Ann returned the book to the library yesterday.改为一般疑问句后retur

问题描述:

Ann returned the book to the library yesterday.改为一般疑问句后return要加s吗?
1个回答 分类:英语 2014-11-17

问题解答:

我来补答
Did Ann return the book to the library yesterday?
不需要哦~因为does do did这类助动词后面都用原型哦~这里是过去所以用did
 
 
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