含有情态动词的虚拟语气

1、“ would+have+done虚”拟语气，表示对过去事情的假设，意思是“本来会做 ”1. I would have told you all about the boy's story, but you didn't ask me. 我本来会告诉你这个小男孩的故事， 但是你没有问我。2. Without your help, I wouldn't have achieved so much.没有你的帮助，我是不会取得如此大的成绩。“ could+have+done是”虚拟语气，表示对过去事情的假设，意思是本来能够做某事而没有做。He could have passe

2、d the exam, but he was too careless. 本来他能够通过考试，但是他太粗心。请看相关知识点：一、“must+have+done”表示对过去事情的肯定推测，译成“一定做过某事 ”，该结构只用于肯定句。1. It must have rained last night, for the ground is wet. 昨晚一定下雨了，因为地面还是湿的。2. You must have been mad to speak to the servant. 你和仆人说话，一定是发疯了。二、“can't+have+done表”示对过去事情的否定推测，译成“不可能做过某

3、事 ”。1. Mr. Smith can't have gone to Beijing, for I saw him in the library just now. 史密斯先生不可能去北京了， 我刚才还在图书馆见过他。2. Mary can't have stolen your money. She has gone home. 玛丽不可能偷你的钱，她回家去了。三、“can+have+done”表示对过去行为的怀疑，用于疑问句，译成“可能做过 吗？ ”。1. There is no light in the room. Can they have gone out? 屋里没有

4、灯，他们可能出去了吗？2. There is nowhere to find them. Where can they have gone? 到处找不到他们，他们可能到什么地方去呢？四、“could+have+done是”虚拟语气，表示对过去事情的假设，意思是本来能够做某事而没有做。He could have passed the exam, but he was too careless. 本来他能够通过考试，但是他太粗心。五、“may+have+done”表示对发生过的事情的推测，意思是“可能已经 ”或 “也许已经 ”，用于肯定句中。What has happened to George?

5、I don't know. He may have got lost.乔治发生了什么事？精选文库 我不知道，他可能迷路了。六、 “might+have+done”表示对过去事情的推测， might 与 may 意思相同，但可能性更小。多用于虚拟语气结构中。1. He might have given you more help, even though he was busy. 他或许会多给你一些帮助，即使他很忙。2. She might have achieved greater progress, if you had given her more chances. 如果你多给她点

6、机会，她可能已经取得更大的成绩。七、“would+have+done”虚拟语气，表示对过去事情的假设，意思是“本来会做 ”。1. I would have told you all about the boy's story, but you didn't ask me. 我本来会告诉你这个小男孩的故事， 但是你没有问我。2. Without your help, I wouldn't have achieved so much.没有你的帮助，我是不会取得如此大的成绩。八、 “should+have+done意”思是 “本来 应该做某事，而实际没做。 ” “should

7、n't+have+done表示”本来不应该做某事，而实际做了。含有指责对方或自责的含意。1. Tom, you are too lazy. The work should have been finished yesterday. 汤姆，你太懒惰了， 这项工作本来应该昨天就做完的。2. Look, Tom is crying. I shouldn't have been so harsh on him. 看，汤姆哭了，我本来不应该对他如此严厉。九、“ought to+have+done”表示过去应该做而实际并没有做，译成“理应做 ”，往往表示遗憾。与“ should+have+

8、done用”法基本一样。I ought to have gone home last Sunday. 我理应上星期日回家。You ought not to have given him more help.你不应该帮助他那么多。十、 “need+have+done”表示本来需要做某事而没有做。“needn't+have+done则”表示 “本来不需要做某事而做了”。I needn't have bought so much wineonly five people came.我本来没有必要买这么多酒，只来了五个人。He need have hurried to the stat

9、ion. In that case, be wouldn't have missed the train. 他本来需要快点去车站，那样的话，他就不会误了火车。would like to have done sth本打算做某事-2精选文库I would like to have read the article, but I was very busy then.would rather +have done 当时宁愿做了或没做I would rather have refuse his offerwhere 一般等于 “介词 + which ”，你把定语从句从句部分还原成正常的句子， 看是否需要加介词，如果需要加介词，那么用 where 或介词 +which （这里不能用 that ）都可以，如果不需要加介词，就直接用 which 或 that ，不能用 where ，例如：this is the house in which/where i lived last year，这个句子中还原为i lived thehouse 是不行的，缺了一个 in，应该为 i lived in the h