strike while the iron is hot. 趁热打铁。 You can feel the air moving as your hand pushes through it. 当你的手在空气中挥动的时候，你就能感觉到空气在流动。 Our headmaster laughed as she spoke.我们的校长边谈边笑。 主要时态：主过从过；主将从现；主句为一般现在时，从句不受影响。 [编辑本段] 区别 when, while和as的区别：when引导的从句的谓语动词可以是延续性的动词，又可以是瞬时动词。并且when有时表示“就在那时”。例如：
动词不定式的时态和语态（曹霞）
10. With a lot of difficult problems ____, the newly-elected president is having a hard time.(2002年上海春季高考) A. settled B. settling C. to settle D. being settled 11. She will tell us why she feels so strongly that each of us has a role ___in making the earth a better place to live. (2003上海春季高考) A. to have played B. to play C. to be played D. to be playing 12. In order to gain a bigger share in the international market, many state run companies are trying ___their products more competitive. ( 2002上海春季高考) A. to make B. making C. to have made D. having made 13. I've heard him ______ about you often. A. speak B. speaks C. spoke D. speaking 14. I went to see him, _______ him out. A. finding B. find C. only to find D. to finding 16. ---Will the Smiths go abroad this summer? ---No, they finally decided _______. A. to B. not going C. not to D. not to be going 17. He pretended _______nothing about it. A. know B. to know C. knowing D. knew 18. They would not allow him _______ across the enemy line. A. to risk going B. risking to going C. for risk to go D. risk going 19. There are so many kinds of tape-recorders on sale that I can't make up my mind _______ to buy. A. what B. which C. how D. where 20.Charles Babbage is generally considered _______ the first computer. A. to invent B. inventing C. to have invented D. having invented 21.The missing boys were last seen _______ near the river. A. playing B. to be playing C. play D. to play 21. The patient was warned _______ oily food after the operation. A. to eat not B. eating not C. not to eat D. not eating 22. I regret _______ you that we are unable to offer you employment. A. informing B. having informed C. to inform D. to informing
考点27 时间状语从句 高考频度：★★★★★ 考向一 when/while/as引导的定语从句 一、when引导的时间状语从句 1. when引导的时间状语从句，其动词既可以是延续性动作的动词，也可以是瞬间性动作的动词，而且可以表示主句的动作和从句的动作同时发生，或者从句的动作发生在主句的动作之前。 When you apply for a job, you must present your credentials. 当你申请工作时，你必须递交你的有关证件。（同时） When the stude nts heard the teacher’s footsteps, they all atopped talking.当学生们听到老师的脚步声时，他们都停止了讲话。（从句动作发生在前） 2. when还可表示just then（正在那时，突然）的意思，此时其所引导的从句只放在主句之后。 be about to do ... when ... 正要去做某事，突然…… be doing ... when ... 正在做某事，突然…… be on the point of doing ... when ... 正在做某事，突然…… We were about to start when it began to rain. 我们正要动身，突然天下起雨来。 The game had hardly/scarcely/barely begun when it started raining. 比赛刚刚开始就下起雨来。 二、while引导的时间状语从句 while表示＂在某一段时间里＂或＂在……期间＂，其所引导的从句的动作是延续性的，并侧重表示和主句的动作同时发生。 When the teacher paraphrased the text in English, the students listened attentively and took notes. 当老师用英语解释课文时，学生们聚精会神地听并做着笔记。
1.由when, while, as引导的时间状语从句。 When you think you know nothing, then you begin to know something.当你以为自己一无所知的时候，你就是在开始知道一些事物了。When truth is buried under the ground it grows, it chokes, it gathers such an explosive force that on the day it bu rsts out , it blows up everything with it.当真理被埋在地下的时候，它在生长，它感到压抑，它蓄存着这么一种爆炸性力量，一旦冒出，它就会炸破一切！ Strike while the iron is hot. 趁热打铁。 Will you watch my clothes while I have a swim? 我游泳的时候，请你照看一下我的衣服。 You can feel the air moving as your hand pushes through it . 当你的手在空气中挥动的时候，你就能感觉到空气在流动。 Our headmaster laughed as she spoke.我们的校长边谈边笑。 when, while和as的区别 1. when引导的从句的谓语动词可以是延续性的动词，又可以是瞬时动词。并且when有时表示“就在那时”。 例如： When she came in, I stopped eating.她进来时，我在吃饭。(瞬时动词) When I lived in the countryside, I used to carry some wate r for him.当的住在农村时，我常常为他担水。（延续性的动词） We were about to leave when he came in.我们就要离开，就在那时他进来了。 2. While引导的从句的谓语动作必须是延续性的，并强调主句和从句的动作同时发生（或者相对应）。并且while有时还可以表示对比。例如： While my wife was reading the newspaper, I was watching TV. (was reading是延续性的动词，was reading和was watching同时发生) I like playing football while you like playing basketball.我喜欢踢足球，而你喜欢打篮球。（对比） 3. As表示“一边……一边”，as引导的动作是延续性的动作，一般用于主句和从句动作同时发生；as也可以强调“一先一后。例如： We always sing as we walk.我们总是边走边唱。（as表示“一边……一边”） As we was going out, it began to snow.当我们出门时，开始下雪了。（as强调句中两个动作紧接着先后发生，而不强调开始下雪的特定时间） as when while的辨析 as when while都表示主、从句动作同时发生，三者差异如下：
一篇彻底搞懂时间状语从句 在中考英语中，状语从句是初中英语中很重要的语法项目，是学英语学习的重点更是教与学的难点。状语从句根据它表示的意思可分为时、原因、条件、目的、结果、让步、比较等。 狀语一般由副词、介词短语、分词和分词短语、不定式或相当于副词的词或短语来担当。其位置一般放在句末，但也可放在句首或句中。 副词是一种用来修饰动词,形容词,副词或全句的词,说明时间,地点,程度,方式等概念。 1.副词一般在句子中做状语. He speaks English very well. 他英语说得非常好.（中的very是程度副词，用来修饰well。very well是修饰speak 的程度状语） He is playing under the tree. 他在树下玩儿.（under the tree是地点状语.） 2. 不定式在句子中可以作目的状语。 I come specially to see you. 我专门来看你. 3.介词短语 Ten years ago, She began to live in Dalian. The boy was praised for his bravery. 4.从句作状语 When she was 12 years old, she began to live in Dalian. If I am not busy tomorrow, I will play football with you.
5.分词作状语 Having had a quarrel with his wife, he left home in a bad temper. Inhibited in one direction, it now seems that the Mississippi is about to take another. 中考主要考查引导状语从句的连词、从句时态等方面。重点考查时间状语从句、条件状语从句、结果状语从句和比较状语从句。今天就先给大家讲一下其中的 时间状语从句。 时间状语从句 在复合句中，由时间连接词引导的状语从句叫做时间状语从句。时间状语从句 通常由when, while, as，after,before,since,until等词引导。 引导时间状语从句的连词很多，为更于理解，可分为以下三类： 普通连词 如after, as, before, since, till, until, when, while等。 I will tell you after they leave. 他们走我再告诉你。 He dropped the glass as he stood up. 他站起来时，把杯子摔了。 I’d better have a think before I decide. 我最好还是先想想再作决定。 We have known each other since we were children. 我们从小就认识。 He waited until she was about to leave. 他等着一直到她准备离开。 Shut the door after you when you go out. 出去时请随手关门。