Unit 6 Electricity everywhere Section 2 课件2025-2026学年沪教版英语七年级下册

该初中英语课件聚焦情态动词can、may、must的用法，通过Benny与Daisy关于“电”的生活化对话导入，从情境例句到分模块讲解含义、句式变化，再到多样化练习，构建从感知到应用的学习支架。 其亮点在于以真实语境培养语言能力，如驾驶测试情境题和对话填空练习，结合可能性图表区分推测用法，提升思维品质。采用情境教学法和表格总结结构，学生能在实践中掌握情态动词，教师可借助系统支架提高教学效率。

Unit 6 Electricity everywhere Learning objectives 学习目标 At the end of the class, I’ll be able to: 1. Master the rules of using modal verbs: can and cannot, may and may not, must and must not; 2. Use modal verbs to express rules; 3. Put modal verbs into daily life. Modal Verbs 情态动词 1. Lead in Daisy is telling her brother Benny about her science lesson. Read the dialogue and pay attention to the words in bold. 黛西，你的学校生活怎么样？ 非常棒。我们在科学课上学习了电。 你能告诉我你对电的了解吗？ 我们看不到它为日常生活提供动力，但当有雷暴时我们就能看到它。 对。妈妈告诉我在暴雨天我们一定不要出门，很危险。 是的，没错。然而，你可以用尺子摩擦你的毛衣来安全地生产电。看我！ 当然。都是你必须把它欢给我，因为这是我最喜欢的尺子。 哇，这太有趣了！我可以试试吗？ 2. Presentation: Modal Verbs You can produce electricity safely by rubbing a ruler against your sweater. You must give it back to me because it’s my favourite ruler! You may turn on the TV. What if I remove the can, must, and may? The speaker’s mood and attitude changed! 你可以用尺子摩擦你的毛衣来安全得产生电。 你必须把它还给我，因为那是我最喜欢的尺子。 你可以打开电视。 情态动词表示说话人对动作的情感态度 情态动词不单独出现，需与________连用 情态动词一般______人称和数的变化 What is the modal verbs? She buys electricity in packets. She must buy electricity in packets. She can buy electricity in packets. She may buy electricity in packets. 动词原形 没有 2. Presentation: Must Find out the usages: Must You must have a look at your room. You mustn’t mess up the room again. Must I take out all the trash? No, you needn’t. 观察must此时表示什么？ 必须 We use must and must not (mustn’t) to tell people what to do or what not to do. 句式变化 肯定句 You must take out all the trash. 否定句 You must not/mustn’t do that. 一般疑问句 Must I take out all the trash? 回答 Yes, you must./ No, you needn’t. 主+must+动原+其他 主+must not/mustn’t+动原原+其 Must+主+动原(must提前) 肯定回答must, 否定要用needn’t must 表示“必须，应该”； mustn't 表示“禁止，不许”； 否定回答常用 needn't 看一看 弄乱 垃圾 Practices 看图片，用must造句，并进行句型转换。 肯定句: when we come back from the outside. 否定句： when we come back from the outside. 一般疑问句： when we come back from the putside? 回答： We must wash our hands We must not/mustn't wash our hands Must we wash our hands Yes,we must./No,we needn't. DRIVING TEST must, needn’t or mustn’t ? You ___________ turn right must mustn’t You ___________ turn left must mustn’t You ___________ stop here needn’t mustn’t You ___________ turn left needn’t mustn’t You ___________ turn right must mustn’t You __________ go to the gas station needn’t mustn’t 2. Presentation: Can Find out the usages: Can We can take good care of ourselves! I cannot cook for you. Can you help me with the lunch? Yes, I can. 观察can此时表示什么？ 能力/请求许可 We use can and cannot To express abilities (能力) To make a request (请求) and give permission (许可). 句式变化 肯定句 I can cook for you. 否定句 I cannot/can’t cook for you. 一般疑问句 Can you cook for me? 回答 Yes, I can./ No, I cannot/ can’t. 主+can+动原+其他 主+cannot/can’t+动原+其他 Can+主+动原(can提前) 肯定回答can, 否定要用can’t can 表示能力，意为”能，会“ can 表示请求或许可，意为”可以“ can 的否定式为cannot,缩写为can't. 2. Practice: Can 肯定句: on the satge. 否定句： on the satge. 一般疑问句： on the satge? 回答： She can dance. She can't dance. Can she dance Yes,she can. 舞台 2. Practice: Can Practice Fill in the dialogue with can or cannot. Lucas: Mr. Wang, ______ I use the classroom computer? Mr. Wang: Yes, but ______ you finish your math homework first? Lucas: Of course! I ______ solve these problems quickly. Mr. Wang: Great! Oh, ______ you help me turn off the lights later? Lucas: Sure! But I ______ reach the switch. It’s too high. Mr. Wang: No problem. I ______ do it for you. can can can can cannot can 2. Presentation: May Find out the usages: May May I watch the TV for a while? You may do that after washing the dishes! No, you may not. 观察may此时表示什么？ 请求许可 We use may and may not to ask for, give and refuse permission. 句式变化 肯定句 You may do that. 否定句 You may not do that. 一般疑问句 May I do that? 回答 Yes, you may/can. No, you may not/can’t. 主+may+动原+其他 主+may not+动原+其他 May+主+动原(may提前) 非正式语境中，may也可用can替代 may语气比can更正式礼貌 may 用于表示征求对方的请求或许可， 意为”可以“，比can 语气更委婉。 肯定回答用”Yes,you may." 否定回答常用 “No,you may not./No,you can't." 4. More to Learn Must, May Can表推测 You must be very tired. Let’s take a rest right now! must:一定 一般仅用于肯定句，不用于否定句和疑问句，有把握的推测 You may be very tired. How about taking a rest. may:可能 不用于疑问句中,没有把握的推测 You can’t be tired. You took a rest just now! can’t:不可能 一般用于否定句中,有把握的推测 possibilities can’t be 0% may be must be 100% 4. More to Learn Practice What can you learn from the picture? He can’t be an old man. He must be a policeman. He may catch a bad man today. can't may must Summary to must, can and may 肯定句： 否定句： 疑问句: 回答： Sentence structures Definition and common rules 表示说话人对动作的情感态度 不单独出现，需与动原连用 一般没有人称和数的变化 Usages must: 必须；一定 can：能力/请求许可；can’t不可能 may：请求许可；可能 Practice Fill the blanks with must, can or may. 1. I finish the work now ?No, you . 2.Don't worry. You return me this book tomorrow . 3.My grandma is ill. You talk so loudly here . 4.I can't play with you. I finish my homework first. 5.I get up early tomorrow. because I have a meeting. 6. you please open the window? 7. Lily be in the classroom. I saw her there just now! Must needn't may can't must must Can must Practice Makes Perfect! Lavf60.16.100 vid:v0369cg10004d83d5cqljht116t5gecg $