情态动词表 推测课件内容资料.ppt

ModalVerbs;must, can, could, will, would, may, might, should, ought to;情态动词 can, could, may,might,must表推测的用法： ;（2）must表推测只能用于肯定句。 如表示“一定不、肯定不”的意思时，改为否定用can`t, 如询问某种可能时，应用can。He must know my address. 他肯定知道我的地址。 （一定） He can`t know my address. 他肯定不知道我的地址。 （一定不）Can he know my address? 他知道我的地址吗？ （询问可能性）;（3）must表示推测时，可以推测现在/正在发生的动作 He must have a car now. （现在）他一定有辆小汽车。He must be doing his exercises in the classroom.（正在进行）他一定在教室里做练习。;2. can / could的用法（1）can表示推测“可能性”时，往往用于否定句或疑问句。Can`t“一定不”，can在疑问句中意思是“会、可能”。He can`t be at home. = It is impossible that he is at home. 他一定不在家。;（3）could 还可以用于表示客气、委婉、礼貌的请求语气。 Excuse me, could you tell me the way to the bus station?Could you help me? ;情态动词表推测的三种句式 ;;; Choose the best answers :1. I thought you______ like something to read. So I have brought you some books. A. ought B. might C. would D. must;2. –That man must be Sarah’s husband.--No, he_____ be her husband. She is still single.A. can’t B. mustn’t C. may not D. ought to 3. Peter _____come with us tonight, but he isn’t very sure.A. must B. may C. can D. will; 4. –What____ it be?--It______ be a mail box, for it is moving. It______ be a car.A. can; can’t; must B. can; can; mustC. can; mustn’t; must D. must; mustn’t; can 5. –Look, someone is coming. Guess__________ .--Jack. He’s always on time.A. who can it be B. who he mayC. who he can be D. who it can be;6. David, you _____play with the valuable bottle, you_______ break it.A. won’t; can’t B. mustn’t; mayC. shouldn’t; must D. can’t; shouldn’t;7. Sue________ come together with us tonight, but she isn`t very sure yet. A. must B. may C. need D. will