模块5语法复习-情态动词-虚拟语气31.ppt

模块5语法复习情态动词虚拟语气  1 . 表示能力： can, be able to 2 .表示推测（可能） 理论上的可能：can, 肯定句和疑问句中 具体事情实际发生的可能：may, might 肯定句，否定句 表示推测（一定） Must 一定是 Can’t 一定不是 可能性由小到大：Can’t---may/might not—might-may-could- can—must 3. 表示请求、允许、允诺 Can/could I ….? May/might I …? Shall I …? Shall he.. 征求决策者命令、警告、允诺或威胁 P89 He/you shall… 4．表示必要性 Need to / don’t need to Needn’t Must Mustn’t Should 5. 宁愿做某事 Would rather do sth Would rather do sth than do sth Would do sth. rather than do sth. Would rather sb. did sth Prefer to do sth. Prefer to do sth. rather than do sth. Prefer doing to doing sth. 6. 情态动词对过去情况的推测 Can’t/couldn’t have done- may/might have done must have done Needn’t have done should have done Shouldn’t have done can have done 7. 情态动词的其他用法 1） can’t but do 不得不，只好 2） May well/ may as well do sth. 完全能，很可能 3）May you succeed. 感叹句 4）Should +表示惊讶 对某事不理解，感到意外、惊讶等 How ____ a gentle like him be so unfriendly to a woman! 8．Need, dare 情态动词和实意动词用法 他需要马上就走。 他不需要马上就走。 他不敢马上就走。 He needs to go at once. Does he need to go at once? He doesn’t need to go at once. He needn’t go at once. He doesn’t dare to go at once. He dare not go at once. was /were able to=managed to do sth. succeeded in doing sth 基本用法辨析： 过去成功地做成某事 could 过去有能力但不一定做成某事 13.They met with a serious flood but in the end everyone ______ escape from the area. A. had to B. would C. could D. was able to D 14.She ______ out alone at night. A. dare not to go B. dares not go C. doesn’t dare to go D. doesn’t dares go C 15.Shut your mouth. Nothing ____ stop me once I have made up my mind. A. will B. ought to C. shall D. must C 16. If you ______ wait over there for a moment, Mr. Smith, I’ll tell our manager you’ve arrived. A. will B. must C. should D. might A 17 .--- Do you think he’ll do me a favor? --- It’s very unlikely, but he