Does she have a bibycle?

问题描述:

Does she have a bibycle?
这句话里面的have为什么不用第三人称单数has?

Does she have a bicycle?
她有一辆自行车吗?
主语she是第三人称单数,动词应该用三单形式.不过问句开头已经有了三单形式的助动词does,作为谓语的实义动词have就不用改为has了.在助动词后的动词都用原形.