He has his hair cut every month,does not he

问题描述:

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.