we have two rooms to live in,but we haven't decided which one to choose.
which one to choose.为什么不用to choose which one?
人气：113 ℃ 时间：2020-02-03 03:24:45
解答
这个语法结构叫“疑问词 + 不定式”,该结构相当于一个名词（短语）,在句中充当主语/宾语/表语等成分.如果是疑问代词,则疑问词一般充当不定式中某个动词或介词的宾语.如：I don't know what to do.what to do 做know...
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