高考英语二轮语法专讲教案 第2讲 情态动词 篇一
In English grammar, modal verbs play an important role in expressing attitudes, opinions, and possibilities. Modal verbs include can, could, may, might, shall, should, will, would, must, ought to, and need. In this lesson, we will focus on the different uses of modal verbs and how to correctly use them in sentences.
1. Expressing Ability: Can and could are used to show ability. For example, "She can speak Spanish fluently" indicates that she has the ability to speak Spanish, while "He could swim when he was younger" suggests that he had the ability to swim in the past.
2. Expressing Permission: Can, could, may, and might can all be used to ask for permission or give permission. For instance, "Can I go to the bathroom?" and "You may leave early if you finish your work" are examples of using modal verbs to express permission.
3. Expressing Possibility: May, might, could, and must are used to show possibilities. For example, "It may rain tomorrow" and "He must be at the airport by now" suggest different levels of possibility.
4. Expressing Advice: Should and ought to are used to give advice or recommendations. For instance, "You should see a doctor if you're feeling unwell" and "You ought to apologize for your mistake" are examples of using modal verbs to offer advice.
5. Expressing Necessity: Must and have to are used to express necessity or obligation. For example, "You must wear a seatbelt in the car" and "I have to finish this report by tomorrow" indicate that something is necessary or required.
6. Expressing Future: Will and shall are used to talk about the future. For instance, "I will call you later" and "Shall we meet for lunch tomorrow?" are examples of using modal verbs to discuss future events.
By understanding the different uses of modal verbs and practicing using them in sentences, students can improve their English language skills and effectively communicate their thoughts and ideas. Modal verbs are versatile and can greatly enhance the clarity and precision of one's writing and speech.
高考英语二轮语法专讲教案 第2讲 情态动词 篇二
Modal verbs are an essential part of English grammar that help convey various attitudes, opinions, and possibilities. Understanding how to use modal verbs correctly can greatly enhance one's language skills and communication abilities. In this lesson, we will explore the different ways in which modal verbs can be used in sentences.
1. Expressing Politeness: Modal verbs such as could, would, and might are often used to soften requests or make them more polite. For example, "Could you please pass me the salt?" and "Would you mind opening the window?" are polite ways of asking for something.
2. Expressing Probability: Modal verbs like may, might, and could are used to indicate degrees of probability. For instance, "It may rain later" and "He might be late" suggest different levels of likelihood.
3. Expressing Past Ability: Could is commonly used to talk about past abilities. For example, "When I was younger, I could run faster" indicates that the speaker had the ability to run faster in the past.
4. Expressing Modality in Conditional Sentences: Modal verbs are often used in conditional sentences to express different degrees of possibility. For example, "If I had more time, I could finish the project" and "If I were you, I would apologize" are examples of using modal verbs in conditional clauses.
5. Expressing Future Intentions: Will and shall can be used to talk about future intentions or plans. For instance, "I will study harder next semester" and "Shall we go to the movies tonight?" are examples of using modal verbs to discuss future actions.
By mastering the different uses of modal verbs and practicing incorporating them into sentences, students can improve their language proficiency and effectively convey their thoughts and ideas. Modal verbs are versatile tools that can enhance the clarity and precision of one's communication, making them a valuable aspect of English grammar to learn and utilize.
高考英语二轮语法专讲教案 第2讲 情态动词 篇三
高考英语二轮语法专讲精品教案 第2讲 情态动词
高考英语二轮语法专讲精品
教案 第2讲 情态动词 来源：中学学科网 一.情态动词的定义 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谓语。 We can be there on time tomorrow. 我们明天能按时去那儿。 May I have your name? 我能知道你的名字吗？ Shall we begin now? 我们现在就开始吗？ You must obey the school rules. 你必须遵守校规。 情态动词数量不多，但用途广泛，主要有下列： can (could), may (might), must, need, ought to, dare (dared), shall (should), will (would) . 二.情态动词的位置 情态动词在句中放在谓语动词之前，谓语动词前若有助动词，则在助动词之前，疑问句中，情态动词放在主语之前。 I can see you. Come here. 我能看见你，过来吧。 He must have been away. 他一定走了。 What can I do for you? 你要什么？ How dare you treat us like that! 你怎么敢那样对待我们! 三.情态动词的特点 情态动词无人称和数的变化，情态动词后面跟的动词需用原形，否定式构成是在情态动词后面加“not”。个别情态动词有现在式和过去式两种形式，过去式可以用来表达更加客气、委婉的语气，时态性不强，可用于过去，现在或将来。 He could be here soon. 他很快就来。 We cant carry the heavy box. 我们搬不动那箱子。 Im sorry I cant help you. 对不起，我帮不上你。 四. 情态动词的语法特征： 1）情态动词不能表示正在发生或已经发生的事情，只表示期待或估计某事的发生。 2） 情态动词除ought 和have 外，后面只能接不带to 的不定式。 3）情态动词没有人称，数的变化，即情态动词第三人称单数不加-s。 4）情态动词没有非谓语形式，即没有不定式，分词等形式。 五.情态动词的用法 1. can (could) 表示说话人能, 可以, 同意, 准许, 以及客观条件许可, could 为 can 的过去式。 Can you pass me the books? 你能给我递一下书吗 ? Could you help me, please? 请问, 你能帮助我吗? What can you do? 你能干点什么呢? Can you be sure? 你有把握吗? can 和could 只能用于现在式和过去式两种时态，将来时态用be able to 来表示。 He could help us at all. 他完全可以帮助我们。 With the teacher’s help, I shall be able to speak English correctly. 有老师的帮助, 我将能准确地讲英语。 2. may (might) “可以”，表示说话人同意，许可或请求对方许可。 You may take the book home. 你可以把书带回家去。 May I come in? 我可以进来吗? May I use your dictionary? 我可以用你的词典吗? You may put on more clothes. 你可以多穿点衣服。 He said he might lend us some money. 他说他可以借给我们一些钱。 may 否定式为 may not, 缩写形式是 mayn’t。might 是may 的过去式，有两种用法，一种表示过去式，一种表示虚拟语气，使语气更加委婉、 客气或对可能性的怀疑。 He told me he might be here on time. 他说他能按时间来。 Might I borrow some money now? 我可以借点钱吗? He might be alive. 他可能还活着。 3. must “必须；应该；一定；准是”，表示说话人认为有必要做某事，命令、要求别人做某事以及对事物的推测。must 用来指一般现在时和一般将来时，过去式可用 have to 的过去式代替。 I must finish my work today. 我今天必须完成我的`工作。 You mustnt work all the time. 你不能老是工作。 Must I return the book tomorrow? 我必须明天还书吗? After such a long walk, you must be tired. 走了这么长的路, 你一定累了。 He must be the man I am looking for. 他一定是我要找的人。 He had to go because of somebody’s calling him that day. 那天他要走，因为有人叫他。 值得注意的是： （1）must + have + 过去分词，表示现在对过去事物的推测。 He must have told my parents about it. 他一定把这件事情告诉我父母亲了。 He must have received my letter now. 他现在一定收到我的信了。 Its six oclock already, we must have been late again. 已经六点钟了，我们一定又迟到了。 （2）must 和 have to 的区别: must 表示说话人的主观思想, have to “不得不,必须”，表示客观需要、客观条件只能如此。 You must do it now. 你必需现在就干。(说话人认为必须现在干) I have to go now. 我得走了。(客观条件必须现在走) You must be here on time next time. 你下次一定要按时来。 I have to cook for my child. 我得给孩子做饭。 4. need “需要”，多用在否定式或疑问句中. Need I attend the meeting tomorrow? 我需要明天参加会议吗? You need not hand in the paper this week. 这一周你不必交论文。 need 是一个情态动词，他的用法完全和其他情态动词一样，但 need 还可当作实义动词使用，这时 need 就象其他动词一样，有第三人称，单复数， 后面加带 to 的动词等特性。 I need a bike to go to school. 我上学需要一辆自行车。 Do you need a dictionary? 你需要词典吗? She needs a necklace. 她需要一条项链。 注意：“needn‘t + have + 过去分词” 表示过去做了没必要做的事情。 You neednt have taken it seriously. 这件事情你不必太认真。 5. dare “敢”，多用在否定或疑问句中。 The little girl dare not speak in public. 小女孩不敢在公众面前说话。 Dare you catch the little cat? 你敢抓小猫吗? dare 除用作情态动词外，更多的是当实义动词使用， 用法同实义动词一样，要考虑人称，单复数，时态等。 Do you dare to walk in the dark? 你敢黑夜走路吗？ He doesnt dare to tell the teacher what happened that day. 他不敢告诉老师那天发生的事。 6. ought “应当；应该”，后面跟带有 to 的动词不定式。 You ought to read these books if you want to know how to repair the motorcar. 如果你想知道如何修理汽车,你应该读这些书。 You ought to bring the child here. 你应该把孩子带来。 ought + to have done 句型。指过去动作,表示一件事情该做而未做。 You ought to have been here yesterday. 你昨天就应该来。 ought not to have done 句型。表示一件不该做的事情却做了。 You ought not to have taken the book out of the reading-room. 你不应该把书带出阅览室。 7. will (would) 表决心、愿望。 would 为 will 的过去式, 可用于各人称。 1）will表示经常性、习惯性、倾向性，would表示过去的习惯行为。 e.g. a. He will sit there hour after hour looking at the traffic go by. b.He would come to see me when he was in Beijing. 2）表示意志，决心或愿望。 e.g. a. Surely we will support all the people in the world in their struggle for peace. b. He would not let me try it . 3）表示对对方的请求，用于第二人称作主语的疑问句中，would的语气比will委碗,疑问句中一般用some, 而不是any。 e.g. a. would/will you kindly tell me the way to the station? b. Would you like some cake? 4）would like = want to 想要 Would like to do = want to 想要 e. g. a Would you like to go with me? 8. shall, should 表示命令, 警告, 允诺, 征求, 劝告, 建议, 惊奇。 shall的用法 用于第一,第三人称征求对方的意愿 e.g. a. What shall I wear on the journey? b. When shall he be able to leave the hospital? should 的用法 1)用于第一人称疑问句中询问对方的意愿，但语气较委婉温和 e.g. a. What should we do now? 我们现在该怎么办？ 2)表示应该、必须，常与must 换用。 e.g. a. We should (must) master a foreign language at least. 3).should 表示劝告，建议，命令，此时也可用ought to. 在疑问句中，通常用should代替 ought to. 4) should have done 表示过去应该做 而实际没有做 should not have done 表示过去不该做而实际做了． 9. have to＆must 1) 两词都是必须的意思，have to 表示客观的需要， must 表示说话人主观上的看法，既主观上的必要。 e.g. a. My brother was very ill, so I had to call the doctor in the middle of the night. (客观上需要做这件事) b. He said that they must work hard. （主观上要做） 2) have to有人称、数、时态的变化，而must只有一种形式。但must 可用于间接引语中表示过去的必要或义务。 e.g. a. He had to look after his sister yesterday. 3）在否定结构中： don’t have to 表示“不必” mustn’t 表示 “禁止” e.g. a. You don‘t have to tell him about it. b. You mustn‘t tell him about it. 10.need&dare 这两词既可做实义动词用，又可做情态动词用。作为情态动词，两者都只能用于疑问句，否定句和条件句。 need 作实义动词时后面的不定式必须带to，而dare作实义动词用时, 后面的to 时常可以被省略。 1) 实义动词:need+ n. / to do sth 2)
