2. 外语
  3. He must have been late for the conference yesterday, ______?

He must have been late for the conference yesterday, ______?

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问题 He must have been late for the conference yesterday, ______?
选项 A、didn’t he
B、haven’t he
C、mustn’t he
D、wasn’t he
答案D
解析 本题考查反意疑问句。情态动词表推测-后面的反意疑问句应该与实际时态一致。用must have done表示“对过去加以推测”时，其附加疑问部分要根据must后的动词形式和有无时间状语来确定时态。此句中动词是be，时间是yesterday，所以用wasn’t he。如果去掉yesterday，就应选B项。
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