初中英语when_while练习题

一.改错
1.She is fat but I am thin.
2.It was raining while we arrived.
3.She sang while he walked.
4.I don't know them well，while they are my neighbors.
二.选择最佳答案：
1.She thought I was praising her child，_____，in fact，I was scolding him for his bad behaviors at school.
A.what
B.while
C.so that
D.therefore
2.I do every single bit of housework ____ my husband Bob just does the dishes now and then.(2004全国卷II35)
A.while
B.since
C.when
D.as
3.______ it is expected that students come university with the ability to take a good set of notes，this is not always the case.
A.When
B.As
C.For
D.While
4.We were swimming in the lake ___ suddenly the storm started.
A.when
B.while
C.until
D.befor
一、用所给动词的适当形式填空
1.Betty (watch) TV last night.
2.The Shutes usually (have) supper at 6:30 .
3.The boys (play football on the playground now.
4.Lucy (leave) the classroom half an hour ago.
5.It (snow) heavily when they left the station.
6.she (fall) off the tree just now?
7.It (rain) almost every day last month.
8.---where you (catch) the fish?
---I (catch) it in the river near the house.
9.She (write) a letter to her friend last night. But I don't know whether she has finished it or not.
二、句型转换
1.I got up late this morning.(改为否定句）
I up late this morning.
2.She had a bad cold yesterday.(改为一般疑问句）
she a bad cold yesterday?
3.He left home twenty minutes ago? (对划线部分提问）
he home ?
4.The boys were playing football at 5:00 yesterday afternoon.(划线提问）
the boys at 5:00 yesterday morning?
三、根据汉语意思完成句子
1.昨天晚上迈克来的时候我正在写作业。

I my homework when Mike last night.
2.安正在看电视时，她父亲回来了。

While Ann TV, her father came home.
3.我敲门的时候你在干什么？
What were you doing when I at the door?
4.我去看她的时候她正在打扫房间。

She the room when I to see her.
5.去年夏天的这个时候我正在英国度假。

I my vocation in England this time last summer.
四、判断正误，不错误的部分改正过来。

1.I practiced my oral English at 8:00 yesterday evening.
2.He has been here just now.
3.When we had supper, the light went out.
4.I first met Mary three years ago. She worked at a radio shop then.
5.He always thought more of others than of himself.
6.While I saw her, she was working at the computer.
when和while的用法和区别
while和when都是表示同时，到底句子中是用when还是while主要看从句和主句中所使用的动词是短暂性动作（瞬时动词）还是持续性动作。

1、若主句表示的是一个短暂性的动作，而从句表示的是一个持续性动作时，两者都可用。

如：
He fell asleep when [while] he was reading. 他看书时睡着了。

I met him when [while] I was taking a walk in the park. 我在公园散步时遇到了他。

2、若主、从句表示两个同时进行的持续性动作，且强调主句表示的动作延续到从句所指的整个时间，通常要用while。

如：
Don’t talk while you’re eating. 吃饭时不要说话。

I kept silent while he was writing. 在他写的时候，我默不作声。

3、若从句是一个短暂性动作，而主句是一个持续性动作，可以when 但不用while。

如：When he came in, I was listening to the radio. 他进来时，我在听收音机。

It was raining hard when we arrived. 我们到达时正下着大雨。

4、若主、从句表示的是两个同时(或几乎同时)发生的短暂性动作，一般要用when。

如：
I thought of it just when you opened your mouth. 就在你要说的时候，我也想到了。

至于什么是短暂性动作，什么是持续性动作，其实有个很简单的规律。

就是如果是进行时态，一般是持续性的。

如果是过去式，一般是短暂性动作。