Unit 9 Section A 3a-3c（ 课件）-2024-2025学年人教版英语八年级上册

Unit 9 Can you come to my party? Section A 3a-3c must“必须” 没有人称和数的变化。 must 否定 needn’t/don’t have to 不必 We must arrive home before 10. 否定句______________________________ 疑问句______________________________ 肯/否定回答__________________________ We needn’t(don’t have to) arrive home before 10. Must you arrive home before 10? Yes, we must. No, we needn’t/ don’t have to. mustn’t 表示禁止语气强烈。 must/have to 情态动词 含义及用法 例句 must have to I must study hard to get good grades. The TV doesn’t work,we have to buy a new one. 主观上的“必须” 客观需要，即“不得不” 3a Complete the answers with might and one of the phrases in the box. watch TV on the weekend my cousin visit my grandparents practice the violin 1. A: What are you going to do on Saturday? B: I’m not sure. I might _____________________ 2. A: What are you planning to do after school? B: I don’t know. _________________ visit my grandparents. I might watch TV. 3. A: When will you finish the science homework? B: _____________________________________________ 4. A: Who are you going to the movies with? B:______________________________________________ 5. A: Are you free to come to my place on Saturday? B: ______________________________________________ I don’t know. I might finish it on the weekend. I’m not sure. I might be going with my cousin. I’m not sure. I might have to practice the violin. 3b Complete the sentences below. Use the words in brackets to help you. Inviting: _________________________________(can / play tennis) Accepting: _____________________________________________ 2. Inviting: ______________________________________ (would like to / go to the movies) Refusing: ______________________________________________ Reason: __________________________________(might have to) Can you play tennis on Saturday? Sure. That sounds great. Would you like to go to the movies on Friday? Sorry, I’m not available. I might have to go out with my parents. 3. Inviting: _______________________________ (can/hang out with us tonight) Refusing: ________________________________ Reason: ________________________________ (must) 4. Inviting: _____________________________________ ( would like to / come to my birthday party) Accepting: _______________________________ Can you hang out with us tonight? Sorry, I’m not free. I must study for a test. Would you like to come to my birthday party? Sure,I’d love to. 3c Write down everything you have to do next week. Choose a day and time to have a party. Then invite classmates to your party. A: Can you come to my party? B: When is it? A: Next week, on Thursday night. B: I’m sorry. I have to study for a math test. MON. TUE. WED. THUR. FRI. SAT. SUN. go to the movies at night visit my grandpa in the afternoon look after my sister in the evening prepare for the chess game at night study for a test all day Language point 1. Invite invite invite sb. to + a party/wedding … 邀请某人参加聚会/婚礼…… invite sb. to do sth. 邀请某人做某事 My best friend invited me to her birthday party. Yesterday Anna invited me to watch the film. 拓展延伸：invitation n. 请柬；请帖；邀请 Language point 2. accept v.接受 accept 接受 表示主观上愿意接受 receive 收到 表示客观上收到，但不一定会接受 I received a gift, but I didn’t accept it. 我收到了一个礼物，但是我没有接受。 Language point 3. refuse v.拒绝 refuse作动词，与accept互为反义词。 refuse to do sth. “拒绝做某事”。 Jenny refused my help politely. The children refused to give up hope when in trouble. LEAD IN IN Christmas is coming.Anna is going to have a party and invite her friends to come. How to invite friends? Can you come to my Christmas party? Would you like to come to my Christmas party? Could you come to my Christmas party? How to accept? Sure, I’d love to. It sounds great. Sure, thanks for asking. Sure, thanks for your invitation. How to refuse? Sorry,I’m not available. I must prepare for an exam. How to refuse? Sorry,I can’t. I plan to go bike riding. How to refuse? I’d like to, but I might have to go to the doctor. How to refuse? I am afraid not. I am going to hang out with my friends. How to refuse? Sorry,I ’m not free. I have to take piano lessons. That sounds great. Sure, I’d love to.(to不能省略) I’m afraid not. Sorry, I’m not free/available. Sorry, I can’t. Accept the invitation Refuse the invitation I’d like to, but I have to/must ... Thanks for asking/your invitation. Can you come to my party on Saturday? Sure, I’d love to./Sorry, I must study for a math test. Can you go to the movies tomorrow night? Sure. That sounds great. I’m afraid not. I have the flu. Can he go to the party? No, he can’t. He has to help his parents. Can she go to the baseball game? No. she’s not available. She must go to the doctor. Can they go to the movies? No, they’re not free. They might have to meet their friends. Grammar focus 情态动词 can表示邀请。 句型结构：Can+主语(you)+动词原形+其它? 例如：Can you come to my party? Can you go shopping with me? How to make an invitation? Summary 有时can也可以换成could,用could更礼貌。 can是一个常见的情态动词，表示说话人的 语气或情态，基本意思是“能；会”。它没有人称和数的变化，在句子中不能单独作谓语，其后必须跟实义动词原形。 Summary can可以表示邀请。表示邀请时，could比can更礼貌、更委婉。同时，can还有其他用法。 1. My brother can swim but I can’t. 表能力，“能够；会” 2. Can I read your new book? 表许可，“可以；能够” 3. The book can’t be Jack’s because his is blue. 表推测，常用于否定“不可能”或者疑问句“可能” Watch and sum up 1. I can speak English.（ ） 2. Jim can drive but I can’t.（ ） 3. Can I have a cup of tea, please?（ ） 4. You can go out.（ ） 5. Who sent the gift? Can it be your brother?（ ） — It can’t be my brother. He is still in France.（ ） 6. Can you come to my party?（ ） 许可 邀请 推测 能力 能力 能力 许可 许可 推测 推测 邀请 Summary 情态动词有：may/might, can/could, must, have to, shall/should, will/would, need等。 不能独立作谓语，只能和动词原形一起构成谓语 没有人称和数的变化。 (have to除外) 否定形式：在其之后加not (have to除外)。 疑问形式：情态动词提到主语之前 (have to 除外)。 may/might 情态动词 含义及用法 例句 may/ might 可能 可以 Might I ask you a question? The report says that it might rain． He said he might come tomorrow. 表示请求，许可，意为“可以”，语气比may更委婉。 表示推测，意为“可能”，语气较委婉，可能性低于may。 may的过去式, 意为“可能” have to的意思是“必须、不得不”强调由于客观 原因而必须做某事。性质如下： have to have to 后接动词原形； have to有人称、数和时态的变化； 第三人称单数形式为has to,过去式是had to； 疑问形式和否定形式要借助于助动词do, does或did 1.Tom has to go home on foot. 否定句______________________________ 疑问句______________________________ 肯/否定回答__________________________ Tom doesn’t have to go home on foot . Does Tom have to go home on foot ? Yes,he does. / No, he doesn’t. Practice Practice 2. Lily had to go home on foot last night. 否定句______________________________ 疑问句______________________________ 肯/否定回答__________________________ Lily didn’t have to go home on foot last night. Did Lily have to go home on foot last night? Yes, she did. /No, she didn’t. 单项选择 1. — ______ you come to my house to watch the baseball match on TV? —Sure, I’d love to. A. May B. Must C. Should D. Can 2. — Today is my birthday. Can you come to my party tonight? — ______, but I should finish my homework first. A. That’s too bad B. Yes, please C. No, I don’t know D. I’d love to D D exercise 3. —Why didn’t you come to my party? —I _____stay at home，because my mother was ill. A. has to B. have to C. had D. had to 4. They were afraid that it _____ rain the next day. A. must B. should C. might D. may 5. She ______ my invitation because she wasn’t available. A. rewarded B. accepted C. refused D. received D C C exercise 6.Harry invited me ______ with him when his parents were out of town. Stay B. stayed C. staying D. to stay 7. —Could you come back home for dinner? —______. I’ll be at a very important business meeting at that time. A. I think so B. I’m afraid not C. Yes, I hope so D. I’m afraid so D B exercise $$