因?yàn)?有具體的時(shí)間點(diǎn)
-Yes,did it after the first class. 這是具體的時(shí)間點(diǎn),有具體的時(shí)間,不可以用現(xiàn)在完成時(shí),
謝謝 !希望采納嗯嗯 不客氣 不用謝..呵呵..那如果要把Yes, i did it after the first class.改為havedone 怎么改呢把后面的時(shí)間去掉，it after the first class.后面的不要了把。
Have you cleaned the blackboard of the laboratory,peter?--Yes,i__it after the first class.
Have you cleaned the blackboard of the laboratory,peter?--Yes,i__it after the first class.
a.have done b.did c.will do 為什么不是a?.
a.have done b.did c.will do 為什么不是a?.
英語(yǔ)人氣：861 ℃時(shí)間：2020-05-23 13:49:22
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