Unit 2 Lesson 3 Grammar Focus (3a-3d)（讲解课件）-【优翼·学练优】2025-2026学年七年级英语下册同步备课（人教版）

该初中英语课件围绕祈使句及情态动词can, must, have to展开，通过“Watch and Say”视频观察台词共同点导入，衔接七上can的能力用法，聚焦本单元can的许可用法，搭建从观察到归纳再到应用的学习支架。 其亮点在于融合语言能力与思维品质培养，通过标志解读、小组设计图书馆等场所规则（如“Keep quiet”）等活动，让学生在真实情境中运用语法，对比must与have to的主客观区别提升分析能力，反思表助力学习能力发展。学生能提升规则表达与应用能力，教师可借助结构化资料高效教学。

Grammar Focus (3a-3d) Unit 2 No Rules,No Order Section A What rules do we follow? Learning Objectives In this lesson you will: 1. grasp the structures and the usage of imperative sentences; 2. be able to use modal verbs can, must, have to to talk about rules; 3. understand the signs of rules and explain what they mean. Watch and Say Watch the video and pay attention to the lines the characters say. What do they have in common? Sit! Be careful! Donald, say something! Take a deep breath. Don’t ask me to change. Never send a sheep to kill a wolf. Let’s get out of here. Don’t be scared. ... begin with a verb short no subjects These sentences are called imperative sentences(祈使句)! Grammar Focus 祈使句（Imperative Sentences） 祈使句一般用来表示请求、命令、劝说、号召、警告等。祈使句的主语一般是第二人称you，但往往省略。祈使句的肯定式以动词原形开头，否定式在动词原形前加don't。 e.g. Just go along this street and turn left. Be careful when you cross the street. Practise the guitar every day. Don't be late for class. Don't fight. 祈使句的种类及构成 肯定的祈使句：动词原形+其他. e.g. Walk in the hallway. Stand up! Be polite. Keep quiet. Be a good boy. 否定的祈使句：Don’t+动词原形+其他. e.g. Don’t run in the hallways. Don’t litter! Don’t be late. let型祈使句：Let+第一/三人称+动词原型+其他. e.g. Let me tell you the way to my house. Let’s see the lions. Let him go. No型祈使句：No+名词/动名词. e.g. No parking. 禁止停车。 No photos. 禁止拍照。 No entry. 禁止进入。 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. 祈使句中的动词原型，不需要变换形式。 情态动词后用动词原型。 3a 情态动词（Modal Verbs） 情态动词表示说话人的语气和情态，如请求、许可、意愿、可能等。一般没有人称和数的变化。 情态动词本身不能单独作谓语，必须和动词原形连用。 情态动词的否定式一般是在其后加not构成，一般疑问句通常将它提到句首。 情态动词的肯定式一般不重读。 情态动词can 1. 表示能力（七上Unit 5已经学习） e.g. I can run fast, but I can’t swim. 2. 表示许可（本单元重点） e.g. We can play basketball at the weekend. Students can’t run in the hallways. Can we bring our phones to class? 情态动词must 1. 表示“必须”，否定形式mustn’t 表示“禁止” e.g. Don’t arrive late for class. We must be on time. Students mustn’t use their phones at school. 2. 以must开头的一般疑问句，肯定回答用must，否定回答 用needn’t 或者don’t have to， 表示“不必要” e.g. —Must I clean the classroom now? —Yes, you must./No, you needn’t/don’t have to. 情态动词 have to 表示“不得不；必须”, 在表示“必须”时，与must意义接近， 有时可互换。 e.g. We have to be quiet in the library. She has to do her homework first when she gets home. We have to/must follow the rules. 1. must表示说话人的主观看法，语气较为强烈，have to则 强调客观需要。 must与have to区别 e.g. We must hurry. I don’t want to miss the begining of the show. We have to hurry. The train is leaving in 5 minutes. 2. 它们的否定式含义大不相同。mustn’t表示 “不准；禁止”， don’t have to表示“不必”。 e.g. You mustn't talk to your mother like that. You don't have to come if you don't want to. 3. must没有人称和数的变化，而have to有人称和数的变化。 e.g. I / We / You / They must do something about it. I have to finish my work today. She has to work late today. They have to get to the station before five o'clock. 1. Don't jump the queue. You____________wait for your turn. 2. I __________ feed my dog many kinds of food, but I _____________ give him chocolate. It’s 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. Complete the sentences using can, have to / must, or can’t / mustn't. have to/must can can’t/mustn’t must have to 3b 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! must/have to must/have to 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 / mustn't eat or drink. 3c Do not park here. No parking. You can't / mustn't park here. Do not take photos here. No photos. You can't / mustn't take photos here. Do not swim here. No swimming. You can't / mustn't swim here. Do not feed. No feeding. You can't / mustn't feed. In groups, brainstorm three rules for one of the places below. Then draw signs to show the rules. Share your signs in class and explain what they mean. Group Work library school dining hall park cinema hospital In the library, we must keep quiet. we mustn’t make noise. We can’t ... 3d Library Rules Keep quiet. No eating or drinking. Return books on time. Silence your mobile phone. In the library, we must keep quiet. We mustn’t make noise. We can’t eat or drink in the library. Because it may make the library untidy. We must return books on time. Last but not the least, we have to make our mobile phones silent. Library Rules Dining Hall Rules Don’t jump the queue. Don’t waste food. Clear dishes from the table before you leave. Park Rules Don’t litter. Don’t step on grass. Don’t pick flowers. Cinema Rules Keep quiet. No filming or recording. Keep your phone silent. Hospital Rules No smoking. Keep quiet. Don’t run in the hallway. Language Points n. （人、汽车等的）队，行列 常用短语：in a queue 排队 jump the queue 插队 e.g. There was a long queue outside the bank. e.g. How long were you in the queue? 你排队多长时间了？ It’s rude to jump the queue. 插队是很不礼貌的。 queue 1. Don't jump the queue. v. （人、车辆等）排队等候 queue 常用结构：queue for sth. 为……排队 queue to do sth. 排队做某事 不及物动词，常与up连用 e.g. We queued up for hours to get tickets. e.g. They queued for the latest phone. Shoppers queued to enter the supermarket during the sale. v. 离开 leave e.g. They leave the office at five o’clock. leave for 动身去（某地）；前往 e.g. We’re leaving for Paris tomorrow morning. 我们明天早上要动身去巴黎。 v. 留下；剩下 e.g. Leave your keys on the table. 把你的钥匙留在桌子上。 2. Can I leave the classroom if I don't feel well? adj. 缺席的；不在的 absent be absent from 缺席 e.g. The absent students have to make up the missed lessons. 缺席的学生必须补上落下的课程。 e.g. He is always absent from kinds of meetings. 他总是缺席各种会议。 adj. 茫然的；心不在焉的 e.g. The boy has an absent look on his face. 这个男孩一脸心不在焉。 3. You must tell your teacher about it when you have to be absent from class. v. 喂养；饲养 feed 通常直接接宾语，宾语多为动物或者小孩 e.g. She feeds her cat twice a day. 她一天喂猫两次。 feed sb./sth. on sth. 用……喂养…… e.g. Farmers feed pigs on corn. 农民用玉米喂猪。 4. I can feed my dog many kinds of food. Reflecting How well can you do these things? Very well OK Needs work 1. I can use imperatives to describe rules. 2. I can explain rules using can,must, have to. 3. 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