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

Unit 2 No Rules, No Order (Section A Grammar Focus 3a-3d) 第3课时 R·七年级下册 1. 掌握并正确运用词汇：jump the queue、feed、absent from、quiet 2. 学习祈使句的用法。 3. 掌握并正确运用情态动词(can, have to, must)。 Learning goals 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. Read and judge(读句子，并判断). （ ） （ ） （ ） （ ） Please give me some water. Go out! Make good use of your free time, please. Please don’t run in the hallways. 表请求 表命令 表劝告 表警告 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. 3a Imperatives(祈使句) The usage of modal verbs can/must/have to 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 【拓展】 （1）have to与must的相同点 二者均可表示“必须”，后接动词原形，有时可以互换。 We have to / must follow the rules. （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 3b 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 class if I don't feel well? B: Yes, but you ______ tell your teacher about it when you ______ be absent from a 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! Complete the sentences using can, have to / must, or can't / mustn't. have to/must can can’t/mustn’t must have to must/have to have to 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 / mustn't eat or drink. Textbook 3c Look at the first sign and read the rules. Then write the rules for the other signs. 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. Textbook 3c Look at the first sign and read the rules. Then write the rules for the other signs. Do not swim in the lake. No swimming. You can't/mustn't swim in the lake. Do not feed birds. You can't/mustn't feed birds. 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. Rules are everywhere in our daily life. We should follow the rules and make a quiet and comfortable place for everyone. Summary Grammar Imperatives Modal verbs: must/can/have to Show rules Do not… No… You can’t/mustn’t… Exercise 1. Students can talk loudly in the hallways. (改为一般疑问句） _______ students talk loudly in the hallways? 2. Maria has to practice the piano on Sundays.（改为一般疑问句） ________ Maria ________ _______ practice the piano on Sundays? 3. You can’t eat in the classroom.（改为否定祈使句） __________ __________ in the classroom. 4. They have to clean the classroom every day.（把they变为he） He ______ ______ clean the classroom every day. Can Does have to Don’t eat has to Review the usage of imperatives and modal verbs in the lesson. Read and show more rules in different places in your daily life. Homework $