He cleaned the room on Sunday .改否定、一般问、并两答,

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HecleanedtheroomonSunday.改否定、一般问、并两答,HecleanedtheroomonSunday.改否定、一般问、并两答,HecleanedtheroomonSunday.改

He cleaned the room on Sunday .改否定、一般问、并两答,
He cleaned the room on Sunday .改否定、一般问、并两答,

He cleaned the room on Sunday .改否定、一般问、并两答,
He didn't clean the room on Sunday.
Did he clean the room on Sunday?
Yes,he did./No,he didn't

He didn't clean the room on Sunday.
Did he clean the room on Sunday?
Yes, he did.
No, he didn't.