Unit 8

Grammar B

What were you doing when the teacher came into the classroom just now?

do homeworkclean the desktalk with my desk mateprepare for the next lessonlook for the bookread English bookshave breakfast

when I was doing homework I was cleaning the desk I was talking with my deskmat

e I was preparing for the next le

sson I was looking for the book I was having breakfast

When the teacher came in.

What was A doing while B was doing sth?

…was running while …was walking. …was playing basketball while …was

playing football. …was reading books while …was playing

computer games. …was singing while …was doing his

homework

when ,while 的区别I was reading when you came in.

I was reading when you were sleeping.

When引导的时间状语从句，谓语是延续性的，或者短暂性的。通常用一般过去时，也可以用进行时。

when while 的区别 My mother was watching TV while I was doi

ng my homework.

He was taking a shower while his wife was talking on the phone.

while引导的时间状语从句，谓语动词只能是延续性的，通常用进行时。The teacher came in ____ students were tal

king noisily.=The students were talking noisily ___ the t

eacher came in.

when

while

when 后通常加短暂性动词，如： arrive, come in,

get up, open, close, finish, begin, come, go,

arrive, reach, get to, leave, move, borrow, buy, die, knock 等While后通常加延续性动词 , 如： live, run, stay,

clean, play, hold, watch, teach, read, study,

teach, eat, drink, write, dance, sing, smoke

等

巩固练习1.My wallet dropped on the ground _______ I was running.2. __________ I was falling asleep, there was a loud knock on the door.3. __________ he was reading, an earthquake started.4. Were the students listening to the teacher car

efully __________ the teacher was giving a lesson?5. __________ the telephone rang, I became ner

vous.

while

When

While

while

When

1. I _________ my homework when Mike _____ last night.      昨天晚上迈克来的时候我正在写作业。 2. While Ann ____________TV, her father ___ home.      安正在看电视时，她父亲回来了。 3. What were you doing when I ________ at the door?     我敲门的时候你在干什么？

was doingcame

was watchinggot

knocked

4. She ______________the room when I ____ to see her.     我去看她的时候她不是在打扫房间。 5. I _____________my vocation England this time last summer.     去年夏天的这个时候我正在英国度     假。

wasn’t cleaningwent

was spending

6. Mary ___________ while Peter ___________the piano.  Mary在跳舞，而 Peter在弹钢琴。7. They _____________the newspaper when I ________ the room.    我走进屋子时他们正在看报纸。8. What _____ you _______ at five yesterday afternoon?     昨天下午 5点你在做什么？

was dancingwas playing

were readingwent into

were doing

9. The students ______________for their lessons when Mr Black entered the classroom. Black先生走进教室的时候学生们正在     准备功课。10.The teacher __________to some parents when I saw her.      我见到老师的时候她正在和家长谈      话。

were preparing

was talking