An earthquake may hit some places at any time.Do you know what to do in an earthquake?为什么用at和what?为什么不是in和how呢?

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An earthquake may hit some places at any time.Do you know what to do in an earthquake?为什么用at和what?为什么不是in和how呢?
An earthquake may hit some places at any time.Do you know what to do in an earthquake?为什么
用at和what?为什么不是in和how呢?

An earthquake may hit some places at any time.Do you know what to do in an earthquake?为什么用at和what?为什么不是in和how呢?
at any time 是固定短语,"在任何时候/随时",不能换成in.
因为do是及物动词,必须跟宾语,而how是副词,不能作宾语,因此只能用what 来作宾语.
这种情况就可用how .
Do you know how to do the homework

at any time是固定搭配,表示“随时、任何时候”;what to do和how to do都可以,只是翻译时有些不同。

你好!

at any time在任何时候,是搭配

what to do中what做do的宾语,用How的话就缺少了do的宾语,句子将不完整

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at any time 是英语中的固定搭配,咋任何时候。就如汉语中的固定搭配一样。
第二句的意思是,你知道在地震中改去做什么吗?
你对句子成分了解吗?
动词,有及物动词和不及物动词,及物动词就是后面接物。
比如此题中 to do 这个do 是及物动词,后面要接上物,做宾语,而宾语不能是副词,所以how不能用,而what是代词,可以做do 的定语
what t...

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at any time 是英语中的固定搭配,咋任何时候。就如汉语中的固定搭配一样。
第二句的意思是,你知道在地震中改去做什么吗?
你对句子成分了解吗?
动词,有及物动词和不及物动词,及物动词就是后面接物。
比如此题中 to do 这个do 是及物动词,后面要接上物,做宾语,而宾语不能是副词,所以how不能用,而what是代词,可以做do 的定语
what to do
how to do it.
如果的我的讲解你哪儿不明白的话,可以继续问我,我会帮你解答的,希望这个答案您能满意
what 与how的区别是一个是疑问代词,一个是疑问副词。

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