新概念一Lesson61~62.ppt

Must 的用法 I have a bad cold, and I must see a doctor. He has a bad cold, and he must see a doctor. Must情态动词， 后面加动词的原型, 变否定为mustn’t 我们必须努力学习。 他必须躺在床上。 她不应该在图书馆里讲话。 他们不应该吃骨头。 We must study hard. He must stay in bed She mustn’t talk in the library. They mustn’t eat bone. 情态动词表示说话人对某一动作或状态的态度。 情态动词的特点： 1）有一定词义,但必须与实义动词原形一起出现； 2）没有人称和数的变化； 3. must modal verb 情态动词有三个，can may must ，后 加动原别忘记。Can、 may 表能会， 征求对方的意见。 May I 开头较婉转。must 表必须，否定回答 needn’t。 情态动词提前构成一般疑问句， 情态动词后加not 构成否定句。 must表示义务,命令或必要性，意思是“应该、必须”。 如： 你现在必须睡觉了。 must的否定句根据句意有两种变化， ①needn’t表示不需要，②mustn’t，意思是“不应该、禁止”，语气较强烈。 如： 你不许在图书馆里吸烟。 You must get up at 6:00from Monday to Friday. You mustn’t smoke in the library. She must do her homework first. 否定句： She needn’t do her homework first. 一般问： Must she do her homework first？ Yes, she must. /No, she needn’t. must 必须 /推测 Its time to go to school, you must go now. She must be tired. We must study hard . You must stay in bed for three months. must 表示主观，必须 have to 表示客观，不得不 eg: I must be off. eg: I have to be there early. must VS have to need （动词）需要 I need to water the flower. Fish need water. need to do sth.需要做某事 need sth. 需要某物 has a bad cold Jimmy What’s the matter with him ? feels ill If you are the doctor ,what will you suggest? stay in bed take some medicine drink much water …… ---How do you feel ? ---I feel ill. ---You must have a cold. ---What medicine must I take, doctor? ---You can take some aspirin. ---What must I do? ---You must stay in bed and have a good rest. ---When can I go to school? ---Nest Monday. A bad cold What’s the matter with them? What must we do? I must______. What must he do ? What must they do ? Listen to the tape Question : 1. Where is Jimmy ? 2. What’s the matter with him ? 3. Can you remember the doctor’s telephone number ? 4. What must he do ? 5. What is good news for Jimmy ? Listen to the tape, then answer the question. 1. What’s the matter with Jimmy today? 2. What’s the doctor’s telephone number?