Unit 5 The Value of Money Discovering Useful Structures ppt课件-(2021新)人教版高中英语必修第三册高一下学期.pptx
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1、新新人教必修人教必修Book 3 Unit 5 The Value of MoneyDiscovering Useful Structures P54 Leading-inMay we ask what youre doing in this country and what your plans are?I cant say that I have any plans.You mustnt worry about that.Could you offer me work here?Read the sentences below and think about:What are the fu
2、nctions and meanings of these modal verbs?Modal verbs have many functions, including the following (A-F). PresentationA. necessity B. possibility C. obligation D. request E. advice F. intentionFind modal verbs in previous sections and discuss their functions. Read the passage and fill in the blanks
3、with suitable modal verbs in the box. may must can ought to might had better would shouldIn the film The Million Pound Bank Note, Henry Adams is stuck in a foreign country without money and friends, and with nowhere to stay. While this situation _ seem unusual, it can sometimes happen to travellers.
4、 In case it happens to you on a trip abroad, what _ you do? First, and most importantly, you _stay calm. Fear _ cause you to become confused. You need to thinkmayshouldmustcanRead the passage and fill in the blanks with suitable modal verbs in the box. may must can ought to might had better would sh
5、ouldclearly. Second, you should go to your nearest consulate. They _ be able to help to some extent. Third, you _ do well to check with some local charities. They _offer help to travellers in need. Fourth, you _avoid getting into trouble. You _ think that stealing some money or food would help you,
6、but you should not do so. Getting caught _ ruin your life.ought towouldmighthad bettermightwouldI. Review of modal verbsGrammar一、情态动词的语法特征1.1.情态动词可以表示可能、建议、愿望、必要、情态动词可以表示可能、建议、愿望、必要、 允许、能力等。允许、能力等。 2.2.情态动词没有人称和数的变化。情态动词没有人称和数的变化。3.3.情态动词必须和实义动词一起构成谓语。情态动词必须和实义动词一起构成谓语。4.4.情态动词除情态动词除ought和和have外,后面只
7、能接不带外,后面只能接不带to的不定式。的不定式。5.5.情态动词没有非谓语形式,即没有不定式、分词情态动词没有非谓语形式,即没有不定式、分词等形式。等形式。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: 二、情态动词的分类can/could, may/might, ought to, mustneed, dare/daredshall/should, will/wouldhave to, used to2. must 表示必须、必要。回答表示必须、必要。回答must引出的问句时引出的问句时, , 如果是否定的回答如果是否定的回答, , 不能用不
8、能用mustnt,而要用而要用 neednt 或或 dont have to。三、情态动词的用法must, have to Must we hand in our exercise books today? Yes, you must. (No, you dont have to.)1. must 表示推测时,表示推测时, 只能用于只能用于肯定句肯定句。There must be something wrong with the computer.You have worked hard all day. You must be tired.3.have to和和must均表示均表示“_”,但
9、,但_是指说话人的主是指说话人的主观看法,而观看法,而_则强调客观需要。则强调客观需要。 I have to wait here because I have no umbrella with me. I must recite the text this morning.can/could1. can /could 表推测表推测, 只能用在只能用在否定句或疑问句中。否定句或疑问句中。Its so late. Can Tom be reading?She couldnt be telling lies.*对对过去发生的过去发生的行为进行推测时,常用行为进行推测时,常用can/could hav
10、e done的否定或疑问形式。的否定或疑问形式。The door was locked. She couldnt have been at home.必须必须musthave to2. can /could 表能力,表能力,can表示现在的能力,表示现在的能力,could表表示过去的能力。示过去的能力。 I can read this chinese article.She could play the piano at the age of five.* *can表示能力时,还可以用表示能力时,还可以用be able to代替。代替。 be able to后接动词原形,可用于大多数时态。后接
11、动词原形,可用于大多数时态。I will be able to speak French in another few months. They were able to escape from the building.3. can /could 表许可,表许可,could语气更委婉。语气更委婉。 Can I come in?Could I borrow your pen?may/might1. 表示推测时表示推测时, 只能用于只能用于陈述句陈述句, 可以指现在,也可以可以指现在,也可以 指过去,指过去,且可能性不大。且可能性不大。They may come here tomorrow.He
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