1.must + have + PP 表示对过去肯定的推测,译为一定是,准是 The road is wet. It must have rained yesterday.
2.can + have + PP 表示对过去的推测(限于问句中) Can she have said so? 他可能这样说吗?
3.cant + have + PP 表示对过去的否定推测 He cannot have said such a foolish thing.
情态动词表推测的反意疑问句
情态动词表推测的反意疑问句,简单来说,就是以情态动词后的时态为淮,如句子里有明确的时间状语,则以其为准。以 must 为例:
eg. 1. You must be hungry now, arent you?
2. He must be watching TV , isnt he ?
3 Tom must have lived her for a long time, hasnt he ?
4. She must have arrived yesterday, didnt she?
注:如选择题中(以She must have arrived yesterday, didnt she?为例)既有didnt she又有hasnt she则以didnt she?为最佳答案。
情态动词
情态动词是高考的重点考查项目,对学习情态动词的要求是:
首先、了解情态动词各自的基本意义及用法,然后掌握情态动词表示推测的用法(其中重点是对表过去推测的用法)还要注意带有情态动词的反意疑问句的用法。
情态动词的特征:
1.本身有词义,但完全。因此不能独立作谓语,只能和动词原形一起构成谓语。
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2016-02-29
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