Unit 2 Section A Grammar Focus (3a-3c) 课件 2025-2026学年人教版（2024）八年级英语上册

该初中英语课件聚焦情态动词can/could表礼貌请求与许可的用法，通过“Look and say”图片关键词回忆对话、“Watch and fill”视频填空导入，以基础句型（Can/Could you...?/I...?）为支架，结合分类标注、情景练习（如家庭 chores），帮助学生逐步构建知识脉络。 其亮点在于采用生活化情景（借笔记、请求搭车）和故事化案例（灰姑娘请求许可），提升语言运用能力；通过对比can（随意）与could（委婉）的语气差异，培养思维品质中的分析比较能力；强调礼貌表达益处（Show good manners）渗透文化意识。任务型活动（3a分类、3c编对话）与清晰小结助学生掌握，教师可利用丰富素材提升教学效率。

I'm sorry. so could you please put . them on right away quickly? Alright, okay, then could you please just give him a message for me. please? This is very important. Alright, what's. message. Could you please get the key off the back of the door for me? Presentation 单元主题范畴：人与社会 单元主题内容：和谐家庭 (2024新版)人教版 八年级(上册) Presentation 1.通过观看视频和图片，能够正确地回答问题，能够使用情态动词could练习表示有礼貌请求和请求许可的对话；能够根据情景和图片，说出有礼貌请求和请求许可的句子。（学习理解） 2. 通过正确完成3a练习，能够找出3a表格里哪些句子是有礼貌请求和请求许可的句子，能够说出两种句型的答语，能够说出 "Can/Could you...?" 提出请求和 "Can/Could I...?" 请求许可的句型结构，理解两者在语气和使用场景上的区别。(应用实践) 3.通过正确完成3b/3c练习，能够结合上下文语境，选择句子补全对话，能够根据所给情景，用情态动词could/can编写对话，通过练习，能够说出有礼貌交流的好处。（迁移创新） Learning Objectives Presentation What children want to do What parents want them to do hang out with friends after lunch keep some fish grow some flowers invite friends to our new house help me clean up the room help put the new clock on the wall move this chair to their room take care of them every day Do you still remember how they start the conversation? Ask for permission. （征求许可） Make polite requests.（礼貌地请求） Can / Could I do …? Can / Could you (please) do …? Presentation Let’s watch a video and fill in the blanks. 1.请大家马上戴上耳罩可以吗？ _________ please put earmuffs on right away? 2. 请你帮我传话给他们可以吗？ ________ please give them a message for me? 3. 请把门后的钥匙拿给我。 _________please get the key off the back of the door for me? 4.我要纸巾。 _______ have a napkin? Could you Could you Could you Could I polite requests polite requests for permission Presentation Complete the sentences according to the pictures and key words. If your mom want you to...... take the dog for a walk ____________ take the dog for a walk? Could you please OK, _____ I want to watch one show first. but If your mom want you to...... take out the rubbish ____________ take out the rubbish? Could you please Yes, sure/_________. No problem Presentation Complete the sentences according to the pictures and key words. Complete the sentences according to the pictures and key words. If you want to...... go out for dinner with your friends ______ go out for dinner with my friends? Could I ____, that should be OK. Sure If you want to...... get something to drink after the movie _______ get something to drink after the movie? Could we Sorry/No, you ____. You have a basketball game tomorrow. can’t Presentation Let's think and fill in the blanks. 1.When we need to ask others for help, we should say __________________, because it sounds more polite. 2.When we can help others, we should say__________________________. 3.When we can't help others, we should say ___________. Could you please ... Sure / Of course / All right Sorry, I can't 用could 提问，必须用____回答！ can Presentation Cinderella needs some help, or she couldn't go to the party on time. So she asks her friends for help! Let's think and fill in the blanks. _________________________? Yes, sure. / Of course. / All right. /OK. Sorry, I can't. I'm busy now. Could you please sweep the floor ____________________________? Could you please take out the rubbish _______________________? Could you please do the dishes ________________________? Could you please fold the clothes Presentation Let's think and fill in the blanks. When we need to ask for permission to do something, we should say ___________, because it sounds more polite. If you can do that, they will say ___________. If you can't do that, they will say ___________. Could I ...? Yes, you can No, you can't 用could提问，必须用____ or ____回答！ can can't Presentation After Cinderella finishes the chores, she is going to the party.She asked her stepmother for permission to do something. Let's think and fill in the blanks. ________________? Could I go to the party ______________________? Could I have a beautiful dress _______________________? Could I have a nice pair of shoes _____________________? Could I stay after 12 o'clock No, you _____. You have to be back before 12 o'clock. can't Presentation 3a Read the questions with can or could. Notice how they are answered. Then write R for requests or P for permission next to each question. We use ______________________ to ask for permission. We use ______________________ to make polite requests. Can / Could I do …? Can / Could you do …? What modal verb(情态动词) do these two kinds of sentences have in common? Make polite requests Ask for permission Ask for permission Make polite requests Presentation Let's explore(探究) the usage of modal verb(情态动词-could/can. 1. 含义：“能够， 可能” 2. could是can的_______，用在有礼貌地请求句子里语气比can更_____;3. 不能作____, 没有人称和数的变化，后加________. 情态动词could/can的基本用法 过去式 委婉 谓语 动词原形 (一)用于委婉提出要求或请求(make requests politely) Could you please...? Could/Can you please+_____...?意为 “能请你…吗？” V.原 Could you please ____ me fix up the bike? Could you please _________ here？ not smoke help 否定：Could you please+______+____...? 意为 “能请你(不)…吗？” not V.原 Could you please not put everything on the floor? 常见表示委婉请求的句型 ① Could you please + do sth.? ② Could you + do sth.? ③ Would you please + do sth.? ④ Would you + do sth.? ⑤ Would you mind + doing sth. ? 你介意……吗？ ⑥ Would you like + to do sth. ? 你愿意...吗? ⑦ What about doing sth. ? ......怎么样？ Discuss: How to answer? What can you find？ Presentation 情态动词could/can具体用法 探究“Could/Can you please”的回答 肯定回答： Yes, I ___. /Yes, sure. / Of course, I ____./All right. /Certainly. / No problem./I’d love to. /With _______. /That should be OK. can can pleasure 否定回答： Sorry, I ______. I have to ...; I’m afraid I ____. I am doing ... I’d ______, but I’m going to ... can't can’t love to Give the reason for refusal. --Could you please help me carry these boxes? --Yes, _____. /Sorry, I _____. My hands are full. sure can't 对别人的委婉请求的句子的回答，一般只用can,而不用could。 Presentation 情态动词could/can具体用法 (二)用于委婉请求许可(Ask for permission politely) Could/ Can I+________+其它？ 动词原形 Discuss: How to answer? 肯定回答： Yes, you ____. / Of course you ____. /Yes, please./OK./All right./ No problem./Sure, that should be OK. 否定回答：Sorry(No), you ____. You have to… /I'm afraid you ____.You must … /No, you mustn’t.You have … can can can't can't Give the reason for refusal. 常见表示请求允许的句型 ① May I + do sth. ?② Can I + do sth. ?③ Could I + do sth. ? ④ Might I + do sth. ?⑤ Do you mind if I + do sth. ? ⑥ Shall I/we + do sth.? Presentation 回答时：在回答用could 提出的请求时，通常不用 could而用 can。 例如： — Could I have a look at your book? — Yes, you can.(不能用Yes, you could.) — Sorry, you can’t.(不能用Sorry, you couldn’t.) 使用 could只是让请求更礼貌，但仍要注意说话时的语气和态度，面带微笑、语调温和会让你的请求更易被接受。 例如：Could I stay up a little later to finish this movie? 我可以晚点睡把这部电影看完吗？ 肯定回答：Yes, you can. But don't stay up too late.可以，但别熬太晚。 否定回答：No, you can't. You have to get up early tomorrow.不行，你明天得早起。 Presentation Could表委婉请求的用法 在表示请求帮助或请求许可的疑问句中，常用could代替can，表示礼貌，委婉或不确定的语气，而can则不具备这些语气。这时不能把could看作can的过去式。 could与can表达“提出请求”的区别 A. can表示一般性的请求，语气随便，常用于熟人之间或长辈对辈、上级对下级的场合； 1). Can you tell us your story, Tony ? 你能给我们讲讲你的故事吗，Tony？ B. could表示有礼貌的请求，语气委婉，常用于非熟人之间或晚辈对长辈、下级对上级的场合。 —Could you tell us if it snows in winter in Australia?请告诉我们，澳大利亚冬天下雪吗？ —Sure.当然可以。 Presentation Let's explore(探究) the other usage of modal verb(情态动词-could/can. 情态动词 can / could 情态动词can和could都可用于表示能力、请求允许和给予许可，以及提出请求和建议。 1. 表示能力 例如：Can you speak English? 你会说英语吗？ can 的过去时could，表示过去的能力，意为“能够，会” He could sing very well when he was young. 他年轻的时候歌唱得很好。 When I was five, I could swim like a fish. 我五岁时游泳游得像条鱼一样好。 （could 是can的过去式） 2. 表示对过去、现在或将来的某种猜测，表推测，但把握不大。意为“可能”。 He couldn’t/ can't be at the school then.那时他不可能在学校。 The book could be Lily’s because she likes reading books. 那本书可能是莉莉的，因为她喜欢看书。 Presentation Let's explore(探究) the other usage of modal verb(情态动词-could/can. 3.提出建议 对平级或晚辈可用 can，快速给出建议； 对上级、长辈或需要体现礼貌时用 could，避免显得生硬。 We can eat in a restaurant this evening. 今晚我们可以在餐馆吃饭。 用 can 提出直接建议（常用于口语，语气较随意） Maybe I could give you a lift to the supermarket. 也许我可以让你搭我的车去超市。 You could try reading the instructions before starting.你可以试着在开始前先读一下说明书。 用 could 提出委婉建议（语气更礼貌、含蓄，适合正式或陌生场景） Presentation Choose the best question to complete each conversation. 3b A. Could you give me a ride to town now? B. Can I stay out until eleven? C. Mr Lake, could I go to the toilet? D. Could I use your computer? A: ______________________________ B: Of course you can. A: ______________________________ B: Yes, if you are careful with it. A: ______________________________ B: No, you can’t. You have a basketball game tomorrow, remember? You need a good rest. A: Can I go to the movies? B: Of course. A: ______________________________ B: I can’t. I have to do some work now. C. Mr Lake, could I go to the toilet? D. Could I use your computer? B. Can I stay out until eleven? A. Could you give me a ride to town now? /ənˈtɪl/ prep. 到……时； 直到……为止 movie /ˈmuːvi/ n. 电影 Presentation 3c Make up conversations for each setting, using can or could. Can / Could I use your phone? Sure. / Of course. /ded/ adj. 不运行的；死的 take notes 做笔记 A: Can / Could I borrow your notes? B: Of course. Here are my notes. A: Can / Could you help me open the door? B: Sure. / Of course. A: Can / Could you bring gloves and rubbish bags for cleaning up the community? /ˈrʌbɪʃ/ n. 垃圾 /kəˈmjuːnəti/ n. 社区；社团 note /nəʊt/ n. 笔记；记录；便条 v. 注意；指出 清扫 [set] n. 场景 Presentation Choose one setting from your daily life, then make a long conversation using can or could. A: Ouch! I've fallen. B: Are you okay? That looks painful. A: My knee really hurts. Could I ask you to help me up? B: Absolutely. Do you think you can stand steadily? A: I'm not certain. Could I hold your hand for more support? B: Of course. Do you think you can walk? A: I don't know. Could you help me walk to that bench over there? B: No problem. Let's take it slow. For example Presentation Further thinking What are the benefits(益处) of using “make polite requests” and “ask for permission” in our daily life? Show good manners（礼仪） Build good relationships （关系） Get positive responses （回应） Presentation Summary know how to answer the questions. know the structures and functions of the sentences. know the difference between can/ could. After learning this lesson, I can Can/Could you…? (Make requests) Can/Could I…? (Ask for permission) 1. 用于请求或请求许可：could语气更委婉，有礼貌。 2. 用于表示能力：can表示现在的能力，could表示过去的能力。 肯定回答：Sure./ Certainly./ Yes, I can./ Of course./ No problem... 否定回答：Sorry, I can’t. I have to…/Sorry, I’m going to... 肯定回答：Sure./ Yes, you can./ Of course, you can. 否定回答：Sorry, you can’t./ I’m afraid you can’t. Presentation Presentation 一、根据汉语完成句子。 1. 你能帮我把这些照片挂起来吗？ you help me these photos? 2. 我可以借你的自行车用一下吗？ I your bike? 3. 请你帮我打扫一下客厅，好吗？ you please the living room? 4. 妈妈，我放学后能和同学一起去公园吗？ Mum, I go to the park with my classmates ? 5. 你能告诉我怎么到达那家花店吗？ you tell me that flower shop? Could Could Could could after school Could how to get to hang up borrow help me clean Presentation Sister: Look! The flowers are so beautiful! ___ Jim: ___, but you can buy some over there in the shop. Sister: Okay. ___ Jim: Here you are. Shop assistant: ___ Sister: I want to buy some flowers, please. Shop assistant: What colour would you like? Sister: I like red, pink and orange. Shop assistant: Okay. Look! They are so nice. Sister: ___ Shop assistant: Sure! 1. Could you give me ten yuan, please? 2. Can I help you? 3. Can I pick some of them? 4. I’m sorry, you can’t, 5. Could you please pack them up for me? 二、选择句子补全对话。 5 3 4 1 2 Presentation Must-do 必做 1.Review the usage of could and can. 2.Summarize the rules and usage of mainking polite requests and asking for permission. Choose to do 选做 Make up sentences to ask for permission and make polite requests. $