He has finished doing his homework.(变为否定句)急!

He has finished doing his homework.(变为否定句)急!
英语人气:900 ℃时间:2019-12-16 08:36:49
优质解答
这是一个现在完成时的句子,现在完成时的否定把
have/has 改为haven't /hasn't
He hasn't finished doing his homework
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