would+have+done虚拟语气（会+已经虚拟语气）.doc

would+have+done虚拟语气（会+已经虚拟语气） The subjunctive mood of would+have+done indicates the hypothesis of what happened in the past, which means that it would have been done. 1., I, would, have, told, you, all, about, the, boys, story, but, you, didnt, ask, me., I would have told you the story of the little boy, but you didnt ask me. 2., Without, your, help, I, wouldnt, have, achieved, so, much., without your help, I wouldnt have achieved so much. Could+have+done is the subjunctive mood, which means the assumption of something in the past. It means that you could have done something without doing it. He could, have, passed, the, exam, but, he, was, too, careless., he could have passed the exam, but he was too careless. Please look at the relevant knowledge: First, must+have+done means the affirmation of the past, and the inference is something must have been done. The structure is used only in affirmative sentences. 1., It, must, have, rained, last, night, for, the, ground, is, wet.. It must have rained last night, for the ground is still wet. 2., You, must, have, been, mad, servant., to, speak, to, the, you must have gone crazy talking to your servant. Two, cant+have+done means negative speculation about what happened in the past. 1., Mr., Smith, cant, have, gone, to, Beijing, for, I, saw,, him, in, the, library, just, now., Mr. Smith could not have gone to Hong Kong. I saw him in the library just now. Marie Mary cant have stolen your money. She has gone home. can not steal your money, she went home. Three, can+have+done means the suspicion of past actions, which is used in interrogative sentences...... Is that right?. 1., There, is, no, light, in, the, room., Can,, they, have, gone, out? There is no light in the house. May they go out? 2., There, is, nowhere, to, find, them., Where, can, they, have, gone? They are nowhere to be found. Where can they go? Four, could+have+done is the subjunctive mood, which means the assumption of something in the past. It means that you co