He has his hair cut every month,does not he为什么用does not he ,而不用has not he

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He has his hair cut every month,does not he为什么用does not he ,而不用has not he
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He has his hair cut every month,does not he为什么用does not he ,而不用has not he
He has his hair cut every month,does not he
为什么用does not he ,而不用has not he

He has his hair cut every month,does not he为什么用does not he ,而不用has not he
这里的has是实意动词,不是现在完成时.
have(has) sth done 让别人把某事做了.
所以,必须使用助动词进行提问或反问.

have sth done 这里的have 不是助动词
所以才用does