问题描述: Does she have a sister 为什么要用have不用has?不是说he she it要用动词三单形式吗? 1个回答 分类:英语 2014-10-17 问题解答: 我来补答 he she it的确要用动词三单形式,但是does是助动词,助动词后面要用动词原形,即has改为have.所以以后就要记住了 再问: 那什么情况用has? 再答: 举个例子吧 He has a dog She has some books等等陈述句。 但是如果是否定句,有不同了,如 He doesn't have a dog。 She doesn't have any books。 反正你记住助动词do/does/did后用动词原形 展开全文阅读