1、Section A 3 (Grammar Focus-4c) 一、教学目标： 1. 语言知识目标：1) 学习掌握下列词汇：laboratory, outdoors, coat, sleepy 2）进行一步复习巩固学习Section A 部分所学的生词和词组。3）掌握情态动词的用法和物体所属的句型。2. 情感态度价值观目标：面对身边暂时不可解释的现象，根据已有证据进行合理推测。不信谣，不传谣。 二、教学重难点1. 教学重点：1) 复习巩固Section A 部分所学的生词和词组，达到熟练运用的目标。2) 总结情态动词的用法。2. 教学难点：1) 学习运用情态动词的用法。2) 掌握物体所属的句型。
2、三、教学过程. Revision Review some main phrases and sentences we learned in the last class. Grammar FocusFill in the blanks.1. 这是谁的排球?_ _ is this? 这一定是卡拉的。她热爱排球运动。It _ be _. She loves volleyball.2. 这是谁的发带？_ _ is this?它可能是梅的发带。或者可能属于琳达。她们两人都是长头发。It _ be Meis hair band. Or it _ belong to Linda. They_ have l
3、ong hair.3. 那晚你看见了什么？_ did you see that night?我不确定，但肯定不可能是狗。它更大。我想也许是一头熊或一匹狼。Im _ _, but it _ _a dog.It was bigger. I think it _ _ a bear or a wolf. Try to Find 情态动词表推测，可能性：must can/could may/might一、must表示可能性最大的肯定推测，意思是“一定、准是”。只能用于肯定句。如果要表示“一定不”，应该用cant。如果询问可能性时，应该用can。e.g. He must know the answers.
4、 他肯定知道答案。He cant know the answers. 他肯定不知道答案Can he know the answer? 他知道答案吗？二、can/couldcan表示推测“可能性”时，一般用于否定句或疑问句。can在疑问句中意思是“会，可能”。e.g. He cant pick her schoolbag up. 他不可能拿了她的书包。could 用于表示某事有可能发生或可能是事实。e.g. Dont eat it. It could go bad. 不要吃它，可能坏了。The plane could be put off by the storm. 这趟飞机可能会因为暴风雨而推
5、迟。could可用于表示客气、礼貌、委婉的请求语气。Could you please help me with my homework？你能帮我完成我的家庭作业吗？三、may/mightmay, might表示推测“可能性”时，意思是“可能”，“也许”。might不表示过去时态，语气更委婉，可能性更小。may, might表推测时，可用于否定句，但不用于疑问句。e.g. He may/ might not be at home, but Im not sure. 他可能不在家，不过我也不确定。四、推测时态1. must: 推测现在/ 正在/ 过去发生的动作。e.g. He must have
6、a car now. (现在) 他一定有一辆小汽车。 He must be finishing his homework at home. (正在进行) 他一定在家做作业。 He must have finished the work. (过去) 他一定已完成了工作。2. cancan/ cant 后可接进行时/完成时，表示对现在发生的动作或过去发生的动作进行推测。e.g. They cant be reading in the library. 他们一定不在图书馆读书。 He cant have gone to Shanghai because I saw him just now. 他不可
7、能去了上海，我刚看见他了。3. may/ mightmay，might 可以推测现在正在发生的动作或过去发生的动作，还可以推测将来的情况。e.g. He may/might be sleeping now. (现在) 他可能正在睡觉。 These people may/might have seen the film before. (过去) 这些人以前可能看过这部电影。 It may rain. There are some clouds. (将来) 可能会下雨。因为有一些乌云。. ExercisesChoose the correct answer.1. Excuse me. Is thi
8、s the right way to the Summer Palace? Sorry, I am not sure. It _ be.A. might B. will C. must D. can2. Isnt that Anns husband over there? No, it _ be him. Im sure he doesnt wear glasses.A. cant B. must not C. wont D. may not3. You _ be tired. Youve only been working for an hour. A. must not B. wont C
9、. cant D. may not4. Is John coming by train?He should, but he _ not. He likes driving his car. A. must B. can C. need D. may. Practice Work on 4a. Choose the best way to complete each sentence using the words in brackets.1.让学生们理解句子意思。 1. A: Wheres Jean? B: Im not sure. She _ (is/ might be/ must be)
10、in the laboratory. 2. A: Everyone is going to the pool after school. B: Really? It _ (must be / cant be /could be) hot outdoors. 3. A: Thats the phone. B: Hmm. I wonder who it _ (must be / could be / should be). 4. A: I wonder if these are Jims glasses. B: They _ (cant be / might be / could be) his.
11、 He doesnt wear glasses. 5. A: I hear water running in the bathroom. B: It _ (could be / must be / cant be) Carla. She was thinking of taking a shower.2. 根据句意选择正确的情态动词。3. 最后，通读一遍句子，进行综合理解，看句子内容是否通顺、合理。4. Check the answers with the students. Keys: might be, must be, could be, cant be, must be5. Expla
12、nation. (1) be sure (of/about sth/doing) 确信.，对.有把握be sure to do sth “ 必定” ，“ 必然会”, 准会 (2) 表示“位移”的动词用现在进行时态表将来，例如：go去，come来，leave离开，arrive到达，return 回来，fly 飞。 (3) wonder v. “想知道”（want to know）No wonder + 句子 “难怪.”e.g. No wonder you are angry. 难怪你觉得生气。 (4) think of 想要；打算e.g. I thought of playing basketb
13、all. 我想打篮球。Work on 4b. Complete these responses.1. Tell students to understand the sentences. 1. A: Many people are wearing coats. B: The weather must be _.2. A: Sally has been coughing a lot. B: She might be _. 3. A: This restaurant is always very crowded. B: The food _.4. A: Whenever I try to read
14、 this book, I feel sleepy. B: It cant _.2. Let students write down possible answers as much as possible.3. Let students check their answers with their partners.4. Check the answers together. Keys: cold, sick/ ill, must be delicious, be interesting/ attractive. Group Work Look at this picture of a ro
15、om. How much can you tell about the person who lives here? Is it a boy or a girl? What are his/ her hobbies? Discuss your ideas with a partner.A：It could be a girls room because its very tidy.B：I guess so. But it might be a boys room because the clothes look like boys clothes.A：It could/ might/ cant be. because.B：I guess so/ I dont think so. But it might/ could/ must be . because . Homework Remember the Grammar.Finish the exercise in 4c.
