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单选题
You must have stayed up late last night, _____?
A
mustn’t you
B
don’t you
C
didn’t you
D
needn’t you
参考答案
参考解析
解析：
句意：你昨晚一定熬夜了，对吗？当陈述部分是must have done时，若强调对过去情况的推测(一般有过去时间状语)，反意疑问部分的谓语动词用didn’t＋主语；若前句强调动作的完成，疑问部分谓语动词用haven’t (hasn’t)＋主语。例如：He must have met him yesterday，didn’t he? You must have seen the film，haven’t you? 本句中有明显的时间状语last night，故选C。
句意：你昨晚一定熬夜了，对吗？当陈述部分是must have done时，若强调对过去情况的推测(一般有过去时间状语)，反意疑问部分的谓语动词用didn’t＋主语；若前句强调动作的完成，疑问部分谓语动词用haven’t (hasn’t)＋主语。例如：He must have met him yesterday，didn’t he? You must have seen the film，haven’t you? 本句中有明显的时间状语last night，故选C。
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