He has finished his homework变为一般疑问句
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现在完成时中
have/has
做助动词，因此可以提到句首
改为一般疑问句
Has
he
finished
his
homework？
have/has
做助动词，因此可以提到句首
改为一般疑问句
Has
he
finished
his
homework？
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