(
课件网) 九年级 下册 M4U3 Language in use What suggestions can you give to people walking in the mountains 1. The visitors should wear a hat. 2. Don’t walk along the edge. 3. They’d better take some food and water. 4. They should wear comfortable shoes. … You must be careful of falling stones. You mustn’t walk too close to the edge of the hill path because you might fall and hurt yourselves. You should always wear proper clothes. Bears might think our rubbish is food. -- Can we go rock climbing -- No, you can’t. Read and pay attention to the colored words. 思考？ 你记得学过哪些主要的情态动词吗？ 1 2 情态动词有哪些语法特征呢？ can. could, may, must，might, have to… 3 情态动词如何使用呢？ 1. 情态动词_____具体的词义。 2. 情态动词_____人称和数的变化。 3. 情态动词后必须跟_____，两者 一起构成谓语动词。 4. 一般疑问句提前边，否定句在后直接加 not. 有 没有 动词原形 can / can’t 1. 表示能力 (会) 1) Mary can speak English, but she cannot/ can’t speak French. 2) Can you lift this heavy box 3) Can you skate 2. 表示允许 (可以) 1）Can I use your dictionary 2）-- Can I go home now -- Yes, you can. / No, you can’t. could 1. 是can 的过去式； 表示过去的能力； He could ride a bike at the age of five. 2. 用于婉转语气,多用于问句。“能，可以” Could you please clean the room -- Could I come to see you tomorrow -- Yes, you can. ( No, you can’t. ) 此处 could 不是过去式，只是语气更委婉，答语中不能用could couldn’t，要用can 和 can’t。 may / may not/ might 1. 表示请求和允许 (可以), 比can 正式. May I come in He may come if he likes. may的用法: may / may not/ might 2. may的一般疑问句，其否定回答用 can’t 或 mustn’t。 1. --May I go home now --Yes, you may. / Sure. / Yes, please. No, you can’t./ mustn’t. 2. --May I use your washroom now --No, you _____. There’s something wrong with the toilet. A. needn’t B. mustn’t C. shouldn’t D. didn’t B might / may/ might 3. might 1. 是 may 的过去式。 2. 表示推测, 可能性较小。 1) He might be very busy now. 2) Your mother might know the truth. may 也表示猜测，意为“可能”。 3) Where is my English book It might / may be in your desk. must / mustn’t 1. must 必须 ,表示说话人的主观意志。 You must do your homework first. 2. mustn’t 不准，表示禁止 You mustn’t smoke here. You mustn’t play with fire. must / mustn’t 4. 以must开头的疑问句， 肯定回答：Yes , …must. 否定回答: No, … needn’t. 或 No, … don’t have to. -- Must I clean the classroom now -- Yes, you_____ . -- No, you _____ . / No, you _____ . must needn’t don’t have to 1. need作情态动词，主要用于疑问句和否定句中 2. need 一般疑问句: 肯定回答用 Yes, … must， 否定回答用 No,…needn’t . 或 No,…don’t have to. 如： Need I do it now Yes, you _____。 No, you _____ . 【注意】need 作行为动词，有人称、数和时态的 变化后接to do， 即 need to do sth. need must needn’t / don’t have to Ⅰ.用适当的情态动词填空： 1. I can play football. _____you swim 2. I can’t play with you. I _____finish my homework first. 3. I_____ get up ... ...
