情态动词+have_done 结构 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,译成“本来能够”做某事而没有做。 1. 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” 表示对过去发生的事情的推测,译成“可能已经”,用于肯定句中。 ——What has happened to George? ——I don't know. He may have got lost. ——乔治发生了什么事? ——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。译成“可能已经”,用于肯定句中。 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,,,”。 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...