否定句：He didn't put his book on the desk.
一般疑问句：Did he put his book on the desk?
He put his book on the desk.(改为否定句,和一般疑问句)
He put his book on the desk.(改为否定句,和一般疑问句)
英语人气：839 ℃时间：2019-10-08 12:28:34
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