情态动词+have done课件-2024届高三英语一轮复习

“情态动词+have done'”的用法 omD/8dj代Ao元 “must+have+done' 表示对过去事情的肯定推测，译成“一定做过 某事松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。 rom..com “can'f+have+dne 表示对过去事情的否定推测，译成“不可能做过某 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。 rom hitpoww.cfy.com “can+have+ddne 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? 屋里没有灯，他们可能出去了吗？ 1 2.There is nowhere to find them. Where can they have gone? 到处找不到他们，他们可能到什地方去 呢？ rom hitpww.efy.com 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。 omin/8Cj0Ao7元 五s“may+have+dne 表示对发生过的事情的推测，意思是“可能 已经”或他许已经”，用于肯定句中。 .-What has happened to George? .-I don't know.He may have got lost. ·一乔治发生了什么事？ 我不知道，他可能迷路 了。 rom httpRoww.cfy.com 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.(MET90) ●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. 如果你多给她点机会，她可能已经取得更大的成 绩。 com hitpoww.cfy.com “would+have+done 虚拟语气，表示对过去事情的假设，意思 是“本来会” 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。 “should+have+done 意思是“本来应该做某事，而实际没做。 “shouldn'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+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. 你不玄超助他那，多 rom hitpRvww.cfly.com