作业帮The lazy boy must have been dismissed last week,( ) he?A.has
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The lazy boy must have been dismissed last week,( ) he?A.hasn't B.haven't C.doesn't D.didn't
到底选哪个?
到底选哪个?
答案选D.didn't
反意疑问句,从last week 可以判断这里只有D.didn't正确
再问： 最佳答案是was't 吗
再答： 当must+have done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”。 She must have read the novel last week,didn't she? 她上星期一定读了这本小说，是吗？ You must have told her about it,haven't you? 你一定把这事告诉她了，是吗？
再问： 恕我愚昧，was‘t是最佳的吗？
再答： 是的
反意疑问句,从last week 可以判断这里只有D.didn't正确
再问： 最佳答案是was't 吗
再答： 当must+have done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”。 She must have read the novel last week,didn't she? 她上星期一定读了这本小说，是吗？ You must have told her about it,haven't you? 你一定把这事告诉她了，是吗？
再问： 恕我愚昧，was‘t是最佳的吗？
再答： 是的
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