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英语
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tom has finished his homework doesn't he
Tom has finished his work,_____he?
为什么用 hasn't
什么时候用doesn't
?讲解仔细点
例题
人气：208 ℃ 时间：2019-12-08 19:22:57
解答
因为前面是现在完成时态,有助动词HAS,故要用hasn‘t,不能用doesn't.
比较：Tom finishes his work,doesn't he?
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