who cleaned the room this morning?I did里面为什么不能用cleaned?
人气：395 ℃ 时间：2019-11-14 02:53:23
解答
首先 ,英语不习惯重复~·
所以cleaned 可用did 代替
如果你想说I did cleaned
那样是错误的形式 助动词后面用动词原形~
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