英语人教版九年级全册Unit8 Grammar.doc

Period 3 Section A 3 (Grammar Focus-4c)教学设计一、教学目标： 1. 语言知识目标：1) 学习掌握下列词汇：laboratory, coat, sleepy, pocket 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。三、教学过程Step 1. Revision Review some main phrases and sentences we learned in the last class.Step 2. Grammar Focus情态动词表推测，可能性：must can/could may/might一. can和could的区别和用法1. can表示体力和脑力方面的能力, 或根据客观条件能做某种动作的“能力”。 例如：Can you speak English？ Can you make a cake？ can用在否定句和疑问句中时有时表示说话人的 “猜测”或 “不肯定”。 Can the news be true？(在日常会话中, can可代替may表示“允许”, may比较正式)2. could 是 can的过去式, 表示过去有过的能力和可能性, 还有怀疑和不肯定的意思(在否定和疑问句中)。 She couldnt skate when she was five years old.（能力） At that time we thought the story could be true.（可能性） could用来提问, 是有礼貌的请求 Could. Please? 语气较为婉转。 Could I speak to Mr. Smith, please?二. Might和may的区别和用法: 1. may的用法: a. 表示”允许”或”请求”。 May I come in？ 在使用这一用法时需注意: may表示“允许”的否定形式是must not, 意思是“不应该” “不许可”。e. g.May I take this book out of the reading-room？No, you mustnt b. 表示说话人的猜测，认为某一事情“或许”或“可能”发生。He may know the answer c. may用在感叹句中可表示祝愿、愿望。 May you succeed(祝你成功。)May you have a pleasant journey(一路平安。) 2. might的用法: a. might可以代替may, 表示现在时间的动作，但语气较为婉转客气或更加不肯定。 Might I take a suggestion？ b. might用来表示现在时间时, 还可表示”规劝”。You might pay more attention to spoken English 三. must与have to的区别have to比较强调客观需要, must着重说明主观看法。另外have to能用于更多时态, 比较下面的句子：We had to be there at 10:00. 有时两者都可以用, 意思差别不大。We must have to leave now. must在表示说话人对事物的推测时候要注意它比may肯定得多, 相当于汉语的“一定”或“是”。(只有在肯定句中能这样用。) This must be your room 在回答由must引起的问题时, 如果是否定的答复，不能用mustnt, 而需要用neednt或dont have to, 因为mustnt是“一定不要”的意思。Step 3. 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) 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 there are Jims glasses. B: They _ (cant be / might be / could be) his. 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 Ss. Keys: might be, must be, could be, cant be, must be5. Explanation. (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 basketball. 我想打篮球。Work on 4b. Complete these responses.1. Tell Ss 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 this book, I feel sleepy. B: It cant _.2. Let Ss write down possible answers as much as possible.3. Let Ss check their answers with their partners.4. Check the answers together. Keys: cold, sick/ ill, must