1、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：1when 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)2while 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 star
3、ted to rain. We were playing football.(while)_Lucy was cleaning the room Lily was listening to music.3as 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 walke
4、d, we talked.You will grow wiser you grow older.4before 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 didnt 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.5after 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.6since 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
6、，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 ）2Mr
7、 green has taught in that school since he (come) to China three years ago.7until 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 didnt go to bed until she finished her homework. 她写
8、完作业才睡觉。小试牛刀：All the people left. He waited.(until)_He went to bed . his father came home._8as soon as 引导的从句表示“一就”，强调动作紧密相连。例如：As soon as she came to the classroom, she began to read English.她一到教室，就开始读英语。小试牛刀：We start to sing. Its 12 oclock. (as soon as)_9. by the time 到。 。 。为止 (所在句子的主句应用完成时 )例如：By t
9、he time he gets 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 ， it was+时间段 +before+一般过去时 (。 。
10、 。才)例如：it is a long time before I go to sleep . 过了很长时间我才睡着。it was an hour before the police arrived.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 _ Chi
11、na sends a manned spaceship 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、一边一边、随着持续性动词 As time went on, he grew more and more impatient.As we walked, we tal
12、ked.while 主从句同时发生然而、既然持续性动词 While she was reading a novel, her mother was cooking the dinner.Some people waste food while other havent enough.Im going to the post office. While youre there, can you get me some stamps?34、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(
13、 去)， eave(离开)，arrive(到达)，begin(开始)，buy(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：beginbe on, leavebe away from, borrowkeep, gobe, comebe here, returnbe b
14、ack, joinbe in, diebe dead, buyhave, arrivebe 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）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 Sun
15、day I (meet) Lin Hong when 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
16、a game of chess with his friend. 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 resu
17、lt. (know)He _ (become) a solider 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; until B. didnt go; after C. went; until D. didnt go; until3He _ wait u
18、ntil the rain _ .Awont, will stop Bwont, stop Cwill, stops Dwill, will stop4As soon as Jane _ here, Ill post the letter to Mike.4Aleave Bwill leave Cleaves Dleft5It was already five oclock _ we got home.Awhen Bwhile Cbecause Dif6Im going to the post office. _ youre there, can you get me some stamps?
19、AAs BWhile CBecause D If7Joan and Mary havent seen each other_they left school five years ago.Aas Bbefore Cafter Dsince 8I will let you know about it as soon as I _ the news. Awill get Bgets Cgot Dget 9. He _ back until the work _ done.A. isnt; will be B. isnt; is C. wont be; will be D. wont be; is1
20、0. I call the police for help I saw the thief.Awhile Bbefore Cas soon as Dafter11 They didnt start the work _ their teacher came back.A. until B. while C. 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 see me bef
21、ore 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.I wont believe you_ I have seen it with my own eyes.A. before B. until C. after D. when16. He _ home _ she was satisfied _ his answer yesterday.A. d
22、idnt go; until; with B. wasnt go; after; toC. doesnt go; before; with D. didnt go; until; to二、用方框中的单词填空。when 、before 、 after 、as 、since 、 while、 until 、as soon as 1Mum was making cookies in the kitchen _the telephone rang.2I was watching TV _ my wife was cooking.3He had worked in a factory for two y
23、ears _ he went to college.4I shall play chess with you _ I finish watching TV.5He didnt get to the airport _ it was dark.6She sang _ she went along.7I havent heard from him _ he went to America.8We 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 le
24、ft for Beijing just .53.当我在玩电脑游戏时， 爸爸在听音乐。Father was listening to music the computer games.4,当我有时间，我就去看望我的爷爷。 I will visit my grandpa .5.他一到学校就把一切都准备好了。She got everything ready .6. 你一到上海就给我打个电话好吗？Will you please call me _ _ _ you get to Shanghai.7. 他长大后相当一名记者。He wants to be a journalist _ _ _ _.答案：1
25、-5 BDCCA 6-10 BDDBC ACDBBA答案：1when 2 while3before 4 as soon as 5until 6as7since 8afterWhen she came in before the letter arrivedWhile I was playing when I have timeas soon as she got to schoolas soon aswhen he grows up.1、答案：When I got home, I found mother cooking for me./I found mother cooking for me when I got home.2、答案：We start to sing as soon as its 12 oclock.3、答案：I will go out to play basketball with you after I finish my homework.4、答案：He waited until all the people left.5、答案：It started to rain while we were playing football
