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课件网) 【知识精讲】情态动词 初一 英语 发布课文朗读任务 （任务-发布任务-自定义任务） 概念：情态动词是一种本身有一定的词义，表示说话人的情绪、态度或语气的动词，但不能单独作谓语，只能和其他动词原形构成复合谓语，没有人称和数的变化。 情态动词数量不多，但用途广泛，主要有： can (could), may , must等。 I can speak English/Chinese. Can you speak English/Chinese Yes,I can./we can. No,I can't/we can't. What can she do She can play basketball. She can't play basketball. Can she play basketball Yes, she can. No,she can't. can的用法 1. 表示能力(会) Can you play basketball Yes, I can. No,I can't. Mary can speak English, but she can not speak French. 2. 表示许可(可以） Can you help me You can smoke here. 情态动词的基本用法 may的用法 1. 表示允许(可以) ，此时与can可以互换使用 —May I go home now —Yes, you may. No, you can’t. 2. 表示推测 (可能) She may be a teacher. must的用法： 1.must 表必须 You must do your homework first. 2. mustn’t 表示禁止(不准；不允许) You mustn’t smoke here. 3.must开头的疑问句. — Must I clean the classroom now — Yes, you must. No, you needn’t. have to 和must的用法不同 一、have to 表客观的需要和义务，must 表主观的认识。 I missed the train, so I had to take a taxi. （客观上需要打的） I must study hard. （主观上认为应该努力学习） 二、在疑问句和否定句中，have to 多用助动词 do 构成，must 则直接提问或加not。 Does he have to do it Yes, he does. No, he doesn't. Must he do it Yes, he must. No, he doesn't have to. You don't have to go there. You mustn't go there. 句型转换 She can play the guitar.(变成一般疑问句） _____ she_____ the guitar 句型转换 She can play the guitar.(变成一般疑问句） _____ she_____ the guitar 答案：Can play 解析：含情态动词can的陈述句，变一般疑问句，直接将can提到句首。 考点：情态动词can的用法 You _____ go and see a doctor at once because you look so weak. A.can B.may C.must D.will You _____ go and see a doctor at once because you look so weak. A.can B.may C.must D.will 答案：C 解析：根据句意，此处must表示“必须”较为恰当。 考点：情态动词
