Unit 5 Discovering Useful Structuresppt课件-（2021新）人教版高中英语必修第三册.pptx

1、EliseU n i t 5 T H E V A L U E O F M O N E YD i s c o v e r i n g U s e f u l S t r u c t u re s1Experience the functionsExperience the functionsReread the passage and pay attention to the usage of the bold words.Experience the functionsHow many modal verbs do you know? And what are they?may / might

2、must / have toshall / shouldwill / wouldought toneed / darecan / couldMindmap of the modal verbs modal verbsExperience the functions We use modal verbs to talk about A. ability or will（能力或意愿）（能力或意愿） B. prohibition（禁止）（禁止）C. making suggestions（建议）（建议）D. certainty or inference（可能性或推断）（可能性或推断）E. polite

3、ness or euphemism（客气或委婉）（客气或委婉）F. obligations or expectations（义务或预期）（义务或预期）1. Oliver believes that with a million pound bank note a man could live a month in London. ( )2. Young man, would you step inside a moment, please？( )3. May we ask what youre doing in this country and what your plans are? ( )

4、4. Well, I cant say that I have any plans.( ) 5. Well, you mustnt worry about that. ( )6. You mustnt think we dont care about you. ( )7. Well, it may seem lucky to you but not to me! ( )8. Now if youll excuse me, I ought to be on my way. ( )9. Oh, no, youd better not open it. ( )Experience the funct

5、ionsChoose the use of modal verbs in the following sentences.能力或意愿能力或意愿能力或意愿能力或意愿客气或委婉客气或委婉客气或委婉客气或委婉禁止禁止禁止禁止可能性或推断可能性或推断义务或预期义务或预期建议建议2Compare and conclude He can use the computer skillfully now, but he couldnt last year. Training by oneself in a gym can be highly dangerous. Can / Could I have a lo

6、ok at your new pen? Yes, you can. / No, you cant. That cant be Mary shes in hospital. Someone is knocking at the door. Who can it be? You cant be careful enough.1. can和和could (could是是can的过去式，语气更委婉的过去式，语气更委婉)(1) 句中句中can表示表示 _。(2) _句中句中can表示可能性，可译为表示可能性，可译为“有可能；有时会有可能；有时会”。(3) 句中句中can表示表示 _。(4) _句中句中c

7、an / could在否定句、疑问句中表示推测或怀疑，在否定句、疑问句中表示推测或怀疑，译为译为“_”。(5) 句中句中cant与与_或或too连用，表示连用，表示“再再也不为过也不为过”。能力能力许可许可 可能可能enough2. may和和might May I watch TV after supper? Yes, you may. / No, you mustnt. They may / might be having a meeting, but Im not sure. If that is the case, you may / might as well try.(1) 句中句

8、中may表示表示_。否定回答时，用。否定回答时，用_。(2) 句中句中may和和might表示表示_，_可能性更小。可能性更小。(3) 句中句中_，意为，意为“不妨不妨”。允许或征询对方许可允许或征询对方许可mustnt可能性可能性mightmay / might as well 动词原形动词原形 I have to wait here because I have no umbrella with me. I must recite the text this morning. Must we hand in our exercise books today? Yes, you must.

9、/ No, you dont have to / you neednt. You mustnt smoke here. Your mother must be waiting for you now. Why must you always interrupt me?(1) 句中句中have to和和句中句中must均表示均表示“_”，但，但_是指说话人的主观看法，是指说话人的主观看法，而而_则强调客观需要。则强调客观需要。(2) 句中句中must 所构成的疑问句，回答的否定形式通常为所构成的疑问句，回答的否定形式通常为_或或_，意为，意为“不必要不必要”，而一般不说，而一般不说_ (句中句中

10、mustnt表示表示“禁禁止止”)。(3) _句中句中must 常表示有根据的、比较确定的推测常表示有根据的、比较确定的推测（只用于肯定的陈述句只用于肯定的陈述句），译为译为“一定一定；必定必定”。(4) 句中句中must表示表示“_”。3. must与与have to必须必须musthave toneedntdont have tomustnt偏要偏要；偏偏偏偏 All visitors should / ought to register with the British Embassy. I find it astonishing that he should be so rude to

11、 you. Mr Lee asked if he should get his visa on time. You should have asked for some help. You shouldnt have told her the news.4. should和和ought to(1) 句中句中should表示表示“_”，其同义词是，其同义词是_；在疑；在疑问句中，通常用问句中，通常用_代替代替ought to。(2) 句中句中should 有时可用于某些从句中，表示说话人惊奇、失望等感情色彩，有时可用于某些从句中，表示说话人惊奇、失望等感情色彩，常译为常译为“ _”。(3) 句中

12、句中should作为作为shall的过去式，用于第一、三人称作主语的疑问句，且多的过去式，用于第一、三人称作主语的疑问句，且多用于间接引语中，以用于间接引语中，以_。(4) 句句should have done 表示表示“ ” shouldnt have done 表示表示“ ”。义务、责任、建议义务、责任、建议ought toshould竟然竟然；怎么会怎么会征求意见征求意见本该做某事（而实际上未做）本该做某事（而实际上未做）本不该做某事（而实际上做了）本不该做某事（而实际上做了） Would you pass me the ball, please? She said that she w

13、ould try her best to help us. Each time his mothers birthday came, he would buy her a present. We will do our best to save the child. Oil will float on the water.(1) 句中句中would表示表示_，比，比will更委婉客气。更委婉客气。(2) 句中句中would和和句中的句中的will表示表示_。(3) 句中句中would和和句中的句中的will表示表示_。Attention: would表示过去的习惯性动作时，暗示现在仍然如此；而

14、表示过去的习惯性动作时，暗示现在仍然如此；而used to表示过去常常做某事，强调现在不是这样了。表示过去常常做某事，强调现在不是这样了。My father used to go to the office by bike when he was young.我父亲年轻的时候总是骑自行车去上班。我父亲年轻的时候总是骑自行车去上班。（现在不是这样了现在不是这样了）5. will和和would请求、建议请求、建议意志、愿望和决心意志、愿望和决心习惯性动作或客观真理习惯性动作或客观真理 He said he would come to see me. He told me he would go t

15、o Beijing. She said she was going to start at once. I was told that they were going to return home. I was going to tell him, but he didnt give me a chance.1. “would + 动词原形动词原形”构成构成_，常表常表示示_。2. “was / were going to + 动词原形动词原形”可表示根据可表示根据 _ 。Attention: 过去将来时表示从过去的某一时间来看将来要发生的过去将来时表示从过去的某一时间来看将来要发生的动作或呈

16、现的状态。过去将来时的出发点是过去，即从过去某一动作或呈现的状态。过去将来时的出发点是过去，即从过去某一时刻看以后要发生的动作或状态。时刻看以后要发生的动作或状态。6. would和和be going to do 过去将来时过去将来时主观意愿的将来主观意愿的将来即将发生的事即将发生的事计划或安排计划或安排 If he dare go, Ill go with him. Tom didnt dare to do it.(1) dare作情态动词时，表示作情态动词时，表示“ _”。常用于否定句和疑问。常用于否定句和疑问句中，后接动词原形，否定形式为句中，后接动词原形，否定形式为_。(2) dare

17、常用作常用作_ ，有，有_的变化，后面可的变化，后面可接接_ 。(3) dare 作为实义动词，有如下搭配：作为实义动词，有如下搭配： dare to do sth 敢于做某事敢于做某事 dare sb to do sth 激某人做某事激某人做某事 7. dare7. dare敢敢； 敢于敢于dare not实义动词实义动词时态、人称和数时态、人称和数带带to的不定式的不定式 You had better get some sleep. You had better not talk with strangers. had better表示表示“_”，使用时常缩写为，使用时常缩写为_，无人称和

18、数的变化，其否定式一般把，无人称和数的变化，其否定式一般把not放在放在had better之之_。8. had better最好最好d better后后Exercise 1. Sometimes smiles around the world _ be false, hiding other feelings like anger, fear or worry.2. You _ have taken so much cash with you, you know that shop accepted checks.3. According to the factory safety rule

19、s, all accidents _ be reported to the safety officer.4. I (tell) him, but he didnt give me a chance.5. They feared that he (criticize) them if they displeased him.Complete the sentences with suitable modal verbs or the correct forms of the verbs. Add not if necessary.canneedntshall was going to tell

20、would criticize 6. You _ be Carol. You havent changed a bit after all these years.7. Life is unpredictable; even the poorest _ become the richest.8. I still remember my happy childhood when my mother _ take me to Disneyland at weekends.9. It was sad to me that they, so poor themselves, _ bring me fo

21、od.10. Harry is feeling uncomfortable. He _ (drink) too much at the party last night.Exercise mustmightwouldshouldmust have drunkExercise:Please translate the following sentences.1. 开车的时候再小心也不过分。开车的时候再小心也不过分。You cannot be too careful while driving a car. = You cant be careful enough while driving a

22、car.2. 我认为他不可能出国了。我刚才还看见他了我认为他不可能出国了。我刚才还看见他了。I think that he couldnt / cant have gone abroad. I saw him just now.3. 如果情况是那样，我们不妨一试如果情况是那样，我们不妨一试。If that is the case, we may as well try.4. 我不敢独自一人去冬泳我不敢独自一人去冬泳。I dare not go winter swimming alone.5. 无人敢提及此事无人敢提及此事。No one dare speak of it.3Apply and p

23、racticeIn the film The Million Pound Bank Note, Henry Adams is stuck in a foreign country without money and friend and with nowhere to stay. While this situation _ seem unusual, it can sometimes happen to travelers. In case it happens to you on a trip abroad, what _ you do? First, and most important

24、ly, you _ stay calm. Fear _ cause you to become confused. You need to think clearly. 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 travelers in need. Fourth, you _ avoid getting in

25、to trouble. You _ think that stealing some money or food would help you, but you should not do so. Getting caught _ ruin your life.Apply and practice: ExerciseFill in the blanks with suitable modal verbs in the box according to your understanding of the passage.may, must, can, ought to, might, had b

26、etter, would, shouldmay / might shouldmay / mighthad betterought to mustshouldwouldmightmightThe saying “Dont judge a book by its cover” means that we _ judge the value of something just based on its external appearance. This is a useful principle to remember when we meet new people. We _ treat ever

27、yone we meet for the first time nicely, no matter how they look. Most of us _ like to be judged on our appearance, because it _ be unfair to us. So we _ remind ourselves to give new people we meet a fair chance. Anybody _ be someone who is worth getting to know. In fact, this person _ end up becomin

28、g your good friend if you _ take a chance and get to know him or her!Apply and practice: ExerciseComplete the passages with suitable modal verbs or the correct forms of the verbs in brackets. Add not if necessary.shouldntmaymay / will notmight / maycanwillcouldmust / had better 4Language pointsLanguage points: Important phrases (P54)1be / get stuck in 2with nowhere to stay3in case4on a trip abroad卡住；陷入卡住；陷入没有地方可呆没有地方可呆以防；万一以防；万一 在一次国外的旅行中在一次国外的旅行中5Homework