时间状语从句讲解和练习(答案).doc

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 goi ng out whe n 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 whe n she comes. 她来时，我将告诉她这个好消息小试牛刀：I found mother cooki ng for me. I got home.(when) He was liste ning to the radio whe n 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 rai n. We were playi ng football.(while) Lucy was clea ning the room Lily was liste ning 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 work ing.I saw him as he was getti ng 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 fini shed 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 gree n has taught i n 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但表达的意思不同必须用否定形式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，(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,例如：They worked un til it was late. 他们一直工作到天黑欢迎下载小试牛刀：All the people left. He waited.(u ntil)He went to bed . his father came home.她写完作业才睡觉。

She didn ' t go to bed until she finished her homework.& as soon as 引导的从句表示 一 就”强调动作紧密相连她一到教室，就开始读英语例如： As soon as she came to the classroom, she began to read English.小试牛刀： We start to si ng. It"s 12 o"clock. (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 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+ —般过去时（从以来多长时间了）从我们上次见面已经五年了例如：it is five years si nee we met last time.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 was an hour before the police arrived. 小试牛刀：It (be) ten years since we 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leave） that city .It is reported that it may be two or three months it is possible to test this medici ne on ani malsHow long do you think it will be China 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 hav ing his lun ch, 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 impatie nt.As we walked, we talked.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 have n 'te no ugh.—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（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：begin 宀be on, leave be away from, borrow keep, go be, come be here, return be back,join tbe in, die be dead, buy have, arrive be 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） 主句（一般过去时） 主句（一般过去时） 主句（过去进行时）+when +从句（一般过去）+when +从句（过去进行时）+while +从句（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 day I (meet) Lin Hong whe n 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 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.。