时间状语从句讲解和练习(答案)

1、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 go

2、t 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。/、试牛刀：It st

3、arted 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.她边工作边唱歌。=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,

4、 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 t

5、he 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,和朋友下了盘棋。He left the classroom小试牛刀:I will go out to play basketball with you. I finish my homework.(after)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。

6、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 ha

7、s taught in that school since he (come) to China three years ago.7. until引导的从句：表示一个动作持续到某一时刻。(1)表示 直到”，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。(2)表示 直到才”，主句用否定式，从句用肯定。如果主句中的谓语动词是瞬间动词时，必须用否定形式。例如：They worked until it was late.他们一直工作到天黑。She didn t go to bed until she finished her homework.她写完作业才睡觉。/、试牛

8、刀： All the people left. He waited.(until)He went to bed . his father came home.8. as soon as引导的从句表示 就”，强调动作紧密相连。例如： As soon as she came to the classroom, she began to read English.她至U教室， 就开始读英语。/、试牛刀： We start to sing. Its 12 oclock. (as soon as)9. by the time至U。为止（所在句子的主句应用完成时）例如：By the time he get

9、s there , his father has already gone. 他到家的时候，他爸爸已经走了。小试牛刀：By the time I got to school, the class. （begin）我到校时，已经开始上课了。知识扩展1. it is +时间段+since+ 一般过去时（从。以来多长时间了）例如：it is five years since we met last time.从我们上次见面已经五年了。2. it is/ will be + 时间段 +before+ 一般现在时 例如：it is a long time before I go to sleep .it

10、 was an hour before the police arrived.it was+时间段 +before+ 一般过去时（。才）过了很长时间我才睡着。过了一个小时，警察才来。小试牛刀：It(be) ten years since we(leave) that city .It is reported that it may be two or three months it is possible to test this medicine on animalsHow long do you think it will be China sends a manned spaceship

11、 to the moon?3、when和while 的区别连词区别所接动词例句when主从句同时发生、 先后发生瞬间性动词、 持续性动词When you arrive in London, please give us a call.When he was having his lunch, he heard the door bell ring.as主从句同时发生、一边一一边一、随着持续性动词As time went on, he grew more and more impatient.As we walked, we talked.while主从句同时发生 然而、既然持续性动词While

12、 she was reading a novel, her mother was cooking the dinner.Some people waste food while other havent enough.一I m going to the post office. While you re there, can you get me some stamps?4、巧记10个瞬间性动词在学习以when和while引导的时间状语从句时，用到了瞬间动词和延续动词。常见的瞬间动词有die（死），come（来），go（去），eave（离开），arrive（至U达），begin（开始），buy

13、（买），join（加入），borrow（借进，借 出），return（归还）等。这10个瞬间动词可用两句口诀来帮助记忆：开始离去，借来还，出生入死，买到家。注释：1 .”开始离去，借来还“为 begin,leave,go,borrow,come,return 六词；2 .出生入死，买到家为join,die,buy,arrive 四词。3 .各词改为相应的延续动词为：begin fbe on, leave fbe away from, borrow fkeep, go fbe, come f be here, return fbe back, joinfbe in, diefbe dead, b

14、uy fhave, arrive fbe here 等。5、状语从句与主句的时态问题1 .由when、while引导的时间状语从句的时态：（主过从过）主句（过去进行时）+when +从句（一般过去）主句（一般过去时）+when +从句（过去进行时）主句（一般过去时）+while +从句（过去进行时）主句（过去进行时）+while +从句（过去进行时）5注意：看动词为短暂性动词用一般过去时，动词为延续性动词则用过去进行时。小试牛刀： Mother (cook ) supper when I (get) home yesterday.Last Sunday I (meet) Lin Hong wh

15、en I (walk) in the street.When the students (have ) a meeting, the teacher (come) in.While Han Meimei (sweep) the floor, Lucy (carry) water.2 .由when、after、before、by the time引导的时间状语从句的时态：主句、从句的谓语动词都已完成，则先发生的动作用过去完成时，后发生的动作用一般过去时。例如： After he had finished his work, he played a game of chess with his f

16、riend.小试牛刀： When they (get) to the cinema last light, the film (start).I (go) out with my friends after I (finish) all the homework last night.3 .时间状语从句与主句的时态不一致。(主将从现：主句用将来时，而时间状语从句用一般现在时) 小试牛刀： As soon as I reach Canada, I you up. (ring)I will call you as soon as I the result. (know)He(become) a s

17、olider when he(grow) up .He (wait) until the rain.( stop)一、单项选择。1. The meeting didnt start everyone was there.A. Because B. until C. why D. if2. The boy to bed his mother came in.A. went not; untilB. didnt go; after C. went; until D. didnt go; until3. He wait until the rain.A . won t, will stop B. w

18、on t, stop C. will, stops D. will, will stop4. As soon as Jane here, I ll post the letter to MikeA. leaveB. will leave C. leaves D. left5. It was already five o clock we got home.A . when B. while C . because D. if6. - I m going to the post office. you re there, can you get me some stamps?A. AsB. Wh

19、ile C. Because D. If7. Joan and Mary haven t seen each other they left school five years ago.A . as B. beforeC . after D. since8. I will let you know about it as soon as I the news.A. will get B. getsC. got D. get9. He back until the work done.A. isnt; will beB. isnt; isC. wont be; will beD. wont be

20、; is10. I call the police for help I saw the thief.A. while B. beforeC. as soon as D . after11. They didnt start the work their teacher came back.A. until B. whileC. as soon as D. if12. Tom will call me as soon as he Shanghai.A. arrives B. will reach C. arrives in D. get to13. Im sure hell come to s

21、ee me before he Beijing.A. will leave B. is leaving C. leave D. leaves14. I will tell him the news as soon as he back.A. come B. comes C. will come D. came15.1 wont believe you I have seen it with my own eyes.A. before B. untilC. afterD. when16. He home she was satisfied his answer yesterday.A. didn

22、t go; until; withB. wasnt go; after; toC. doesnt go; before; withD. didnt go; until; to、用方框中的单词填空。when 、before、 after 、as 、since、 while、 until 、as soon as1. Mum was making cookies in the kitchen the telephone rang.2. I was watching TV my wife was cooking.3. He had worked in a factory for two years h

23、e went to college.4. I shall play chess with you I finish watching TV.5. He didn t get to the airport it was dark.6. She sang she went along.7. I haven t heard from him he went to America.8. We found the books two days he had gone away.三，完成句子。1 .他进来时，我在吃饭。 , I was eating.2 .我在那封信寄到之前去北京了。I had left for Beijing just .3 .当我在玩电脑游戏时，爸爸在听音乐。Father