时间状语从句.ppt

1、Grammar: The Adverbial clause of time 引导词: when, while, as, before, after, since, until, as soon as, every time, each time, the moment, by the time immediately , the minute , the second.,when/as/while,when 当时候 从句可以用延续性动词，也可用短暂性动词 I was watching TV when he came . When he was walking along the street

2、.he met an old friend. 常考句型： be about to do when 刚要做某事，突然发生了另外的事 be doing when 正做着什么 突然发生了另外的事 had just done when 刚好做了某事，突然发生另外的事,Eg: I was about to leave when the telephone rang. 我们正在化学实验室工作，突然停电了。 We were working in the chemistry lab when the lights went out. 我们刚吃完午饭，他就回来了。 We had just finished ou

3、r lunch when he came back. 表示原因“既然” It was foolish of you to take a taxi when you could easily walk there in five minutes.,while 用法 只能跟延续性动词，表示一段时间内 “当时候，在期间” While I was reading ,he came in. 我在伦敦的时候交了一些外国朋友。 I made some foreign friends while I was in London. Strike while the iron is hot. “趁着” 引导让步状

4、语从句，表示“虽然，尽管” While I understand your meaning, I dont agree with you. 作为并列连词，表示对比，意为“而，却” He likes pop music, while Im fond of folk music.,as 表示从句的动作与主句的动作同时发生，可以指时间点，也可以指时间段 “随着；一边一边；当的时候” The students sang as they walked. As he grew older, he began to go deaf. 随着时间的推移，天气越来越冷了。 As time goes on ,it

5、is getting colder and colder. With time going on ,before 在之前；多久才；不久就；还未来得及;趁着 Please remember to turn off all the lights before you leave the classroom. We had sailed four days and nights before we saw the land. It will be half a year before I come back. It was half a year before I came back. We had

6、nt run a mile before he felt tired. 我们不久就会见面的。 It wont be long before we meet again. He left before I could say a word. Please write it down before you forget it.,since 自从以来，表示以过去的某一时间为起点，持续到现在或过去的某时间，since 从句多用一般过去时，主句多用现在完成时或者现在完成进行时 I have been at his bedside ever since he became ill. I havent wr

7、itten home since Christmas. She has been working in the factory since she left school.,It is( has been) +some time +since 从句的翻译 It is (has been) two years since we began to use the machine. 我们开始用这台机器已经有两年了。 It is three years since the war broke out. 战争爆发以来已经有三年了。 It is three years since she was in o

8、ur class. 她离开我们班有三年了。 It is three years since I smoked a cigar. 我不吸烟已经有三年了。,until和till及notuntil的用法,until和till都可表示“直到为止”，主句为肯定句，主句谓语动词需为延续性动词。 He waited until / till we finished our meal. 当主句为否定句，主句谓语动词需为短暂性动词 I didnt leave until / till she came back. until引导的从句可以放在主句之前或主句之后，但till从句一般不放在句首。 Until he

9、told me, I knew nothing about it.他告诉我了我才知道。 注意： I didnt leave until she came back. a.当not until位于句首时，主句中的谓语要使用部分倒装： Not until she came back did I leave. b.在强调句型中一般用until，不用till。如： It was not until she came back that I left.,every time; each time; next time; the last time ;the first time; any time 等名

10、词短语用来引导时间状语从句 Every /Each time I was in trouble, he would come to help me out. Next time you come, do remember to bring your son here. The last time we saw James, he was lying in bed. The first time I climbed onto the wall , I felt nervous. You are welcome to come back any time you want.,表示“一就”的词及词组

11、: as soon as; immediately, directly, instantly; the moment, the second, the minute;the instant no soonerthan, hardly/scarcelywhen once(一旦就) The boy burst into tears immediately/directly/instantly he saw his mother. The moment I heard the voice, I knew father was coming. Once you remember it ,you wil

12、l never forget it.,No sooner had we arrived at the station than the train left. I had hardly got home when it began to rain. Hardly had I got home when it began to rain. 小结：时态：no sooner /hardly/scarcely 主句部分用过去完成时，than/when 从句谓语用一般过去时 把no sooner/ hardly/scarcely放在居首时应用倒装语序主句部分倒装,1. I do every single

13、 bit of housework_ my husband Bob just does the dishes now and then. A. since B. while C. when D. as 2.Scientists say it may be five or six years _ it is possible to test this medicine on human patients. since B. after C. before D. when,3._ I accept that he is not perfect , I do actually like the pe

14、rson. A. While B. Since C. Before D. Unless 4.We were told to follow the main road _ we reached the central railway station. A. whenever B. until C. while D. wherever,5.It is almost five years _ we saw each other last time. A. before B. since C. after D. when 6. The American Civil War lasted four ye

15、ars _ the North won in the end. A. after B. before C. when D. then,7.-Did Jack come back early last night? -Yes. It was not yet eight oclock_ he arrived home. A. before B. when C. that D. until 8. The field research will take Joan and Paul about five months ;it will be a long time _ we meet them aga

16、in. A. after B. before C. since D. when,9. Someone called me up in the middle of the night, but they hung up _ I could answer the phone. A. as B since C. until D. before 10. He was about to tell me the secret _ someone patted him on the shoulder. A. as B. until C. while D. when,11. Why do you want a new job _ youve got such a good one? A. that B. where C. which D. when 12._ was in 1979 _ I