what to do
疑问代词who,what,which好疑问副词when,where,how等后面加动词不定式,构成“疑问词+动词不定式”结构,可在句中做主语,宾语,表语等成分.如:
1.How to do it well is a very important problem.(作主语)
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2.He told me where to find the book.(作宾语)
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3.The question is which to choose.(作表语)
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