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课件网) Discovering useful structures Unit 5 The Value of Money Learning objectives 1. To identify the different functions of modal verbs. 2. To talk about future events in the past using “would do” and “was / were going to do”. Modal verbs 情态动词 Leading-in May we ask what you're doing in this country and what your plans are I can't say that I have any plans. You mustn't worry about that. Could you offer me work here Look at the words in red. What kind of words are they Why does the speak use this words modal verbs Summary: The function of modal verbs is to express modality (feelings and attitude). may / might must / have to shall / should will / would ought to need / dare can / could What modal verbs do you know modal verbs 1.只作情态动词的： 2. 可情态可实义的： 3. 可情态可助动词的: 4. 相当于情态动词的: 情态动词的分类 can/could, may/might, ought to, must need, dare/dared will/would，shall/should, have to, used to，had better，used to 情态动词有一定的意义， 大多数情态动词有多个意义。 necessity 必要性 possibility可能性 obligation责任义务 request请求 advice建议 intention意图 情态动词没有人称和数的变化，即不随主语的不同而变化。 3. 情态动词不能独立使用，须后接动词原形，一起构成谓语。 情态动词的定义 情态动词 (Modal verb) What kind of feelings or attitude is expressed You have to read between the lines because the real messages are often hidden… It may seem lucky to you. Astronauts must wear spacesuits when they work in space because… May we ask what you’re doing in this country You should/ought to/had better go to class right away. What would you do if you were in her situation necessity 表必要性 possibility 表可能和推测 obligation 表责任义务性 request 表请求或指示 advice 表建议 intention 表意图和愿望 Functions modal words: A. necessity B. possibility C. obligation D. request E. advice F. intention Analyze what the modal verbs express. 1. Henry must be an American. 2. Henry can be an American. 3. Henry could be an American. 4. Henry may be an American. 5. Henry might be an American. Possibility Modal verbs used to express possibility: must, can, could, may, might Degree of possibility High Low Analyze what the modal verbs express. 1. You must come at once. 2. We have to wear uniforms at school. 3. I ought to be on my way. Necessity & Obligation Modal verbs used to express necessity & obligation: must, have to, ought to 除了上述结构，be going to、be about to等结构也用在过去将来时中，如： They were going to find someone to take part m their bet when they saw Henry walking on the street outside. 他们正准备找一个人來参与他们的赌局。这时，他们看到亨利走在外面的大街上。 Mrs Thomson was about to sit down to watch the opera when her phone rang. 场姆森夫人刚要坐下看 剧的时候，她的电话响了。 Learn Learn 3. Both would do” and was/were going to do can be used to talk about future events or intentions in the plete the following sentences that describe the future using either form of the given verb ... ...
