为什么I don't know what to do成立而I don't know how to do不成立

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为什么I don't know what to do成立而I don't know how to do不成立
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为什么I don't know what to do成立而I don't know how to do不成立
为什么I don't know what to do成立而I don't know how to do不成立

为什么I don't know what to do成立而I don't know how to do不成立
I don't know how to do it.do后缺宾语,how 问方式

疑问词有两种:疑问代词和疑问副词。
疑问代词有what, which, who, whom。疑问代词属于代词,在句子中可以充当主语、宾语或定语。
疑问副词有when, where, how, why。疑问副词属于副词,在句子中只能充当状语,修饰动词。when充当时间状语,where地点状语,how方式状语,why原因状语。
I don't know what to do成立...

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疑问词有两种:疑问代词和疑问副词。
疑问代词有what, which, who, whom。疑问代词属于代词,在句子中可以充当主语、宾语或定语。
疑问副词有when, where, how, why。疑问副词属于副词,在句子中只能充当状语,修饰动词。when充当时间状语,where地点状语,how方式状语,why原因状语。
I don't know what to do成立,因为do是及物动词,必须带宾语。what充当do的宾语。
I don't know how to do不成立,因为do是及物动词,必须带宾语。而这里do没带宾语。(how是方式状语。是修饰do的。)

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I don't know what to do成立,因为do是及物动词,必须带宾语。what充当do的宾语。
I don't know how to do不成立,因为do是及物动词,必须带宾语。而这里do没带宾语。(how是方式状语。是修饰do的。)

it 是do 的宾语,what是do 的宾语,从句子成分来分析一下就行了。标准的I don

正在学这个,这个是宾语从句,根据缺什么补什么的原则I don't know 缺了宾语,而what to do是what可以作宾语的{to do是what的后置定},而 how to do不可能是do how,how不是名词性的不可以做宾语, how to do缺了宾语。