大家好,我是小典,我来为大家解答以上问题。when和while的用法总结,when和while的用法很多人还不知道,现在让我们一起来看看吧!
1、①when意为"在……时刻或时期",它可兼指"时间点"与"时间段",所引导的从句的动词既可以是终止性动词,也可是持续性动词。
2、如: When I got home, he was having supper.我到家时,他正在吃饭。
3、 When I was young, I liked dancing.我年轻时喜欢跳舞。
4、 ②while只指"时间段",不指"时间点",从句的动词只限于持续性动词。
5、如: While I slept, a thief broke in.在我睡觉时,盗贼闯了进来。
6、 辨析 ①when从句与主句动作先后发生时,不能与while互换。
7、如: When he has finished his work, he takes a short rest.每当他做完工作后,总要稍稍休息一下。
8、(when = after) When I got to the cinema, the film had already begun.当我到电影院时,电影已经开始了。
9、(when=before) ②when从句动词为终止性动词时,不能由while替换。
10、如: When he came yesterday, we were playing basketball.昨天他来时,我们正在打篮球。
11、 ③当从句的谓语是表动作的延续性动词时,when, while才有可能互相替代。
12、如: While / When we were still laughing, the teacher came in.正当我们仍在大声嬉笑时,老师进来了。
13、 ④当从句的谓语动词是终止性动词,而攻偿掇锻墀蹬峨拳法哗且主句的谓语动词也是终止性动词时,when可和as通用,而且用as比用when在时间上更为紧凑,有"正当这时"的含义。
14、如: He came just as (or when) I reached the door.我刚到门那儿,他就来了。
15、 ⑤从句的谓语动词如表示状态时,通常用while。
16、如: We must strike while the iron is hot.我们应该趁热打铁。
17、 ⑥while和when都可以用作并列连词。
18、 Mike is tall while his brother is short.迈克的个子很高,然而他弟弟很矮。
19、 Mary was on her way home when two big boys stopped her.玛丽正走在回家的路上,这时两个大个子男孩拦住她。
本文到此讲解完毕了,希望对大家有帮助。