while和when引导的时间状语从句主句用一般时

while和when引导的时间状语从句,主句用（一般过去时）从句用（过去进行）.while引导的从句要加延续性动词，而when 延续和短暂性动词都可以，。

6. 另外，when和while的区别还在于：while引导的时间状语从句多用过去进行时态，而when引导的时间状语从句多用一般过去时态。While they were talking , the bell rang.

正在他们谈话的时候，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，我正在做家庭作业。

我在做饭的时候简正在练习。

当此句改变主从句的位置时，则用when引导。

老师进来时（这一时刻），他们在擦地板。

他们正擦地板时（这段时间），老师进来了。

2. when 说明从句的动作和主句的动作可以是同时，也可以是先后发生；while 则强调主句的动作在从句动作的发生的过程中或主从句两

个动作同时发生。例如：They

1.While we____(wait)for the bus,a girl__________(run)up to

us.

2.I__________(telephone)a friend when Bob__________(come)in.

6.While mother______(put)Cathy to bed,the door

bell_______(ring).

7.when I________(walk)in the park,it__________(begin) to rain.

9.George____(read)when they______(hear)a knock at the door.

1.I_____(have)my breakfast t at half past six yesterday morning.

3.What_____you___(do)at that time? We_____(watch)TV.

6.____they___(have)a meeting at 4 yesterday

afternoon?No,they_____.They_____(clean)the classroom.

13.When the bell rang,jenny_____(wait )in her seat.

14.She_____(make)her dress the whole afternoon.

1 .I ______ a meal when you _____ me.

a. cooked, were ringing

b. was cooking, rang

c. was cooking, were ringing

d. cooked, rang

2.He said he _____ to draw a plane on the blackboard at that time.

a. tries

b. tried

c. was trying

d. will try

3.While she ______ TV, she ______ a sound outside the room.

a. was watching, was hearing

b. watched, was hearing

c. watched, heard

d. was watching, heard

4.They _____ a football game from 7 to 9 last night.

a. were watching

b. watch

c. watched

d. are watching

10.He ____ his father on the farm the whole afternoon last Saturday.

a. helps

b. would help

c. was helping

d. is helping

11.While mother _______ some washing, I _____ a kite for Kate.

a. did, made

b. was doing, made

c. was doing, was making

d. did, was making

13.He ____ some cooking at that time, so he _____ me

a. did, heard

b. did, didn't hear

c. was doing, heard

d. was doing, didn't hear

14.This time yesterday jack _____ his bike. He _____ TV

a. repaired, didn't watch

b. was repairing, watched

c. repaired, watched

d. was repairing, wasn't watching

如有侵权请联系告知删除，感谢你们的配合！

如有侵权请联系告知删除，感谢你们的配合！