When you your homewok? I had finished it before he came back
A have finishedC did finish为什么A不行?如果把have改成had A可以吗?
人气：123 ℃ 时间：2019-12-19 14:51:58
解答
因为后面用的也是had finished(过去完成时)啊?
改成had是完全可以的,表示先做玩这个动作.
你前面when的句子不完整,差动词啊!when后面是个空格。。。也就是when had you 和when did you 都可以咯？Yes.
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