9 情态动词课件.pptVIP

策划：《学生双语报》 在疑问句中 Could 比can 更有礼貌，在此不是can的过去式。 Can you wait a moment please? Liz, can you do me a favor? Excuse me, could you tell me the way to the station? I wonder if you could help me. (请求) 4.May 表示许可，表示允许别人做某事， 也可征求对方的许可。 May I open the door? We may keep the book for two weeks. 5 用于祈使句，表示祝愿。 May you succeed! May you have a nice trip! Shall/should 1.shall 用于第二、三人称陈述句中，表示说话人给对方的命令，警告，允诺或威胁。 1)You shall go with me.(命令) 2)You shall have the book when I finish it.(允诺) 3)He shall be punished.(威胁) 2. shall用于第一、三人称疑问句中，表示说话人征求对方的意见和向对方请示。 4)Shall we begin our class?（征求意见） 5)When shall Mike be able to leave hospital?(请示) 3.用于条约，规定，规章等文件中，表示一种义务，多用于第三人称中。 6) “The interest ___be divided into five parts, according to the agreement made by both sides.” declared the judge. A. may B. should C. must D. shall a. should 用于表达合理推断。 It is three o’clock, the football game should begin now. Mary took dancing lessons for years, she should be an excellent dancer. shall , should ought to Shouldought to含义相近，都可表“责任，义务”常可互换。区别在于，ought to常指特殊情况下的“应当”。Should则指一般情况。 have to have to 表示客观需要去做的事情，意为“必须，不得不。” I have to get the station early to catch the first train. We missed the bus so we had to walk home. We have to overcome all kinds of difficulties. have to （考点） Have to 有多种时态。常见的有：一般将来时， We will have to gather at the school gate at 7 tomorrow. 一般现在时 I have to take more money with me because my wife has so much to buy. 一般过去时 Finally, we had to give up our idea to hold a picnic outside as it rained for a whole afternoon. dare need 　must have to 比较must have to must表主观意志，而have to表由于客观因素不得不做完成的事情。 Must没有过去式，除在间接引语中可表示过去的时间。在直接引语中表示过去的时间用had to代替。 I told her that she must give up smoking. She said, “We had to get everything ready that night.” Could I borrow your dictionary?(委婉) ---- Yes，you can/may. Sure. Go ahead. Please yourself. May I take this seat?(第一人称疑问句) Yes, you may. No, you mustn’t. Mus