while 和 while
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when/while 是时间状语从句的引导词
when
when 引导的(从句谓语动词),可以是延续性的,也可以是瞬间的
例:瞬间动词 —— come in
When she came in, I stopped reading. 她进来时,我停止看书了。例:延续性的 —— lived,住
When I lived in that city, he used to come to visit me. 我在那个城市的时候,他经常来看我。有,when 可以表示 “就在那时”
We were about to leave when he came in.
当他进来的时候,我们真准备离开。
我们就要离开,就在那时他进来了。while
while 引导的 必须是延续性的。并且强调 主句 和 从句 的动作同时发生(或者相对应)
While my wife was reading the newspaper, I was watching TV.
我妻子在看报纸的时候,我在看电视。阅读是一个持续性动作
while 还可以表示对比,如:
I like playing football while you like playing basketball.
我喜欢踢足球,而你喜欢打篮球。只能使用 when 而不能用 while 的情况
1、 从句 动词 发生在主句之前
When I was washing my clothes, he called me.
我正在洗衣服时,他给我打了电话。called 是主句
2、从句 动词 发生在主句之后
When I got to the cinema, the tickets had been sold out.
我到达影院时,票已经卖光了。When I got to the cinema 是从句