情態(tài)動詞need用法匯總-資料下載頁
2025-06-17 04:10本頁面
【正文】 n killed. 我如不是警告了你，你就可能喪命了。If you had e sooner, you could have helped us. 你如早來一點(diǎn)，就會幫上我們了。If he had known the facts, he could have told us what to do. 如果他了解事實(shí)，他是可能告訴我們怎樣做的。If anybody had asked me, I could have told them what happened. 如果有誰問過我，我可以告訴他們發(fā)生了什么情況。十、用于某些口語慣用表達(dá)可用于某些口語慣用表達(dá)，如用于I could have sworn…，其意是“我可以發(fā)誓”“我千真萬確”。如：I could have sworn I’d paid that bill. 我可以發(fā)誓我付過賬。 I could have sworn I heard a knock at the door. 我千真萬確聽到了敲門聲。l情態(tài)動詞+have+done是重點(diǎn)和難點(diǎn)之一，現(xiàn)將其用法總結(jié)歸納如下： 一、 “must+have+done”表示對過去事情的肯定推測，譯成“一定做過某事”，該結(jié)構(gòu)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?yàn)榈孛孢€是濕的。2. You must have been mad to speak to the servant. 你和仆人說話，一定是發(fā)瘋了。二、 “can39。t+have+done”表示對過去事情的否定推測，譯成“不可能做過某事”。1. Mr. Smith can39。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，我剛才還在圖書館見過他。2. Mary can39。t have stolen your money. She has gone home. 瑪麗不可能偷你的錢，她回家去了。三、 “can+have+done”表示對過去行為的懷疑，用于疑問句，譯成“可能做過……嗎？”。1. There is no light in the room. Can they have gone out? 屋里沒有燈，他們可能出去了嗎？2. There is nowhere to find them. Where can they have gone? 到處找不到他們，他們可能到什么地方去呢？四、 “could+have+done”是虛擬語氣，表示對過去事情的假設(shè)，意思是本來能夠做某事而沒有做。He could have passed the exam, but he was too careless. 本來他能夠通過考試，但是他太粗心。五、 “may+have+done”表示對發(fā)生過的事情的推測，意思是“可能已經(jīng)”或“也許已經(jīng)”，用于肯定句中?！猈hat has happened to George?—I don39。t know. He may have got lost.—喬治發(fā)生了什么事？——我不知道，他可能迷路了。六、 “might+have+done”表示對過去事情的推測，might與may意思相同，但可能性更小。多用于虛擬語氣結(jié)構(gòu)中。1. He might have given you more help, even though he was busy. (MET90) 他或許會多給你一些幫助，即使他很忙。2. She might have achieved greater progress, if you had given her more chances. 如果你多給她點(diǎn)機(jī)會，她可能已經(jīng)取得更大的成績。七、 “would+have+done”虛擬語氣，表示對過去事情的假設(shè)，意思是“本來會做”。1. I would have told you all about the boy39。s story, but you didn39。t ask me. 我本來會告訴你這個(gè)小男孩的故事，但是你沒有問我。2. Without your help, I wouldn39。t have achieved so much. 沒有你的幫助，我是不會取得如此大的成績。八、 “should+have+done”意思是“本來應(yīng)該做某事，而實(shí)際沒做?！?“shouldn39。t+have+done”表示本來不應(yīng)該做某事，而實(shí)際做了。含有指責(zé)對方或自責(zé)的含意。1. Tom, you are too lazy. The work should have been finished yesterday. 湯姆，你太懶惰了，這項(xiàng)工作本來應(yīng)該昨天就做完的。2. Look, Tom is crying. I shouldn39。t have been so harsh on him. 看，湯姆哭了，我本來不應(yīng)該對他如此嚴(yán)厲。3 you should have told me 你早就應(yīng)該告訴我九、 “ought to+have+done”表示過去應(yīng)該做而實(shí)際并沒有做，譯成“理應(yīng)做……”，往往表示遺憾。與“should+have+done”用法基本一樣。I ought to have gone home last Sunday. 我理應(yīng)上星期日回家。You ought not to have given him more help. 你不應(yīng)該幫助他那么多。十、 “need+have+done”表示本來需要做某事而沒有做?！皀eedn39。t+have+done”則表示“本來不需要做某事而做了”。I needn39。t have bought so much wine—only five people came. 我本來沒有必要買這么多酒，只來了五個(gè)人。He need have hurried to the station. In that case, be wouldn39。t have missed the train. 他本來需要快點(diǎn)去車站，那樣的話，他就不會誤了火車。you need not have said that你沒必要這么說would like to have done sth 本打算做某事I would like to have read the article, but I was very busy then.would rather +have done 當(dāng)時(shí)寧愿做了 或沒做I would rather have refuse his offerYou should have told me so before.你早就應(yīng)該告訴我。
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