where and when to have a talk ____ 如果这个空要填一个谓语动词话,请问用单数还是复数呢?

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where and when to have a talk ____ 如果这个空要填一个谓语动词话,请问用单数还是复数呢?

where and when to have a talk ____ 如果这个空要填一个谓语动词话,请问用单数还是复数呢?
where and when to have a talk ____ 如果这个空要填一个谓语动词话,请问用单数还是复数呢?

where and when to have a talk ____ 如果这个空要填一个谓语动词话,请问用单数还是复数呢?
is
疑问词+不定式做主语要区分两种情况:
你这道题用单数,因为就只有一个 疑问词+不定式结构
但是,如果是 where to eat and when to have a talk 就要用复数.
不定式、动名词、主语从句或由两个疑问词引导的一个不定式或一个从句做定语时,谓语动词一般用单数,但多个不定式、动名词、从句做主语时,谓语用复数.如果两个短语表达同一概念,属一整体,谓语仍用单数

where and when to have a talk 看作一个整体,所以谓语动词用复数。