高一英语暑假专题复习情态动词1. 情态动词的推测表达2. 情态动词表达虚拟语气3. 某些情态动词的特殊用法知识重点与难点总结知识重点：情态动词在表达推测意义的句子中的运用：（一）用情态动词表达事实的推测。can，could，might，may，must 可以用来表达对事实的推测。根据说话人对事实的把握性大小，must 表示“肯定…”，may / might / can / could表示“可能……”， must 只用于肯定句中，may / might 的否定式 may not / might not 表示 “可能不……”, 而 can / could 可以用于疑问句，表示“可能，可能……吗?”，其否定式 can’t / couldn’t 表示“不可能”。用情态动词可以对现在或过去的事实进行推测。对不同的时间内容推测有不同的结构。（二）对现在的事实进行推测：主要结构：…must / may / might +动词原形 be+名词/形容词/介词短语 be + doing例句：1. You must be Jeanne. I’m Mathilde Loisel. We used to know each other very well. 2. They must be in bed already at this time of the night.3. The teacher must be joking.4. Freda isn’t in class. She must be sick.5. There must be something wrong.6. She might be very clever, but she hasn’t got much common sense.7. He may be arriving this evening.8. He may be traveling around the world.9. The keys can’t be in the room. I have just searched it very carefully.10. Can the news be true ?（三）对过去的事实进行推测：结构：情态动词+have done / been+ 名词 / 形容词 / 介词短语 例句：1. Mrs. Longmans must have been a pretty girl in her youth.2. He couldn’t have seen Anna yesterday. She’s gone abroad.3. I think I must have left my glasses in the library.4. He might have overslept again.5. Where can Tom have gone ?情态动词表达虚拟语气：表达“本来…”，“不然早就…”。这是情态动词的一种虚拟语气用法。表示说话人所讲的与所发生的事实相反。表达了说话人的埋怨，后悔的语气。其结构是在一些情态动词后面加 have done 结构。根据要表达的意思，有如下结构：should have done / ought to have done：本应该...
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