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Unit 2 Let's Celebrate —Modals（2）教案 高中英语外研版（2019）必修第二册
课程基本信息
学科 英语 年级 高一 学期 秋季
课题 Unit 2 Let’s Celebrate—Modals（2）
教学目标
At the end of this class, students will be able to understand the modals (could, might and must) in context to indicate possibility; understand the differences between might / could and must in affirmative sentences in indicating possibility; understand the difference between might not and could not in indicating possibility; utilize the modals (could, might and must) in context to indicate possibility by inferences.
教学内容
教学重点： summarize that the modals (could, might and must) indicate possibility; understand the differences between might not and could not in indicating possibility. 教学难点： understand the differences between might not and could not in indicating possibility. utilize the modals (could, might and must) in context to indicate possibility by inferences.
教学过程
步骤教学活动设计意图Step 1 GuessT presents pictures about parts of a gift from Father Christmas and asks Ss to guess. T: Father Christmas sent us a gift, and let’s guess: what’s the gift T: Yes, the gift is a cat. ConversationsPicturesT: Can it be a doll S: No, it can't be a doll. It has brown hair, so it could be an animal. (a）T: Can it be a dog S: I'm not sure. It might not be a dog. It could be a cat as the animal's legs are so small. (b)T: Can it be a cat S: Yes, it must be a cat. Because I can see a cat's whiskers and I heard its meow. （c）
教师根据本单元“节日庆祝”主题，自制动画，简化语言学习内容，创设语法学习情境，让学生在主题语境下感知could、might、must的用法。Step 2 SummarizeT presents three questions from the textbook (p17), and asks Ss to think about them. 引导学生在语境中归纳情态动词表可能性的用法，并感知could、might、must的用法的差异，以及通过设问、对比，在情景中理解could 和might 在否定句中（could not 和 might not 的区别）1. What do the words could, might, must indicate an order B. a request C. ability D. possibility 2. Will the meaning of sentence (a) change if we replace “could” with “must” or “might” What happens if we change “must” and “might” in sentences (c) and (b) into “could” Summarize: 1. We use _______ to say that we feel sure something is true. 2. In affirmative sentences: We use may/might or can/could to say there is _________of something happening or being true. 3. In negative sentences (might not, can/could not): We use ________________to say that it is possible that something is not true. We use ________________to say that it is not possible that something is true. Step 3 Practice T guides Ss to practice the words by giving incomplete sentences and Ss need to complete them. Task: Look at the picture and complete the sentences using can / could, may / might and must. Example: The woman in red must be very excited to buy so many things. 1. The man with a wallet in his hand _______ be a bit unwilling to pay. 2. The woman with glasses _______ be very tired to get up so early and carry so many bags. 3. The cashier ________ be feeling uncomfortable as he is sweating a lot.通过观察图画，补全句子，练习、巩固情态动词表推测的用法。Homework (Page 17 on the textbook: Task 2) Rewrite the underlined sentences in the conversation using can/could, may/might and must. (At a fancy dress party.) Chris: I spent ages putting up all the balloons and flowers last night. Jean: I expect you are feeling tired now! Chris: Yes, I am. Look, that guy is dressed as Batman. Is that Mike Jean: It’s possibly him. Check out that girl over there dressed as a bridge. I’m sure that’s Lucy. Chris: No, I don’t think that’s Lucy. Lucy isn’t that tall. Jean: Look at those two guys dressed as chickens! Oh, they’re waving at us! Maybe they’re from our school. Chris: Let’s go and find out.巩固、迁移所学知识,在语境中运用情态动词表推测。
学习效果评价
In this class, I have learnt1We use the modals (could, might, must) to say there is a possibility of something happening or being true.2We understand there is often minor difference in meaning between might not and could not in indicating possibility: we use might not/may not to say that it is possible that something is not true, and could not/can not to say that it is not possible that something is true.3We indicate the possibility by using the modals (could, might, must) and support our inferences by giving evidence.

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