He has to walk to the station every day,hasn't he?为什么要该成He has to walk to the station every day,doesn't he?

问题描述:

He has to walk to the station every day,hasn't he?为什么要该成He has to walk to the station every day,doesn't he?
为什么has不行?

用has的前提是它在句子中做助动词,而在这个句子中,has是实意动词,它的否定和疑问需要用到其助动词does.
所以反意疑问的时候要用does.