时间状语从句

时间状语从句 L"连词可作 从句的动作可与 时间从句动词备注 " 当……的时候主句的动作 /while/ 同时发生主句延续性动作或状并列连词时间段while "的动作是在从句 表示对比，作态的动词 "的动作的进展过而解，前面常有 程中发生逗号 When //""用得最时间的点时间同时发生先于延续性动作或状并列连词那时 // 主句的动作主态的动词短暂 多段解，前面有逗号， 句的动作是在从 性动词 句的动作的进展 过程中发生 //时间的点时间同时发生主句延续性动作或状着重指从句与主as / 的动作是在从句态的动词短暂句的动作相伴随段 的动作的进展过 发生同一个主语性动词 " 一面……一面程中发生 """，随着……。 as 用得较多 It+be+时间段+since+主语+非延续性动词 since (表示从该动作开始有多久了, It+be+时间段+since+主语+延续性动词(表示从该动作结 束时算起有多久了, not+V...until 主句???短暂性从句Until/till/ Until till 可句首，不可。not...until Before/after/ as soon as when, while, as 四、的互换 whenwhileas 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，，，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. [dance ] 当我们跳舞时，一位陌生人走了进来。为延续性动词 2. When /While /As she was making a phone call, I was writing a letter. [make] 当她在打电话时，我正在写信。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。 while, when, as五、比较 1as, when )引导短暂性动作的动词。 Just as / Just when / When I stopped my car, a man came up to me. 例如: 我刹车后，有一个人向我走来。 2when as while )当从句的动作发生于主句动作之前，只能用引导这个从句，不可用或。 When you have finished your work, you may have a rest. 例如: 干完活后，你可以休息一下。 3“”aswhen while )从句表示随时间推移连词能用，不用或。 As the day went on, the weather got worse. 例如: 日子一天天过去，天气越变越坏。 "" 这三个连词都可作当……的时候解，但它们之间有一些细微的差别。 When the clock struck twelve,all the lights went out. 当时钟敲了十二下，灯全部都熄了。 Don't forget to return this book for me,when you go to the library.你去图书馆 时，不要忘记替我还这本书。 Strike while the iron is hot. 趁热打铁。 When we arrived in Beijing,it was raining.(arrive)不是延续性的动词我们到达北京时，天 正在下雨。 Please don't talk so loud while people are working. 别人在工作的时候，请不要大声讲话。 whenwhilewhen""while和还可作并列连词用:作那时解，前面有逗号，不能用代替;while"" 表示对比，作而解，前面常有逗号。 The Queen will visit the town in May,when she will open the new hospital.女王将于五月 访问该城，届时她将主持一所新医院的开幕式。 Some materials are weldable,while others are not.一些材料是可焊的，而另一些则是不 可焊的。 3as(at the same moment that)when往往可与通用，但它着重指从句与主句的动作相 """"as 伴随发生，可译成:一面……一面，随着……。用得较多。如: Kate read the book as she went along. 凯特边走边读书。 As the car moved faster and faster,it gained more and more kinetic energy.当汽车行驶 得越来越快时，它得到的动能也越来越多。 We took notes as we listened to the lecture. 我们边听课边记笔记。 练习 1. _________ he comes tomorrow, I shall ask where he has been. 2. _________ he was speaking, everybody listened carefully. 3. I saw her just _________ she was getting off the train. 4. Have a good look at that man _________ you pass him. 5. It was already eight o'clock _________ we got there. 6. I was about to go out _________ a visi- tor came. 7. We'll go to the country at the beginning of June, _________ the summer harvest will 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 haven't seen him _________ he moved to 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. 19. We played outside till sunset, _________ it began to rain. 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