Unit 8 Section A 语法精讲精练）（同步课件）-【精品课】2025-2026学年九年级英语全一册同步精品课件（人教版）

该初中英语课件聚焦情态动词表推测核心知识点，涵盖must、can、could等词的肯定、否定及疑问用法。通过Revision环节“Is this schoolbag really Linda’s?”的情境问题，结合发带、网球等物品推测旧知，搭建“物品关联—语法规则—语境运用”的学习支架，衔接前后知识脉络。 其亮点在于以语境化例句（如“Whose volleyball is this?”对话）强化语言能力，用对比表格梳理句式与情态动词用法培养思维品质，“must不否问”等口诀助力高效记忆。中考链接与分层练习提升学习能力，学生能在情境中掌握推测用法，教师可借助系统内容设计提升教学效率。

Unit 8 It must belong to Carla. Section A Grammar Focus school T-shirts hair band ______go to their school must ____ be a boy could___ Mei's might ________ Linda can't be belong to tennis balls on the tennis team _____ be Linda’s must Revision Is this schoolbag really Linda's? 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。他们两人都是长发。 It be Mei's hair band . Or it belong to Linda. They have long hair . 3.那晚你看到了什么？ 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。 I'm , but it a dog . It was bigger, I think it a bear or a wolf . Whose volleyball must Carla’s Whose hair band could might both What not sure can’t be might be Grammar Whose volleyball is this? It must be Carla’s. She loves volleyball. Whose hair band is this? It could be Mei’s hair band. Or it might belong to Linda. They both have long hair. What did you see that night? I’m not sure, but it can’t be a dog. It was bigger. I think it might be a bear or a wolf. Read Grammar Focus and underline the modal verbs. 语法重点: 情态动词表推测 表示可能、怀疑、允诺、愿望、义务、必要、猜测等的动词就是情态动词。情态动词可以表示说话人的语气或某种情态，也可以表示推测。 英语中表示推测的情态动词主要有 must, can, could, may, might, can’t等。 must ＞ can ＞ could ＞ may ＞ might ＞can’t Grammar must 他肯定知道答案。e.g. He ______ ______ the answers. must表示有把握的______推测，意思是______。只能用于肯定句。 肯定 一定 Tips ：mustn’t do “禁止做某事” (在英语中不能用于表示推测) 你绝不能迟到。e.g. You ______ ____ late. Tips:如果要表示“一定不”，应该用can’t。 must know mustn’t be 他肯定不知道答案。e.g. He ______ ______ the answers. can’t know 6 Grammar 他肯定不知道答案。e.g. He ______ ______ the answers. can表示推测时，意思是______。一般用于否定句或疑问句。 可能 否定句 can’t know 过了这么多年，他有可能还活着吗? e.g. Can he still be alive after so many years? can can’t表示 否定推测，意思是 。 疑问句 不可能 7 Grammar 今天下午可能会下雨。e.g. it rain this afternoon. could/may/might表示把握性不大的推测时，意思是______。 可能 could/may/might 那个消息可能不是真的。e.g. The news might not/may not be true. could/may/might Tips: may not/might not意思是 。 否定句 Tips: could not意思是 。 那个消息可能不是真的。e.g. The news could not be true. 可能不 不可能 8 情态动词表推测 含义 可能 may ; could ; might 不可能 can’t/couldn’t 可能不 may not/might not 一定 must Grammar 情态动词表推测 Which sentence is wrong? Grammar He must be reading in the library. Must he be at home? He mustn’t be doing his homework. 注意： must 表示推测只用于肯定句 口诀： must 不否问 He must be in his office. He could have known the truth. She can be doing her homework. Which sentence is wrong? 注意： can 表示推测通常不用于肯定句 口诀： can 不肯 Grammar Which sentence is wrong? Grammar Can he be in his office? May he have known the truth? Could he be doing his homework? 注意： may 表示推测通常不用于疑问句 口诀： may 不问 句式 情态动词 含义 用法 肯定句 must 一定 表示有把握的肯定推测。 may/might/ could 也许；可能 表示没有把握的推测。 否定句 can’t/ couldn’t 不可能 表示有把握的否定推测。 may not/ might not 可能不 表示不太有把握的肯定推测。 疑问句 can/ could 可能 表示推测。 Grammar 情态动词表示推测可以分为以下几种情况: (1)情态动词+ do  此结构表示对现在或将来情况的推测和判断。 eg： —Do you know where she is now? —I think she might travel in Beijing.      (2)情态动词+ be doing  此结构表示对现在或将来正在进行的情况的推测和判断。 eg：At this moment, my father can’t be working in the office. (3)情态动词+ have done     此结构表示对过去情况的推测和判断。 eg：The road is wet. It must have rained last night.  (4)情态动词+ have been doing     此结构表示对过去正在进行的情况的推测和判断。 eg：Your mother must have been looking for you at that moment. 情态动词 1. She cans play the piano. 2. Tom could is at home. 3. They don’t can speak Japanese. 4. Do we can play basketball after school ? Can you find the mistakes in the sentences? Can we can play basketball after school ? She can play the piano. Tom could be at home. They can’t speak Japanese. 情态动词没有人称、数的变化，即情态动词第三人称单数不加s。 情态动词后面＋动词原形。 情态动词和助动词不能一起用。 1. 情态动词不能表示正在发生或已经发生的事情， 只表示期待或估计某事的发生。 2. 情态动词ought和have,后面只能接带to的不定式。 3.情态动词没有人称、数的变化，即情态动词第三人称单数 不加s。 4.情态动词没有非谓语形式，即没有不定式、分词等形式。 语法特征 —Finally, they came back. —They ______ be hungry after such a long walk. A．can’t B．must C．needn’t D．need B 典例 点拨 可用语境分析法和语法判断法解答本题。can’t 表示否定的推测“不可能”；must 表示肯定的推测“一定”；need 用作情态动词时常用于否定句，needn’t“没必要” 。根据语境可知选B项。 情态动词表示推测的用法 18 When you are travelling, bring a map because it ______ help you. A．can’t B．mustn’t C．used to D. may D 典例 点拨 可用语境分析法解答本题。句意：当你旅行的时候，带一幅地图，因为它可能会帮助你。can’t “不可能”；mustn’t “不准，不许”； used to “过去常常”；may “可能”，表示推测。由语境可知选D项。 情态动词表示推测的用法 19 He ______ in the library now. I met him in the classroom just now. A．can’t read B．can’t be reading C．might be reading D．might read B 典例 点拨 可用语境分析法和语法判断法解答本题。由空格所在句子的时间状语 now 可知， 用“情态动词+be+动词 -ing 形式”表示对正在发生的事情进行推测。由下一句可知表示否定推测，故选B。 情态动词表示推测的用法 1. —Whose physics book is this? —It ______ be Helen's because her name is on it. A. mustn't B. must C. might D. can't (2022 四川遂宁) 2. —David, do you know Su Yiming, a snowboarder from China? —Sure. He won the first place in the men’s Big Air Event. He _______ be hard-working. A. needn’t B. can’t C. should D. must (2022 四川泸州) B D 3. —Who is playing the piano in the music room? Is it Mary? —No, it ______ be her. She has ______ to Beijing on business. A. couldn’t; been B. can’t; gone C. can’t; been D. mustn’t; gone (2022 四川达州) 4. —Whose English book is this? —It ______ be Lily’s, but I’m not sure. A. might B. can’t C. must (2022 湖南怀化) B A 5. The book ______ be Mary’s. We can see her name on it. A. need B. must C. can’t D. needn’t (2022 天津) 6. —The paper cutting is pretty lively; who made it? —It ______ be Amy. None of us except her is able to do it. A. would B. need C. must D. can (2022 辽宁本溪、辽阳、葫芦岛) B C 7. —What will the weather be like tomorrow? —It ______ be rainy, cloudy or sunny. I am not sure. A. must B. may C. can’t D. should (2021 辽宁朝阳) B 8. Life _______ be easy or difficult, sometimes it depends on how you look at it. A. can't B. must C. can (2021 四川成都) C 9. —I saw Mr. Li in his office just now. —No，it _______be him. He has _______ Guangzhou and will be back in two days. A. mustn’t; gone to B. mustn’t; been to C. can’t; been to D. can’t; gone to (2021 新疆) 10. —Sandy, is Mr. Li in the teachers’ office now? —I am not sure. He ______ be there. A. must B. can’t C. mustn’t D. may (2021 江苏宿迁) D D Choose the best way to complete each sentence using the words in brackets. 1. A: Where’s Jean? B: I’m 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 / can’t be /could be) hot outdoors. might be must be n. 实验室 4a 3. A: That’s the phone. B: Hmm. I wonder who it ________ (must be / could be / should be). 4. A: I wonder if these are Jim’s glasses. B: They ________ (can’t be / might be / could be) his. He doesn’t wear glasses. 5. A: I hear water running in the bathroom. B: It __________ (could be / must be / can’t be) Carla. She was thinking of taking a shower. could be can’t be could be adv. 在户外；在野外 4b Complete these responses. 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 can’t ____________________. getting colder/ cold outside having a sore throat/ ill must be delicious be interesting/ exciting n. 外套 adj. 困倦的；瞌睡的 【妙辨异同】 sleepy asleep 形容词，意为“困倦的；瞌睡的”。既可作定语，也可作表语。 形容词，意为“睡着的”，只能作表语，不能作定语。fall asleep 意为“入睡”。 What can you see in the picture? What are his/ her hobbies? Why do you think so? Who do you think lives in the room, a boy or a girl? Look at the picture and answer the following questions. A: It could be a girl’s room because it’s very tidy. B: I guess so. But it might be a boy’s room because the clothes look like boys’ clothes. 2. —Whose T - shirt is this? —It ______ be John' s. It’s ______ small for him. A. can't; much too B. can't; too much C. mustn't; much too D. mustn't; too much Practice 1.— Who’s singing in the next room? — It ____ be her. She has gone to New York. A. can’t B. must C. shouldn’t D. can 单项选择 30 Practice 单项选择 3. — Where are you going this month? — We______ go to Xiamen, but we're not sure. A. needn’t B. must C. might D. mustn't 4. --- Have you decided where to go for your summer vacation? --- Not yet. We _______ go to Qingdao. It's a good place for vacation. A. may B. need C. must D. mustn't 31 Practice 5.The dictionary ________ belong to Sam. You can see his name on it. A. need B. can C. must D. would 6.You haven't eaten all day. You be very hungry. A. couldn't B. can’t C. might D. must 单项选择 32 Practice 7.— ______ I know by what time you want the project to be done? — By the day after tomorrow. ______ you finish it on time? A. May; Can B. Must; Need C. Could; Must D. Need; Would 8.— Must I water the flowers now, mum? —No, you ______. You _____ do it later. A. mustn’t; must B. mustn’t; may C. needn’t; may D. needn’t; must 单项选择 33 用适当的情态动词填空。 1. — Susan has bought a large house with a swimming pool. — It ______ be very expensive. I never even dream about it. 2. — Listen! Is Mr. Green giving a report in the hall? — No, it ______ be him. He has gone to Japan. 3. Ann hasn’t come to school today. I think she_______________ be ill. 4. The guitar _______________ belong to Alice. She likes playing the guitar. 5. — I wonder if this is Jack’s book. — It ______ be his. It has Linda’s name on it. must can’t may/might/could may/might/could can’t $