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判断这四句话是否正确 It is not useful whether you write to her or call

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判断这四句话是否正确
It is not useful whether you write to her or call him up.
It is no useful whether you write to her or call him up.
It is no use whether you write to her or call him up.
It is not use whether you write to her or call him up.
这四句话有正确的吗 并帮我说明其他错的原因.
no not怎么分啊?还有后面该用什么词性use useful?
很简单,use在这是名词,表示用处,有用,而useful是形容词,not是句子的否定,后跟的是形容词,而NO后得跟名词,所以第三句话是正确的.
第一句话,根据意思,是说这样做没用,而useful意思是有用处的.
第2句和第四句搭配错了