问题标题:
Thelazyboymusthavebeendismissedlastweek,()he?A.hasn'tB.haven'tC.doesn'tD.didn't到底选哪个?
问题描述:

Thelazyboymusthavebeendismissedlastweek,()he?A.hasn'tB.haven'tC.doesn'tD.didn't

到底选哪个?

彭潇回答:
  答案选D.didn't   反意疑问句,从lastweek可以判断这里只有D.didn't正确
吕艳辉回答:
  最佳答案是was't吗
彭潇回答:
  当must+havedone表示对过去的情况进行推测(一般句中有明确的过去时间状语),问句要根据陈述部分谓语的情况用“didn't+主语”或“wasn't/weren't+主语”;如果强调动作的完成(一般没有明确的过去时间状语),问句要用“haven't/hasn't+主语”。Shemusthavereadthenovellastweek,didn'tshe?她上星期一定读了这本小说,是吗?Youmusthavetoldheraboutit,haven'tyou?你一定把这事告诉她了,是吗?
吕艳辉回答:
  恕我愚昧,was‘t是最佳的吗?
彭潇回答:
  是的
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