Unit 5 The Value of Money Discovering Useful Structures 课件-2022-2023学年高一英语人教版（2019）必修第三册

Discovering useful structures Unit 5 The Value of Money 1 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”. 2 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 5 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 8 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