Unit 2 No Rules,No Order Section A Grammar Focus 课件 2025-2026学年人教版七年级英语下册

Unit 2 No rules, no order Section A Grammar Focus Learning objectives 发现并总结祈使句和含有情态动词的句子中的动词的形态变化特点; 归纳和掌握祈使句的句式结构、意义和用法; 根据语境，正确运用情态动词 can、must、have to; 使用祈使句和情态动词谈论学习和生活中的规则。 在本节课结束后，我将能够： 肯定式 Turn back! Go to bed now! Do型：动词原形+其他 Be quiet, please! Be careful! Be型：Be+其他 Let’s go! Let’s have a rest! Let型：Let sb do+其他 3. 祈使句的类型？ What kind of rules can you see? 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. 1.通常省略主语you。 2.其肯定形式常以动词原形开头，否定形式是在动词原形前加don’t。 3.祈使句句尾用句号或感叹号。 2. 祈使句的特点？ Stand up. Sit down. Take a seat. Open your book. Raise your hands. Clap your hands. Use your pen. I say, you do. Game Time Look at the blackboard 否定式 Don’t be late! Don’t smoke here! Don’t let him leave! Don’t型 Don’t be+其他 Don’t do+其他 Don’t let+其他 No photos! No smoking! No型 No+n. No+v.ing 祈使句 (Imperative sentences) /ɪmˈperətɪv/ 祈使句Imperative sentences 命令 建议 祝愿 请求 警告 劝说 ... Help me, please. Have fun. Stand up. No photos. Let's start the party. Don’t be sad. 祈使句一般用来表示请求、命令、劝说、号召、警告等。在祈使句中，通常省略主语you，其肯定形式常以动词原形开头，否定形式是在动词原形前加don’t。祈使句句尾用句号或感叹号，读时用降调。为表示礼貌，可以在句首或句末加上please。句末用please时，前面通常加逗号。 Language points 1.祈使句（Imperative Sentences）： 用于表达命令、请求或建议。 通常以动词原形开头，不需要改变动词的形式。 例如："Walk in the hallway."（在走廊里走。） "Be polite and treat one another with respect." （要有礼貌，互相尊重。） 在英语中，祈使句用于表达命令、请求或建议，通常不需要改变动词的形式。 2.禁止（Prohibition）： 用于表达不允许做某事。 通常使用"mustn't"或"can't"来表达禁止。 例如："You mustn't litter."（你不能乱扔垃圾。） "You can't litter."（你不能乱扔垃圾。） 否定式 Don’t be late! Don’t smoke here! Don’t let him leave! Don’t型 Don’t be+其他 Don’t do+其他 Don’t let+其他 No photos! No smoking! No型 No+n. No+v.ing Modal Verbs (情态动词) 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. 1. 出现了哪些情态动词？ can, must, have to 小结 祈使句一般用来表示请求、命令、劝说、号召、警告等。在祈使句中，通常省略主语you，其肯定形式以动词原形开头，否定形式是在动词原形前加don’t。祈使句句尾用句号或感叹号，读时用降调。为表示礼貌，可以在句首或句尾加上please。句末用please时，前面通常加逗号。 P13 We mustn’t make noise. noise /nɔɪz/ n. 噪音，干扰 make noise/make a noise 吵闹；制造噪音 noise通常指噪音，指人们听到的不悦耳、不和谐的嘈杂声或任何令人讨厌的声音。 sound指听到的声音或响声，用作可数名词，泛指自然界的各种声音或响声，包括人声、鸟声、流水声等。 voice指人口中发出的声音，如说话声、歌唱声。 虽然sound可以泛指一切声音，但在具体运用时，如果能确定声音属于voice或noise，则一般不使用sound。 义务（Obligation）： 用于表达必须做某事。 通常使用"must"或"have to"来表达义务。 例如："We must keep them in our lockers." （我们必须把它们放在我们的储物柜里。） "We have to eat in the dining hall." （我们必须在餐厅吃饭。） 练 (一)完成句子练习： 1.Please ______ (关上) the door when you leave the room. 2.___________ (不要跑) in the hallways. 3.___________ (保持安静) during the test. 4.___________ (等待) your turn before you speak. close Do not run Keep quiet Wait Learn to use modal verbs (情态动词) 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. 1.出现了哪些情态动词？ can, must, have to 根据语境，从方框中选择恰当的情态动词填空。 can, can’t, must, have to, don’t have to 1. Jim, you ___________ clean your room now. It’s so dirty. 2. You ___________ eat too much ice-cream. It’s not healthy. 3. Cindy lives with her grandparents and she __________ see her parents only on weekends. 4. My bike doesn’t work so I ______________ walk to school. 5. You ____________ do your homework right now. You __________ do it after dinner. can’t must can must/have to  don’t have to can 根据括号内的要求完成下列各题，每空一词(含缩略形式)。 1. You can’t draw on the desk. (改为祈使句) _______ _______ on the desk. 2. —Can you talk in the library? (补全否定答语) —No, _______ _______. 3. Steve has to go home before seven. (改为否定句) Steve _______ _______ _______ go home before seven. 4. Jane has to exercise every day. (改为一般疑问句并作肯定回答) — _______ Jane _______ _______ exercise every day? —_______, _______ _______. I / we can’t Don’t draw doesn’t have to Does have to Yes she does Homework SECTION A (二)改写句子练习： "Be quiet!" can be written as "________________ (请安静)." "Don't eat in class." can be written as "_______________(不要在课堂上吃东西)." (三)填空练习： If you want someone to pass you the salt, you might say, "____________________ (请把盐递给我)." To tell someone to stop talking, you could say, "______________ (停止说话)!" Please be quiet Do not eat in class Please pass me the salt Stop talking 情态动词的作用? 情态动词用于表达说话人的态度、意愿、推测、建议、能力、义务等。 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. 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. 情态动词的特点? 没有人称和数的变化； 后面必须跟动词原形来构成完整的谓语。 Homework Review the keywords and sentence structures in today’s lesson. 2. Preview Section B part (1a-2c) on pages 14-16. SEE YOU NEXT CLASS! $