【高二英语】语法：情态动词讲解_高中英语语法

　　2. 表示意志、愿望和决心。

　　I will never do that again.

　　They asked us if we would do that again.

　　3. 用will be和will have done的结构表示推测，主要用于二、三人称，前者表示对目前的情况的推测，后者表示对已经完成的动作或事态的推测。

　　This will be the book you want.

　　He will have arrived by now.

　　4. would可表示过去反复发生的动作或某种倾向，表示过去习惯时比used to正式，同时它没有现在已无此习惯的含义。

　　I would visit him during my vacation.

　　The patient would not recover.

　　5. 表示料想或猜想。

　　He would be your new teacher.

　　He would not come any more.

　　七. ought to的用法。

　　1. ought to表示应该时意义与should基本一致，但更侧重于一种义务或责任。

　　You ought to take care of him.

　　Parents ought to bring up their children.

　　2. 表示推测，注意与must表示推测时的区别。

　　He must be home by now.

　　He ought to be home by now.

　　This is where she must be.

　　This is where she ought to be.

　　3. ought to have done的用法与should have done的用法相同

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