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疑问词加不定式做什么语?

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疑问词加不定式做什么语?
疑问词加不定式做什么语?
“疑问词加不定式”相当于一个名词.而名词可用作主语、宾语和表语等.因
此,“疑问词加不定式”可用作主语、宾语和表语.e.g.
① When to go there is my question.(When to go there 作主语)
② My question is when to go there.(when to go there 作表语)
③ I want to know when to go there.(when to go there 作宾语)