1、初二英语时间状语从句讲解与练习一、when 的用法when 从句的重点不在动作本身发生的状态，一个时间点，所以 when 多数情况下用的是一般过去时，则不用正在进行时 when 从句的动词大多是瞬时动词。 。而主句的时态没有限制,根据具体情况而定。1. When he was a child he was always trying out new ideas. 他小时候就常常试验一些新的设想。 2. When she came into my room, I was just reading a book. 她走进我房间时，我正在看书。3. Were you writing when the
2、 teacher came in? 老师进来的时候，你在写信吗？4. Sorry, I was out when you called me. 对不起，你打电话来的时候我出去了。5. He was on the point of leaving when someone knocked at the door. 他正要走，这时有人敲门。 二、while 的用法while 表示的是一段时间，是一个过程。：当 while 事件正在发生的时候，另一件事如何如何，所以 while 从句一般用的是正在进行时。1. While my wife was reading the newspaper, I wa
3、s watching TV. 当妻子正在看报纸的时候，我正在看电视。2. While Jim was mending his bike, Lin Tao came to see him. 正当吉姆修自行车时，林涛来看他。3. While they were talking, the bell rang. 正在他们谈话的时候，上课铃响了。4. You cant do your homework while youre watching TV. 你不能一边看电视一边做家庭作业。 5. While John was sitting biting his nails, I was working ou
4、t a plan to get us home. 约翰坐在那里咬指甲时，我正在制定一个回家的计划。 6. Strike while the iron is hot. 趁热打铁。三、when, while, as 的互换如果从句动作和主句动作同时发生，并且从句动作为延续性动词时，when，while，as 可以互换使用。这种情况下，它们的细微区别恐怕连英、美人自己也说不清了。1. When /While /As we were dancing, a stranger came in. 当我们跳舞时，一位陌生人走了进来。 dance 为延续性动词2. When /While /As she was
5、 making a phone call, I was writing a letter.当她在打电话时，我正在写信。 make 为延续性动词3. While/When/ As I was walking down the street, I noticed a police car in front of the bank. 我顺着马路往前走时，发现银行门前停着一辆警车。2）比较 until 和 till 此两个连词意义相同。肯定形式表示的意思是“做某事直至某时” ，动词必须是延续性的。否定形式表达的意思是“直至某时才做某事” 。动词为延续性或非延续性都可以。正确使用这两个连词的关键之一就在
6、于判断句中的动词该用肯定式还是否定式。肯定句：I slept until midnight. 我一直睡到半夜时醒了。 Wait till I call you. 等着我叫你。（在肯定句中可用 before 代替。例如：Lets get in the wheat before the sun sets.）否定句：She didnt arrive until 6 oclock. 她直到 6 点才到。 Dont get off the bus until it has stopped. 公共汽车停稳后再下车。 I didnt manage to do it until you had explain
7、ed how. 直到你教我后，我才会做。 区别：1）until 可用于句首，而 till 通常不用于句首。例如：Until you told me, I had heard nothing of what happened. 直到你告诉我以前，出了什么事我一点也不知道。3)Since 自从。 。 。 。意味一段时间。主句常用现在完成时，从句用一般过去式。后跟过去时间点/一段时间+ ago/ 句子1.David has lived in Beijing _ 2008.2.Our school basketball team has won five medals_I entered it.四be
8、fore after 的用法1.We must finish reading the books _going home .2.He worked in the car factory for two years _he gradtuated from college.3_we have lunch ,we should wash hands.before ,after 即可以作连词，后跟从句，又可以作介词，跟名词/代词/动词 ing. 练习：在下列各句的空格中填入适当的连词1_ he comes tomorrow, I shall ask where he has been. 2_ he w
9、as speaking, everybody listened carefully. 3I saw her just _ she was getting off the train. 4Have a good look at that man _ you pass him. 5It was already eight oclock _ we got there. 6. I was about to go out _ a visitor came. 7Well go to the country at the beginning of June, _ the summer harvest wil
10、l start.8. He learned to speak German _ he was in Berlin.9. Henry is in charge of the office _ Mr. Smith is away. 10. I listen to the recorder _ I have time. 11. He had learned Chinese _ he came to China. 12. _ the work was done, we sat down to sum up experience. 13. I havent seen him _ he moved to
11、the other side of the town. 14. I waited _ he came back. 15. It was not _ he took off his eyeglasses that I recognized him. 16. She likes everything to be in place _ she starts to work. 17. The thieves ran away _ they caught sight of the police. 18. They decided to go back home _ their money ran out
12、. 19. We played outside till sunset, _ it began to rain。20. _ I get to the airport, I will phone you to pick me up. 21. They were about to leave _ it began to rain. 22. He always stay in bed _ lunch time. 23. I like playing tennis _ my younger sister prefers watching ball games. 24. _ I understand y
13、our viewpoint, I dont agree with you. 25. _ she grew older, she became more responsible. 26.He watches the NBN games _there is one on TV.27 .David often goes to play basketball_school is over.28.I have been crazy about playing basketball _I was a little boy.29.Janes knees hurt babdly _it rains.30.Th
14、e teacher didnt begin her class _the students stopped talking.31 Mr Wang likes pop music _his wife likes classical music.32.The door of the lift was closed _I could walk in.33.You wont know the value of health_you lose.34.Mum was washing clothing in the washing room _the telephone rang.35 While she
15、_TV in the sitting room, the bell _A watched ,rang B was watching ,is ringing C was watching, rang D watched, was ringing37.They will start the party as soon as their teacher_( arrive)38.Ifeel bad whenever I drink something cold.翻译汉语。39.每当杰克参加晚会时，他就会穿上自己的黑衣服。_Jack _ _ _,he puts on his black suit.40.
16、He _(not leave)_ _ _what he wants.等他得到了他所要的东西才会离开Key: 1. When 2. While / When 3. as 4. when/as 5. when 6. when 7. when 8. while 9. while 10. whenever 11. before 12. After 13. since 14. till/until 15. until 16. before 17. as soon as 18. before 19. when 20. As soon as 21.when 22. until 23. while 24. While 25. As
