Unit 2 Let's Celebrate! Using language 情态动词学案-2022-2023学年高中英语外研版（2019）必修第二册

Topic：Unit 2 Let's celebrate! Type of lesson：Using LanguagePrepared by：Bobo Yuan Checked by：Candy Li Taught by： Time： Goals：1.To master the basic usage of modal verbs 2.To understand “Black Friday” and broaden your knowledge.3.To summarize the expressions of various celebrations during the festival,and learn to describe the festival.4.To send and accept invitations politely.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.Step2.Focus on基本用法：情态动词表推测:情态动词must, can, could, may, might等都有表推测的用法，都可以对_____，______或_______的情况是否发生做出语气______不同的推测。1.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. 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”； He might be at home. (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。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。You mustn't tell a lie to parents. (1) Could he have finished the task?(2) Can he be at home now?2.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.(4) You could have helped me, but why did you just sit and watch?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?高考链接1.（2019 天津卷）My wallet was gone. ____________________________________________________________________.（我只可能把它落在了G9公共汽车上。）2.（2018北京卷）In today's information age, the loss of data ____ cause serious problems for a company.A. need B. should C. can D. must3. （2018天津卷）I can't find my purse. I ___ it in the supermarket yesterday, but I'm not sure.A. should leave B. must have left C. might leave D. could have leftⅠ. 用适当的情态动词完成下列对话。1. — Are you going to his birthday party tomorrow morning? — I'm not sure. I ___________________ go to visit Professor Yang. 2. — Did the girl win first prize in the contest? — Yes, she did. She answered all the questions correctly. She _________ have made full preparations. 3. — Is that Nancy? — No, it _________ be her. She has gone to Paris for her holiday. — You _________ finish your task today. I mean you can't put it off until tomorrow. — OK. I'll do it at once. 5. — Excuse me, _________ you tell me how I can get to the railway station? — Certainly. Go straight ahead and you will see it on your left. You _________ miss it.II.根据所给汉语提示完成下列句子, 每空一词。1. 你哥哥不可能已经找到他的车，因为今天早上他是坐公共汽车来上班的。Your brother ______ _____ ______ his car, for he came to work by bus this morning.2. 约翰，你一定不要玩刀子，你会伤害自己的。John, you ________ play with the knife, you __________ hurt yourself. 3. 那天你在森林里迷路了，一定很害怕吧。When you got lost in the forest you _____ _____ _____ very frightened. 4. 我没有赶上早班车，他们一定等我等得不耐烦了。I haven’t caught the early bus. They _____ ___ ______ for me impatiently.5. I don't know where she is, she _____ ___________ (可能在武汉).6. At this moment, our teacher_______________ (想必在批改) our exam papers.7. The road is wet. It ________________ (肯定下雨了) last night. 8. Your mother ___________________________ (一定一直在找你).教师“复备”栏或学生质疑、总结栏