Our monitor cleaned the room an hour ago 变为一般疑问句

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Our monitor cleaned the room an hour ago 变为一般疑问句
Our monitor cleaned the room an hour ago 变为一般疑问句

Our monitor cleaned the room an hour ago 变为一般疑问句
Did your monitor clean the room an hour ago?
这个句子变一般疑问句,在句首加did 后面的动词改为原形.

班长一小时前清扫了房间。

Did your monitor clean the room an hour ago?
这个句子变一般疑问句,在句首加did 后面的动词改为原形。