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 生的 ， 个句子就叫 状 从句。 状 从句根据其所表示的 不同，所使用的 也不同。下面我 一起来看一下几个常 的 状 从句：1 when 引 的从句：表示主句的 作和从句的 作同 生，或从句的 作 生在主句 作之前。例如： I was going out when a visitor came. ( 作同 生。) 我正要出 ，有客人来 。I shall tell her the good news when she comes.她来 ，我将告 她 个好消息。小 牛刀： I found mother cooking for me. I got home.(

2、when)_He was listening to the radio when Ihome. (get)2 while引 的从句：表示“当 程中 ”， 某一段 内主句和从句中 所表示的 作在同一 期 生。 由于 while从句表示一个持 的行 ，所以从句中要用持 性 ，并且持 性 常用 行 。例如： Keep an eye on my little sister while I am away.我不在 ， 照看一下我的小妹妹。While we were watching TV, Jim came in.我 看 的 候，Jim 来了。小 牛刀： It started to rain. We w

3、ere playing football.(while)_Lucy was cleaning the roomLily was listening to music.3 as 引 的 状 从句：表示“当 的 候；一 一 ；随着 ”，其从句的主 与主句的主 往往是同一人或物。例如： She sang as she worked.她一 工作一 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 , 我看 了他。小 牛刀：we walked, we talked.You will

4、 grow wiseryou grow older.4 before引 的从句：一般表示主句的 作 生在从句 作之前。例如： I didn t know any English before I came here.我到 儿来之前，一点英 都不懂。例如： I had written my report before my father came back.小 牛刀： He bought the tickethe went to see the film.5 after 引 的从句：表示主句的 作 生在从句 作之后。例如： After he locked the door, he left.他

5、上 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 棋。小 牛刀： I will go out to play basketball with you. I finish my homework.(after)_He left the classroomhe had finished his homework the other day.6since引 的从句：表示“自从 以来 ”，从句中的 一般表示 作的起点，用 去 。主句中的 表示 作延 的情况，一般

6、用 在完成 。如果主句中的 表示的不是延 的 作而是表示目前的状 ，可用一般 在 。例如： Since he met this good friend, he has made great progress in his studies.自从遇 了 个好朋友，他已在学 上取得了巨大的 步。例如：It is twenty years since she joined the Party.她入党二十年了。（主句中的 表示的是状 ，用 在 。）小 牛刀： it is five years since welast time. （ meet ）Mr green has taught in that s

7、chool since he(come)to China three years ago.7 until引 的从句：表示一个 作持 到某一 刻。（ 1）表示 “直到 ”，如果主句中的 是延 性 ，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 是瞬 ，必 用否定形式。例如： They worked until it was late.他 一直工作到天黑。She didn t go to bed until she finished her homework.她写完作 才睡 。小 牛刀： All the people left

8、. He waited.(until)_He went to bed . his father came home._8 as soon as引 的从句表示“一 就 ”， 作 密相 。例如： As soon as she came to the classroom, she began to read English.她一到教室，就开始 英 。小 牛刀： We start to sing. Its 12 oclock. (as soon as)_9. by the time到。 止(所在句子的主句 用完成 )例如： By the time he gets there , his father

9、has already gone.他到家的 候，他爸爸已 走了。小 牛刀： By the time I got to school, the class. （ begin ）我到校 ，已 开始上 了。知 展1. it is + 段 +since+ 一般 去 （从。 。以来多 了）例如： it is five years since we met last time.从我 上次 面已 五年了。2. it is/ will be + 段 +before+一般 在 ， it was+ 段+before+ 一般 去 (。才 )例如： it is a long time before I go to s

10、leep . 了很 我才睡着。it was an hour before the police arrived. 了一个小 ，警察才来。小 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 to the moon？3、 w

11、hen 和 while的区 区 when主从句同 生、先后 生as主从句同 生、一 一 、随着while主从句同 生然而、既然所接 例句瞬 性 、When you arrive in London, please give us a call.持 性 When he was having his lunch, he heard the door bell ring.持 性 As time went on, he grew more and more impatient.As we walked, we talked.持 性 While she was reading a novel, her

12、mother was cooking the dinner.Some people waste food while other haven tenough. I m going to the post office. While you re there, can you get me some stamps?4、巧 10 个瞬 性 在学 以when 和 while 引 的 状 从句 ，用到了瞬 和延 。常 的瞬 有die( 死 )， come( 来 )， go( 去)， eave( 离开 )， arrive( 到达 )， begin( 开始 )， buy( 买 )， ,join( 加入 )

13、，borrow( 借 ，借出 )，return( 归还 )等。这 10 个瞬 可用两句口 来帮助 : 开始离去 ,借来 , 出生入死 , 到家。注 :1. 开始离去 ,借来 为 begin,leave,go,borrow,come,return六 ；2. 出生入死 , 到家 为 join,die,buy,arrive四 。3.各 改 相 的延 ：begin be on, leave be away from, borrowkeep, go be, come be here, return be back,.join be in, die be dead, buy have, arrive be

14、 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 Sunday I(meet) Lin Hong when I(walk) in the

15、 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 friend.小试牛刀： When

16、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, Iyou up. (ring)I will call you as soon as Ithe result. (know)He _ (become) a solider when he _(grow)

17、 up .He _（wait ） until the rain _ .( stop)一、单项选择。1 The meeting didnt start_ everyone was there.A. BecauseB. untilC. whyD. if2 The boy _ to bed _ his mother came in.A. went not; untilB. didnt go; afterC. went; untilD. didnt go; until3 He _ wait until the rain _ .A won t, will stopB won t, stopC will,

18、 stopsD will, will stop4 As soon as Jane _ here, I ll post the letter to Mike.A leaveB will leaveC leavesD left5 It was already five o clock _ we got home.A whenB whileC becauseD if6 I m going to the post office. _ you re there, can you get me some stamps?A AsB WhileC BecauseD If7 Joan and Mary have

19、n t seen each other_they left school five years ago.A asB beforeC afterD since8 I will let you know about it as soon as I _ the news.A will getB getsC gotD get.9. He _ back until the work _ done.A. isnt; will beB. isnt; isC. wont be; will beD. wont be; is10.I call the police for helpI saw the thief.

20、A whileB beforeC as soon asD after11 They didnt start the work _ their teacher came back.A. untilB. whileC. as soon asD. if12.Tom will call me as soon as he _ Shanghai.A. arrivesB. will reachC. arrives inD. get to13.Im sure hell come to see me before he _ Beijing.A. will leaveB. is leavingC. leaveD.

21、 leaves14.I will tell him the news as soon as he_ back.A. comeB. comesC. will comeD. came15.I wont believe you_ I have seen it with my own eyes.A. beforeB. untilC. afterD. when16.He _ home _ she was satisfied _ his answer yesterday.A. didnt go; until; withB. wasnt go; after; toC. doesnt go; before;

22、withD. didnt go; until; to二、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 _ he went to college.4 I shall play chess with you _ I fin

23、ish 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 was listening