Unit 2 Section A（3a-3d） 课件2024-2025学年人教版（2024）英语七年级下册

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. Don’t run in the hallways Arrive on time Be quiet in the library. No fighting! Wear the school uniform. … Brainstorm School rules Grammar Focus 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 dinning hall. Imperatives and Modal verbs(can, have to, must). 肯定祈使句 否定祈使句 情态动词 3a 1.祈使句 祈使句一般用来表示请求、______、劝说、号召、_____等。在祈使句中，通常省略_____________。肯定式以___________开头，否定式在动词原形前加______。 命令 警告 主语you 动词原形 don’t Observe and find 2.祈使句的类型 （1）Do型祈使句 例句：Walk in the hallway. Don’t run! （2）Be型祈使句 例句：Be polite and treat one another with respect. （3）Let 型祈使句 （4）其他类型的否定祈使句 No + v.-ing ! / No + n. 表示禁止 No parking here! No photos! never代替don’t， 加强语气。 Never give up! Let’s see the lions. Let him come in. 3. 情态动词can, have to, must can have to must 含义 表能力，意为 “能；会” 表请求、许可，意为“可以” 不得不；必须 必须 例句 I can play badminton, but I can’t play the piano. We have to be quiet in the library. Don’t arrive late for class. We must be on time. 共同点 后跟动词原形 后跟动词原形 后跟动词原形 （2）have to与must的不同之处 I must go now. 我现在必须走了。 must表示说话人的主观看法，语气较强烈 It’s too late and I have to go. 天太晚了，我不得不走了。 have to 往往强调客观需要 You mustn’t talk to your mother like that. 你不准和你妈妈那样说话。 mustn’t 表示“不准；禁止” You don’t have to come if you don’t want to. 如果你不想来就不必来。 don’t want to 表示 “不必” （2）have to与must的不同之处 I / We / You / He / She / It /They must arrive there today. 我/我们/你/你们/他/她/它/他们今天必须到那儿。 must无人称和数的变化 I have to clean my room today. 今天我不得不打扫我的房间。 She has to clean her room too. 她也不得不打扫她的房间。 have to 有人称和数的变化 Don’t jump the queue. You _______ wait for your turn. 2. You________ just ask your teacher a question in class. You _____raise your hand first. 3. A: Can I leave the class 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 / mustn’t. 插队 等待 缺席；不在 3b must can must must have to 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! 安全带 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. Group work Brainstorm three rules for one of the places below. library We must keep quiet. We mustn’t make noise. Don’t eat or drink in the library. Return books in time. … 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 here. We can’t take books out of the library without permission. Dining Hall Rules Don’t jump the queue. Don’t waste food. Clear dishes from the table before you leave. In the school dinning hall We can’t jump the queue. We can’t waste food. We have to clean the table before we leave. Park Rules Don’t litter. Don’t step on grass. Don’t pick flowers. In the park We can’t throw rubbish here and there. We can’t walk on the grass and pick flowers. We can’t play with fire. Cinema Rules Keep quiet. No filming or recording. Keep your phone silent. In the cinema We must sit on the assigned seat shown on the ticket. We mustn’t smoke here. We must keep quiet while watching. Hospital Rules No smoking. Keep quiet. Don’t run in the hallway. In the hospital We mustn’t smoke. We have to be quiet. Don’t run in the hallways. Rules are everywhere in our daily life. We should follow the rules and make a quiet and comfortable place for everyone. 基础作业 1. Remember the sentences in Grammar Focus. 2. 掌握祈使句, 情态动词can、must、have to 的用法。 提升作业 Write your home rules. 拓展作业 查找了解国外学校的校规。 Homework $$