during,while和when有什么区别?

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during,while和when有什么区别?during,while和when有什么区别?during,while和when有什么区别?[辨与析]during,when,whileduring后面接

during,while和when有什么区别?
during,while和when有什么区别?

during,while和when有什么区别?
[辨与析] during,when,while
during后面接名词:I went to visit the Great Wall during the summer vacation.我暑假里去游览了长城.
when,while都意为“当…”,都引导时间状语从句.
when强调时间点,通常译为“当…”,例如:
When she came in,I was cooking.她进来时,我正在做饭.
while强调时间段,通常译为“正当……”,例如:
While he was cooking,a friend of his came to see him.当他正在做饭的时候,一个朋友来拜访他.

during 是 在……期间

during the war
while , when都是当……时
但是while一般用做对比,如:
i was singing while he was dancing.
when范围大些,用的也多些
如:
when i came in , he was sitting in the sofa.
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