Unit 4第三课时 Grammar 教学设计 2025-2026学年外研版八年级英语下册

Unit 4 Helping Out第三课时   I. Teaching Aim 1- Grammar Mastery: Master the usage of modal verbs must, may, can to express: 2- Skill Improvement: Use modal verbs correctly in dialogues, sentences and real-life communication about helping others 3- Understand that small acts of kindness can make a big difference II. Key & Difficult Points - Key Points: 1. Master the basic usage and differences of must, may, can 2. Complete the textbook exercises correctly 3. Use modal verbs in real-life communication about helping others - Difficult Points: 1. Distinguish may (possibility) and can (possibility/ability) in context 2. Use modal verbs flexibly and naturally in oral and written output III. Teaching Aids Textbook, PPT, whiteboard, worksheet, picture cards, scenario pictures   IV. Teaching Procedures (40 Minutes) Step 1: Warm-up & Lead-in (5 mins) 1. Review the Reading Text (3 mins): - Ask students to recall the story of Leah: What did Leah do to help sick children? What difficulties did she face? - Extract 3 sentences with modal verbs from the text and write them on the blackboard: ① Crayons may carry viruses and spread diseases. ② It can be boring to wait for X-rays and treatments. ③ There must be something for me to do. - Ask: What do these three verbs have in common? What different meanings do they express? 2. Topic Introduction (2 mins): - Say: Today we will learn the usage of these three modal verbs: must, may, can. We will use them to talk about helping people around us, just like Leah did.   Step 2: Grammar Rule Exploration (10 mins) 1. Rule Analysis (6 mins): - Guide students to analyze the 3 sentences and summarize the usage: Modal Verb Usage Example must 1. Strong certainty (肯定推测) 2. Obligation (必须) ① There must be something for me to do. ② You must wash your hands before eating. may Possibility / uncertainty (可能性，不确定) Crayons may carry viruses. can 1. Ability (能力) 2. Possibility (客观可能性) 3. Offer (主动提供帮助) ① I can help you. ② It can be boring to wait. ③ We can share our notes with her. - Emphasize the key difference: may is used for subjective uncertainty, can is used for ability or general possibility. 2. Find More Examples (4 mins): - Ask students to find more sentences with must, may, can in the reading passage Adding Some Colour, and share them with the class. - Check and explain the usage in each sentence to consolidate understanding.   Step 3: Grammar Practice (15 mins) 1. Exercise 6: Complete the sentences (5 mins) - Ask students to complete the sentences individually: 1. You ______ be thirsty now after the long run. Here is a bottle of water for you. 2. You didn’t bring an umbrella? Take mine. It ______ rain later. 3. Here is my notebook. You ______ return it after the exam. - Check answers and explain the logic of each choice. 2. Exercise 7: Complete the dialogues (6 mins) - Ask students to complete the 3 dialogues with the correct modal verbs: Dialogue 1 A: Look at that man! It ¹______ be hard for him to carry all the boxes! B: Let’s give him a hand. Dialogue 2 A: That woman looks lost. She ²______ need help. B: Yes. We ³______ go and ask her. Dialogue 3 A: Is that Lily over there? B: It ⁴______ be her. She has the flu and has to stay at home. A: That’s too bad. The lesson today is really important. B: Don’t worry. We ⁵______ share our notes with her. - Invite students to read the dialogues aloud in pairs to practice oral English. 3. Quick Challenge (4 mins) - Show 5 quick sentences, ask students to choose the correct modal verb: 1. I ______ help you with your English. (can / may) 2. The light is on. He ______ be at home. (must / can) 3. It ______ rain this afternoon. Let’s take an umbrella. (may / must) 4. You ______ finish your homework before playing games. (must / can) 5. She ______ be hungry. She didn’t eat breakfast. (must / may) - Check answers and explain to consolidate the rules.   Step 4: Post-reading & Output Practice (8 mins) 1. Pair Work: A Helping Hand (5 mins): - Guide students to use the textbook’s "A helping hand" structure and Useful expressions to discuss helping others, with modal verbs: - Who needs your help? (e.g., My deskmate / The elderly in the community / Sick children) - Why do they need help? (e.g., He may find it a challenge to learn English. / They need a helping hand.) - What can you do to help? (e.g., I can help him with his homework. / There must be something for me to do, such as raising money.) - Example dialogue: A: Who needs your help? B: My deskmate may find it a challenge to learn English. A: What can you do to help? B: I can help him with his grammar. We must practice every day. - Invite 2-3 pairs to present their dialogues. 2. Think & Share (3 mins): - Ask: What can we learn from Leah? How can we use modal verbs to talk about helping others? - Guide students to use modal verbs to express their ideas, e.g., We can help people in need. We must be kind to others. Small acts may make a big difference.   Step 5: Summary & Homework (2 mins) 1. Summary (1 min): - Recap the usage of must, may, can and their differences. - Emphasize the theme: We can use these modal verbs to talk about helping others, just like Leah. Kindness can change lives. 2. Homework (1 min, layered design): - Basic: Copy the grammar rules and complete the textbook exercises; recite the 3 dialogues. - Intermediate: Write a short paragraph (80 words) about "How I can help others", using at least 3 modal verbs (must, may, can). - Advanced: Create a 5-sentence dialogue with your partner about helping a classmate, using all three modal verbs. V. Blackboard Design Unit 4 Grammar: Modal Verbs (must / may / can) ✅ must: ① strong certainty (肯定推测) ② obligation (必须) ✅ may: possibility / uncertainty (可能性，不确定) ✅ can: ① ability (能力) ② possibility (客观可能性) ③ offer (主动帮助) ❗ Note: 否定推测用 can't (不用 mustn't) 学科网（北京）股份有限公司 学科网（北京）股份有限公司 $