情态动词专题语法课件-2024届高三英语二轮复习

情态动词 Sarah Chen 动词分类 情态动词 表示说话人对某一动作或状态的态度，认为“可能、应当、必要”等等，但本身意义不完全，不能单独作谓语，必须和其他动词一起构成谓语 没有人称和数的变化。 后面跟动词原形 ought, used, have后跟不定式 情态动词 表示推测，可能性 情态动词 肯定式 否定式 疑问式 must 必定、必然 He has a house in Beijing and another in Shanghai ,so he must be rich. / / will 很可能、大概 He will be expecting a call from you. 不会、不该 It’s no use asking Tom,he won’t know. 会…吗？ Will Bill be at the club now, do you think? would 可能性比will小 He would be expecting a call from you. 语气比won’t弱 It’s no use asking Tom,he wouldn’t know. 语气比will弱 Would Bill be at the club now, do you think? should 确定或可能有的或期待 The plane should be landing now. / / ought to 应该、理应（含义同should） The plane ought to be landing now. / / 情态动词 表示推测，可能性 情态动词 肯定式 否定式 疑问式 can / 不可能 He can’t be driving the car himself. 有可能吗？ Can he be driving the car himself? could 可能 He could be in the library.. 不可能 He couldn’t be driving the car himself. 语气比can弱 Could he be driving the car himself? may 或许、也许、也未可知、也说不定 Tom may lend you the money. 可能不 He may not believe your story. / might 比may弱 Tom might lend you the money. 比may not弱 He might not believe your story. / 情态动词 表示某一特定的语气 1、can用于否定句、疑问句和感叹句中，表惊异怀疑、不相信等态度。 Where can they be now? What can he mean? 2、must表示与说话人愿望相反及不耐烦，意为：偏要。 Why must it rain on Sunday? 3、may表祝愿（不能用might）。 May all our dreams come true. May that day come soon. 4、should与why, who, how 等连用, 表示说话人对某事不理解、感到意外、惊异等意思，意为：竟会。 Why should you be so late today? I don’t know why you should think that I did it. 情态动词 情态动词表示委婉地语气 1、can和could 表比较委婉客气地提出请求。这时could和can没有时间上的差别，只不过用could比用can显得更加委婉客气。 -Could /Might I borrow your dictionary? -Yes, of course you can/may. - No, I’m afraid not. 注意：回答允许时肯定的回答用can，不能用could/might。 情态动词 情态动词表示委婉地语气 2、may和might表示许可或征询对方许可。 May I watch TV after supper? He said that I might use the telephone. 注意：征询许可时，might比may更恭敬有礼。may的否定形式为may not，但表示“不可以”、“阻止”等意思时常用must not(musn't)代替may not。 3、should用于使一个直接或直率的陈述变得婉转、谦逊，意为：可以, 倒是。 I should think he would like to go. I should hardly think so. You are mistaken, I sh