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【正文】 ’t have done表示本不該干某事而干了 。 (表意愿) (表許可) shall和 should: 1. Perhaps I shall pay a visit to England this 。t you sit down? 請(qǐng)坐下,好嗎? 疑問(wèn)句中用于第二人稱,提出請(qǐng)求 3. _____________________________________ Fish will die out of water. When I was at school, I would ask such questions. 表示習(xí)慣和傾向性 “總是” 4. _________________________ Would you help us, please? 請(qǐng)您幫助我們,好嗎? Yes , I will. 好的,我愿意。m here? 請(qǐng)您告訴她說(shuō)我在這兒,好嗎 ? (助動(dòng)詞) (情態(tài)動(dòng)詞) will是助動(dòng)詞或是情態(tài)動(dòng)詞 用于構(gòu)成將來(lái)時(shí)是助動(dòng)詞。t /couldn’t have gone out because the light is still on. Can (Could) he have heard the news? can /could have done 過(guò)去否定或疑問(wèn)的猜測(cè) Given more time, I could have done it even better. I could have lent him money, but he didn’t ask me. could have done 表示虛擬語(yǔ)氣,用于肯定句。 2. 適用于主語(yǔ)的各種人稱和數(shù) ( have to 例外 ) 3. 后面接動(dòng)詞原形,即不帶 to 的不定式 ( have to , used to , ought to 本身帶有 to ) 4. 具有助動(dòng)詞的作用, 既可用來(lái)構(gòu)成否定句 疑問(wèn)句及簡(jiǎn)明答語(yǔ)。Modal Verbs 情態(tài)動(dòng)詞 情態(tài)動(dòng)詞用來(lái)表示說(shuō)話人對(duì)一個(gè)動(dòng)作或狀態(tài) 的 看法 , 態(tài)度 或者說(shuō)話人的 情感 。 情態(tài)動(dòng)詞用法的特征: 1. 有一定的詞義,但不能單獨(dú)使用作謂語(yǔ)。 . The man still was able to get to the village though there was so much trouble. E. _____________: eg. Can the news be true? It can’t be true. 表示推測(cè)可能性 只用于疑問(wèn)句和 否定句 2) could的主要用法是: A. ______________________________ ____________________: eg. We all knew that the young man couldn’t be a doctor. could 是 can的過(guò)去式 , 表示過(guò)去 的能力和推測(cè) B. could可代替 can表示請(qǐng)求 , 語(yǔ)氣委婉 eg. Could I use your bike? Yes, you can. C. ________________________________________
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