新课标必修三Unit 1 情态动词语法及练习(5)

非常不错的情态动词课件,很到位,符合任何高中学生使用

(3) guess :很有可能，也许 具体情况 a) can(具体某次猜测):否/问 (平时或者理论上的可能):肯 ---Can she be in the classroom ? ---No,she can`t (不可能) be in it. 100%的否定 Running on the icy road,cars can have accidents. b)could:肯，否，问(可能性比can小)Mary could be at home . She couldn’t (很可能没)be telling lies. 非100%的否定

c)对过去已经发生的事情进行猜测 can have done sth 否/问 could have done sth 否/问/肯Why did you throw the bottle out of the window? It could have hurt somebody.(肯定句)

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