高中英语破题致胜微方法（虚拟语气2）：2．情态动词的虚拟用法

每个情态动词都有很多的意思和不同的用法，除了它们的基本用法之外，有些情态动词还具有一个相同的用法——表示与所说的事实相反，即虚拟用法。本节课老师就和同学们一起来看看这几个情态动词的虚拟用法。 下面这些情态动词后面接have done, 表达的是一种与事实相反的意思。 一. 结构和含义 1. should have done sth. 本应该做某事（但实际上未做） ought to have done sth. shouldn't have done sth. 本不该做某事（但实际上却做了） oughtn't to have done sth. There was a lot of fun at yesterday’s party. You should/ought to have come, but why didin’t you? 昨天的舞会非常有趣。你本应该来的，但是你为什么没来呢？ I tried to play with a bad injury and I shouldn't have done that. 我曾经尝试着带着严重的伤势去比赛，我当初真不该那么干。 She ought to have seen a doctor about her headache a week ago. 她本应一周前去看头痛病的。 You ought not to have taken the book out of the reading-room. 你本不应该把书带出阅览室。 2. could/might have done sth. 本可以做某事（但实际上未做） I could have been a doctor, I could have been a lawyer, but I choose to be a teacher. 我本可以成为一名医生，本可以成为一名律师，但我选择了做一名教师。 If he had taken the doctor's advice, he might have already recovered from his illness. 如果他听从了医生的建议的话，他的病可能已经好了。 3.needn’t have done sth. 过去本来没有必要做某事（但实际上却做了） I dressed very warm