has是have 的三人称单数,have有两种用法,一种是
实义动词可以翻译为“有”等一些意思,另外一种是
助动词,用在完成时中
does是 do 的三人称单数,do是助动词
也就是说当主语是第三人称单数的时候,do变为does, have变为has
当有does出现的时候,句子中的实义动词就用动词原形如:He does not like apples.
have 做实义动词: He has a new pen.
He doesn't have a new pen. (have 做实义动词,构成否定句需要助动词)
have 做助动词: He has read this book.本回答被提问者采纳