Have you cleaned the blackboard of the laboratory,peter?--Yes,i__it after the first class.
a.have done b.did c.will do 为什么不是a?.
人气:455 ℃ 时间:2020-05-23 13:49:22
解答
因为 有具体的时间点
-Yes,did it after the first class. 这是具体的时间点,有具体的时间,不可以用现在完成时,
谢谢 !希望采纳嗯嗯 不客气 不用谢..呵呵..那如果要把Yes, i did it after the first class.改为havedone 怎么改呢把后面的时间去掉,it after the first class.后面的不要了把。
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