Unit 2 Section A Grammar Focus (3a～3d)课件2025-2026学年人教版英语七年级下册

Unit 2 No Rules, No Orders Section A Grmmar Focus (3a ~ 3d ) What rules do we follow ? Review What rules should Tom follow ? Tom _________ eat sweets in the classroom because they don’t ___________ in class. Tom _________ bring his mobile phone to class. He has to ________ his phone and keep it ___________. can’t eat snacks mustn’t turn off in his locker Review What rules should Marry follow ? Marry _________ run in the hallway. She should ________ in the hallway. can’t walk Review What rules should Marry follow ? Sally _________ wear her own jacket at school. She has to wear ____________. mustn’t the school uniform Review What rules should Tony follow ? Tony _______litter. He must keep the school ____________. can’t clean and tidy 3a Read the sentences . Do the verbs in bold need to change forms ? Why ? Walk in the hallway . Don't run ! Be polite and treat one another with respect . Don't litter ./ You mustn't litter ./ You can't litter . Can we bring our phones to class ? No , we can't . We must keep them in our lockers . Can we eat snacks in class ？ No , we can't eat in class . We have to eat in the dining hall . 3a Read the sentences . Do the verbs in bold need to change forms ? Why ? You mustn't litter . You can't litter . Can we bring our phones to class ? No , we can't . We must keep them in our lockers . Can we eat snacks in class ？ No , we can't eat in class . We have to eat in the dining hall . The highlighted words are all ____________________. They should go with _____________________________. modal verbs (情态动词) base forms of verbs (动词原形) Grmmar Focus Modal verbs (情态动词) 定 义 表示说话人的语气，情感和态度的词。 用 法 情态动词本身有________。 没有________ 和 ________的变化。 不能单独作________，需和__________一起构成谓语。 常见情态动词 can / can’t , must / mustn’t , could / couldn’t should / shouldn’t , may 词义 人称 数 谓语 动词原形 Grmmar Focus can / can’t的用法 用 法 表示许可，意为“可以，能” eg. We can eat in the dining hall . We can’t eat in the classroom. 表示能力，意为“会，能” eg. I can swim / speak English . I can’t swim / speak English . 表示请求，意为“可以，能” eg. Can you help me ? Can you give me some advice ? 表许可：意为经过他人的同意，允许做某事。 表请求：意为请求，要求他人做某事。 Grmmar Focus must / mustn’t的用法 用 法 强调说话人的主观意愿 eg. We must listen carefully in class . 常用于一般现在时，无人称和数的变化 eg. I must work hard . He / She must work hard . We / They must work hard . 否定形式为mustn’t，表示“不准，禁止” eg. We mustn’t litter. We mustn’t bring mobile phones to class. Grmmar Focus must / mustn’t的用法 Must引导的一般疑问句 Must we wear the school uniforms ? Yes, we must . 肯定回答：常用_______回答。 否定回答：常用_______或___________回答。 must needn’t don’t have to No, we needn’t . / No, we don’t have to. Grmmar Focus have to 的用法 用 法 强调客观的需求 eg. We have to keep our phones in the lockers . 有人称和数的变化 eg. I have to walk in the hallway. He / She has to walk in the hallway . We / They have to walk in the hallway. 否定形式为don’t / doesn’t have to，表示“不必” eg. We don’t have to wear the school uniforms. He / She doesn’t have to turn off his / her phone. Grmmar Focus 辨析 must & have to 用法 否定意义 时态 must have to 侧重于主观必要和个人意志 侧重于客观上的必要 mustn’t表示禁止 don’t have to 表示不必要 没有人称，数和时态的变化 有人称，数和时态的变化 3b Complete the sentences using can , have to / must , or can’t / mustn’t 1. Don't jump the queue . You ______________wait your turn . 2. I _____feed my dog many kinds of food , but I ______give him chocolate . It is bad for him ! 3. A : Can I leave the classroom if I don't feel well ? B : Yes , but you ______tell your teacher about it when you _______ be absent from class . 4. A : Hey ! Can I look at your book ? B : Shh , we ____________ talk quietly in the library . 5.A: Can you put on your seat belt ? We ______wear one when we're in a car . B : Sure . Thanks ! have to / must can can’t must have to have to / must must many kinds of all kinds of a kind of. give sb. sth. give sth. to sb. be bad for be good for quietly = quiet + ly 3a Read the sentences . Do the verbs in bold need to change forms ? Why ? Walk in the hallway . Don't run ! Be polite and treat one another with respect . Don't litter . All these sentences are ____________________. imperatives (祈使句) They all start with __________________________. base forms of verbs (动词原形) Grmmar Focus 祈 使 句 含义 祈使句以__________开头，没有______和_____的变化。 用于表达____，______,_____,______和_____。 祈使句没有_______，实际上是省略了主语_____。 动词原形 人称 数 命令 请求 建议 劝告 禁止 主语 you Grmmar Focus Do型祈使句 构 成 肯定句 eg. Arrive on time . Keep our school clean and tidy. Raise your hand. 否定句 __________ 开头。 动词原形 在句首加______或______。 don’t never eg. Don’t talk in class . Don’t eat in the classroom. Never give up. Grmmar Focus Be型祈使句 构 成 肯定句 eg. Be careful. Be polite. Be a good student. 否定句 Be + ________或______。 形容词 名词 在句首加______或______。 don’t never eg. Don’t be late for school . Don’t be noisy. Grmmar Focus Let型祈使句 构 成 肯定句 eg. Let’s go . Let him keep quioet. Let them follow rules. 否定句 Let + _____ +_________。 宾语 动词原形 Let + 宾语 +_____ +动词原形。 not eg. Let him not make a noise. Let’s not talk in class. Let them not break rules. Grmmar Focus No型祈使句 否定句 No + ______或_______。(表禁止) Ving 名词 eg. No parking. No smoking. No photos. 3c Look at the first sign and read the rules. Then write the rules for the other signs. . Do not eat or drink. No eating or drinking. You can’t or mustn’t eat or drink. 3c Look at the first sign and read the rules. Then write the rules for the other signs. . Do not park. No parking. You can’t or mustn’t park your car. park: v. 停车 n 公园 3c Look at the first sign and read the rules. Then write the rules for the other signs. . Do not take photos. No photos. You can’t or mustn’t take photos. 3c Look at the first sign and read the rules. Then write the rules for the other signs. . Do not swim. No swimming. You can’t or mustn’t swim here. 3c Look at the first sign and read the rules. Then write the rules for the other signs. . Do not feed birds. No feeding. You can’t or mustn’t feed birds. 3c In groups, brainstorm three rules for one of the places below. . Share your signs in class and explain what they mean. library school dining hall park cinema hospital In the library, we must keep quiet. We mustn’t make noise. We can’t .... 3c In groups, brainstorm three rules for one of the places below. . Share your signs in class and explain what they mean. keep quiet No noise No eating In the library, we must keep quiet. We mustn’t make noise. We can’t eat any snacks, but we can drink water. library 3c In groups, brainstorm three rules for one of the places below. . Share your signs in class and explain what they mean. Don’t litter No noise No swimming In the park, we can’t litter. We should keep the park clean and tidy. We must be polite, so we mustn’t make noise in public. We mustn’t swim in the river, because we should keep safe. park Exercises 根据括号内所给单词的适当形式填空。 1. __________(open) the door, Sara. 2. No __________(talk) in the library. 3. ___________(not spend) too much time on your phone before going to bed. 4. Be _________(care) when you cross the road. 5. Please_________(not play) computer games so much, Jim. Open talking Don’t spend careful don’t play Exercises 根据括号内所给单词的适当形式填空。 1. I _______(can) play basketball with you. I have too much homework to do. 2. -- Can your parents __________(speak) English ? -- Yes, they can. 3. You can ______(swim) in the swimming pool with your friends at the weekend. 4. Slow down, Please. You _________(must) run in the hallway. 5. We have to_________(put) on our seat belts when we’re in a car . can’t speak swim mustn’t put Unit 2 Thank You ! $