外研社英语八年级Module8 Unit 3.ppt

Unit 3 Language in use when和while的区别还在于: while引导的时间状语从句多用进行时态，而when引导的时间状语从句多用一般时态。如： While they were talking, the bell rang. 他们谈话的时候，上课铃响了。 I was doing my homework when my mother came back home yesterday evening. 昨天晚上妈妈回家的时候，我正在做家庭作。 注 意 (1) 如主句谓语动词表示的是短暂动作，从句时间状语指一段时间，when, while, as 三者可通用。 Peter came in while /as I was watching TV. 当Peter进来的时候我正在看电视。 I was watching TV when Peter came in. 当Peter进来时我正在看电视。 He entered the room when / as / while the meeting was going on. 正当开会的时候他走进了房间。 (2) as 和 while可用来指一段时间，但 as 强调主句与从句表示的动作同时发生，while强调主句表示的动作是在 while 从句的动作延续中发生。 As my mother sang those old songs, tears ran down her cheeks. 当我妈妈唱起那些老歌时，眼泪顺着她的脸颊流了下来。 I came in while he was reading an interesting book in his room. 我进来时他正在房间里读一本有趣的书。 1. I ______________ (watch) TV when she _______ (call). 2. When the phone _______ (ring), she ___________ (write) a letter. 3. While we ____________ (have) a picnic, it _________ (start) to rain. was watching called rang was writing were having started 5. While we ____________ (wait) for the bus, a girl ____________ (run) up to us. 6. I ____________ (telephone) a friend when Bob __________ (come) in. 7. Jim ____________ (jump) on the bus as it ____________ (move) away. 8. We ____________ (test) the new machine when the electricity ________ (go) off. were waiting was running was phoning came was jumping was moving were testing went 9. While mother ___________ (make) the bed, the door bell ____________ (ring). 10. As I ____________ (walk) in the park, it _______ (begin) to rain. 11. It was quite late at night. George __________ (read) and Amy __________ (play) her needle when they __________ (hear) a knock at the door. was making rang was walking began was reading was playing heard ( ) 1. Mary ______ a dress when she cut her finger. A. made B. is ma