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1、时间状语从句 常见的从属连词有：(注意其汉语意义)when, while, as, before, after, since, until (till) once as soon as, the moment, the minute, immediately, directly, each/every time, the first time, the last time, next time, by the time, whenever等。例如：Every/Each time I was in trouble, he would come to my help.I thought her n
2、ice and honest the first time I met her.注意：（1）when, while, as的区别：1)when引导从句时，主从句的动作有先有后，也可以同时进行,从句的动作可以是持续性的，也可以是短暂的。如：When I got to the airport, the plane had already taken off. （主先从后）（短暂性）When I lived there, I used to go to the seaside on Sundays. (同时) （持续性）When the movie ended, the people went ba
3、ck. （从先主后）2)while侧重主从句动作的对比，且从句的动词必须是持续性的。如：While we were chatting she was looking at the time table on the wall3)as引导从句时侧重主从句动作同时或几乎同时进行，从句的动作可以是持续性的，也可以是短暂的。如：Sometimes I watch TV as I am having breakfast4）when和while还可以是并列连词，意思分别是“就在这时”，“然而”。如：I was having a rest on the sofa when the telephone ran
4、gThey were surprised that a child should work out the problem while they couldnt .注：并列连词when常用与以下句型中：was/were doingwhen（正在做突然）was/were about to dowhen（刚要做突然）was/were on the point of doingwhen(刚要做突然)had just donewhen.(刚一就)Hardly/Scarcely haddonewhen(刚一就)(2)before引导从句时,词义非常灵活，注意下列句子中的before的词义：1.Befor
5、e I could get in a word, the tailor had measured me.(还没来得及就)2.We hadnt run a mile before he felt tired.(还没就)3.We had sailed 4 days before we saw land.(才)4.Please write it down before you forget it.(趁还没就)(3)till (until) 和nottill (until)1） till (until):主句谓语动词必须是持续性的，意思是“到为止“如：He remained there till/un
6、til she arrived.2） nottill (until): 主句谓语动词必须是短暂性的，意思是“直到才”如：She wont go to bed till/until he returns home.3） notuntil还有强调式和倒装式：强调句：It is not until he returns home that she will go to bed.倒装句：Not until he returns home will she go to bed.(4)几个极易混淆的时间状语从句：1） It was +时间点+when（当的时候时间是）It was 5 am when we
7、 arrived at the village.2） It was/will be+时间段+before(没过就过了才)It was/will be two weeks before we met/meet again.3） It is /has been +时间段+since（自从以来有）It is/has been 3 years since we last met.突破点：一看be动词的时态，二看时间段还是时间点。注意：在“It is /has been +时间段+since”句型中，从句的动词必须是短暂性的，如果是延续性的动词，时间要从从句的动作结束时算起。如：It is 3 year
8、s since I smoked.( 我戒烟有三年了)补充：as soon as, immediately, directly, instantly, the moment, the minute, the instant, no soonerthan, hardly/scarcely.when.和once这些从属连接词引导的从句都表示从句的动作一发生，主句的动作随即就发生，常译为“一就”。从句中一般时态代替将来时态。every time, each time, next time, the first time, any time, all the time等名词短语用来引导时间状语从句，表
9、示“每当.，每次.；下次”等。练习题1. It was quiet _ those big trucks started coming through the town.A. before B. after C. until D. unless2. It seemed only seconds _ the boy finished washing his face.A. when B. before C. after D. even if3. Hardly had he reached the school gate _ the bell rang.A. while B. when C. as
10、 D. as soon as4.We were told that we should follow the main road _ we reached the central railway station.A. whenever B. until C. while D. wherever5. I recognized you _ I saw you at the airport.A. the moment B. while C. after D. once6. He was about to go to bed _ the doorbell rang.A. while B. as C.
11、before D. when7._I listen to your advice, I get into trouble.A. Every time B. When C. While D. Until8. _ John was watching TV, his wife was cooking.A. As B. As soon as C. While D. Till9. The children ran away from the orchard(果园) _ they saw the guard.A. the moment B. after C. before D. as10. No soon
12、er had I arrived home _ it began to rain.A. when B. while C. as D. than11. Several weeks had gone by _ I realized the painting was missing.A. as B. before C. since D. when12. It _ long before we _ the result of the experiment.A. will not be; will know B. is; will know C. will not be ; know D. is; kn
13、ow13. What was the party like? -Wonderful. Its years _ I enjoyed myself so much.A. after B. before C. when D. since14. The new secretary is supposed to report to the manager as soon as she_.A. will arrive B. arrives C. is going to arrive D. is arriving15. _ got into the room _ the telephone rang.A.
14、He hardly had; then B. Hardly had he; when C. He had not; then D. Not had he; when16. No sooner had he finished his talk _ he was surrounded by the workers.A. as B. then C. than D. when17. Did you remember to give Mary the money you owed her?-Yes, I gave it to her _ I saw her.A. while B. the moment
15、C. suddenly D. once18. I thought her nice and honest _ I met her.A. first time B. for the first time C. the first time D. by the first time19. He will have learned English for eight years by the time he _ from the university next year.A. will graduate B. will have graduated C. graduates D. is to gra
