2024届高三英语一轮复习语法专题之情态动词课件

Modal Verbs 版权声明:精品模板商业授权,请联系【锐旗设计】:https://9ppt.taobao.com,专业PPT老师为你解决所有PPT问题! 1 何为【情态】? 表明说话人的情感和态度, 反应说话人的微妙的心态变化 2 can /could may/might shall/should must will/would have/has to dare need used to 情态动词 表示推测 不表示推测 敢 需要 过去常常 汉 语释 义 ought to 能;请求 可能;请求 应该 将会/应该 必须 将要;请求 不得不 3 Part One 情态动词表推测 4 一、must 的用法 1.must 表示推测时, 只能用于肯定句。 e.g. There must be something wrong with the computer. e.g.You have worked hard all day. You must be tired. 2.must +be doing/do 表示对现在的动作进行肯定推测 e.g.They have bought a new car. They must have a lot of money. e.g. He must be reading novels now. 3.must +have done 表示对过去发生的事情作出的肯定判断 e.g.They are playing basketball, they must have finished their homework. 5 must 的易错点(1) 对现在或将来情况推测:must +动词原形。 must只能用于肯定。否定和疑问分别用can’t和can。 e.g. He must tell a lie. 否定句:He can’t tell a lie. 疑问句:Can he tell a lie ? 6 must 的易错点(2) He must be reading, _ he? You must do it yourself, _you? He must have gone over the article,_ he? It must have rained last night, _ it? 表猜测语气的反意疑问句的构成 isn’t don’t hasn’t didn’t 7 二、can/could 的用法 1. can /could 表示推测时,只能用在否定句或疑问句中。 e.g. It’s so late. Can Tom be reading? e.g. She couldn’t be telling lies. 2. can't/couldn't have done 对过去发生行为的可能性进行推测: e.g. I saw him just now so he couldn’t have gone abroad. e.g. She couldn’t have been at home. 3. can/could have done “本可以,本来可能已经”用于肯定句中,表示对过去发生的事情做出的判断. e.g. You could have had a better mark. 8 三、may/might 的用法 1.may/might 表示推测时,只能用于陈述句,表示对现在或将来要发生的动作把握不大。 e.g. They may come here tomorrow. e.g. They may be still waiting for us. 2.might/may have done,表示对过去发生的动作进行可能性推测。 e.g. He may have gone to the clinic. e.g. He might have read about the news in the newspaper. 9 表示推测——情态动词的重要用法 肯定的推测 可能的推测 否定的推测 疑问的推测 情态动词 + V. + V. + have done 常见must be + be doing + V. + V. + have done + be doing 可以用not表示“可能不” +V. + V. + have done + be doing + V. + V. + have done + be doing must may, might can’t, couldn’t can, could 对将来 对现在 对过去 10 1. I don't know where she is, she _ be in Wuhan. 2. At this moment, our teacher _our exam p