Unit 2 Let's Celebrate! Using language Grammar 情态动词课件-2024-2025学年高一英语外研版（2019）必修第二册

Unit 2 Let’s celebrate-Using Language 汇报人：Andy Step1. Fill in the blanks with appropriate words according to the text. 1.The letters were also beautifully-illustrated-each _______________(take) its true author, Tolkien, a long time to complete. 2. In another letter, Father Christmas complained about how he ____________ (stop) his helpers playing games with the toys instead of wrapping them up. 3. ... other characters at the North Pole, we ___________ (share) the true spirit of giving at Christmas time. 4. ... Tolkien ______________ (be) the real Father Christmas. must have taken coud not stop can share may have been 情态动词must, can, could, may, might等都有表推测的用法 Step 2 根据推测语气的强弱，选择情态动词 ①在肯定句中表推测:   must语气最强， 表示“肯定，一定”；could, may, might语气依次减弱，表示“可能， 也许” (1) You must tell me all about your new friend. (2) He could be at home. He may be at home. He might be at home. ②在否定句中表推测: can’t, couldn’t语气较强，表示“不可能”；may/might not语气较弱，表示“可能不”； (1) It can't snow in summer. (2) We might not go anywhere. ※mustn’t表示“禁止”，不用于否定推测。 You mustn't tell a lie to parents. ③在疑问句中表推测: 疑问句中用can/could（能……？），could语气更加委婉不确定。 (1) Could he have finished the task? (2) Can he be at home now? 情态动词表推测的三种时态 ①“情态动词+be/be doing/动词原形”表达对现在情况或此时此刻正在发生的事情的推测。 (1) He can't be at home at this time.(= I don't think he is at home at this time.) (2) They may not be having fun.(= I don't think they are having fun.) (3) He must work very hard. (= I'm sure he generally works very hard.) ②“情态动词+have +V-ed”表达对过去情况的推测。 (1) They may/might have got lost. (2) Emma must have been very upset. (3) He can't have left so soon. ③“情态动词+动词原形”表达对将来情况的推测。 (1) She must arrive before 5.(= I'm sure she will arrive before 5.) (2) She may walk miles and miles among the hills without meeting anyone. (= It's probable that she walk miles and miles among the hills without meeting anyone. ) 情态动词表推测时的反意疑问句、附加疑问句部分一般不再用情态动词表示推测语气。而是根据情态动词之后的动词及时间状语或上下文确定具体形式。 (1) That girl must be your sister, isn’t she? (2) He must have left yesterday, didn’t he? WPS,a click to unlimited possibilities Let’s practice! YOUR LOGO You must be feeling tired now. It may/might/could be him. That must be Lucy! That can’t be Lucy. They may/might/could be from our school. Rewrite the underlined sentences in the conversation using can/could, may/might and must The woman in red must be very excited to buy so many things. The man with a wallet in his hand might be a bit reluctant to pay. The woman with glasses may be very tired to get up so early and carry so many bags. The cashier might be feeling uncomfortable as he is sweating a lot. Thank you $$