情态动词表推测的反义疑问句

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情态动词表推测的反义疑问句情态动词表推测的反义疑问句情态动词表推测的反义疑问句情态动词表推测时,该句的反义疑问句和情态动词无关,必须去掉该情态动词后,考虑句子谓语动词的发生时间和谓语构成,再进行相应的

情态动词表推测的反义疑问句
情态动词表推测的反义疑问句

情态动词表推测的反义疑问句
情态动词表推测时,该句的反义疑问句和情态动词无关,必须去掉该情态动词后,考虑句子谓语动词的发生时间和谓语构成,再进行相应的变化.
如:
1.It must have rained last night,didn't it?
去掉must后,考虑时间状语last night,说明句子本该使用一般过去时,即变成:It rained last night,所以其反义疑问句为didn't it?
再如:
2.You can't have been to Beijing before,have you?
去掉can't后,根据句意,句子本该使用现在完成时,即变成:You haven't been to Beijing before,所以其反义疑问句为have you?