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i don't think a warm winter always has a negative influence

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i don't think a warm winter always has a negative influence on our life,_______?
为什么不是has not it喃
例如i dont believe he well succeed,well he?
应为does it
这里的has为实义动词所以用does,而前面否定所以反问用肯定
当主语为第一人称I,谓语动词为(don't)think ,believe ,suppose ,expect,imagine,reckon等时,附加部分的主语和谓语动词与宾语从句中的谓语动词和主语保持一致,并用肯定形式.例如:(1)I didn't think he was happy,was he?我认为他并不幸福,是不是?(2)I don't suppose that he cares ,does he?我认为他并不关心,是不是?(3)I think Lucy is a good girl,isn’t she?我认为露西是一个好女孩,不是吗?