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课件网) Module 11 Module 11 Way of life Unit 3 Language in use To summarise and consolidate the use of must, mustn’t, need, needn’t, can and can’t when talking about customs and social behaviours To consolidate the use of some words and expressions To learn to give advice using modal verbs 1. You _____ (必须) say Mr and Mrs when you meet someone for the first time. 2. You _____ (可以) take it away. 3. You _____ (不能) break anything. 4. You _____ (不需要) wait! mustn’t can must needn’t Complete the sentences. 1. You can open it! 2.You mustn't do any cleaning on the first day of the Spring Festival. 3. When you get to know each other better or when they ask you to, you can just use their first names. 4. You can buy it and eat it in special fish and chip shops on the high street. 5. At the bus stop, you must not push your way onto the bus. 6. You’d better not have your hair cut during the Spring Festival month. Read the following sentences and pay attention to the words in red. 情态动词must, can, need等 1. must v. aux. 必须；一定要 表示义务、责任或命令等或有必要、有义务做某事。 否定形式：must not = mustn’t 不许，禁止，千万不要 由must构成的一般疑问句的肯定回答用must，否定回答用needn’t或don’t have to。 e.g. You must do it by yourself. You mustn’t swim in the river. —Must I go now —Yes, you must. / No, you needn’t / don’t have to. must和have to must 强调说话人的主观看法, 认为有必要或有义务做某事。 没有人称、数和时态的变化。 have to 强调客观上的必要性，常译为“不得不”。 有人称、数和时态的变化。否定形式为：do not (don’t have to)，表示“不必”。 e.g. You mustn’t tell him about it. 你绝对不要告诉他这件事。(可能是秘密) You don’t have to tell him about it. 你不必告诉他这件事。(他可能知道了或没有必要让他知道) 2. can v. aux 能; 会; 可以 表示现在或将来的能力或者请求、允许。 否定形式: cannot (can’t)，表示“不能；不可以”，语气弱于must not (mustn’t)。 由can构成的一般疑问句的肯定回答用can, 否定回答用can’t。 e.g. The little boy can speak three languages. You can’t put the milk in first. — Can I have a look at your photo — Yes, you can. / No, you can’t. 3. need v. aux 需要 否定形式: need not(needn’t)，表示“不需要；不必要”。 在回答由need引起的一般疑问句时，肯定回答常用must，否定回答常用needn’t。 e.g. If she wants anything, she need only ask. You needn’t finish it before 3 o’clock. —Need we come —Yes, you must. / No, you needn’t. 4. had better had better 表示劝告或建议，意为“最好……”。 e.g. You’d better get some sleep. 你最好睡一会儿。 had better一般不用疑问句中，但可用于否定句中，其否定形式为 had better not。 e.g. You’d better not waste any more of your time. 你最好别再浪费你的时间了。 1. —Would you like to visit Tianjin University tomorrow —Sorry, I’m afraid I _____, I’ll work as a volunteer (志愿者) in my community. A. can B. can’t C. must D. mustn’t (2023天津) 2. If we _____ find a better way, we'll finish the job faster. A. can B. can't C. must D. mustn't (2023 ... ...
