He had breakfast at six.

问题描述:

He had breakfast at six.
变一般疑问句和否定句

一般疑问句: Did he have breakfast at six ?
和否定句: He didn't have breakfast at six.
祝你学习进步,更上一层楼! (*^__^*)
不明白的再问哟,请及时采纳,多谢!