Unit 5 The Value of Money Discovering Useful Structures 课件-2024-2025学年高中英语人教版（2019）必修第三册

该高中英语课件聚焦情态动词功能及过去将来时用法，通过重读对话识别情态动词，结合思维导图梳理类别（如necessity、possibility），引导学生从具体例句到抽象功能分类，再对比辨析can/could等近义情态动词，构建从感知到应用的学习支架。 其亮点在于情境化语篇练习（如《百万英镑》片段填空）与对比分析（如must与have to的主客观差异），结合思维导图可视化知识体系，提升学生语言能力（语用实践）和思维品质（逻辑辨析）。分层练习助学生巩固，系统资源为教师提供清晰教学路径，促进高效课堂。

Unit 5 The Value of Money Discovering useful structures: Express modality and talk about future events in the past 1. To learn about the different functions of modal verbs. 2. To be able to talk about future events in the past using “would do” and “was / were going to do”. Lead-in Reread the passage and pay attention to the usage of the bold words. They are called modal verbs. They are used to express ability, obligation, possibility, intension, request, advice, etc. Lead-in How many modal verbs do you know? And what are they? may / might must / have to shall / should will / would ought to need / dare can / could Mind map of the modal verbs modal verbs Lead-in The function of modal verbs Modal verbs have many functions as follow: A. necessity B. possibility C. obligation D. request E. advice F. intention 需要 可能 职责/义务 要求 建议 意图 Can you give examples of each function? Find modal verbs in previous sections and discuss their functions. Lead-in The function of modal verbs A. necessity 表示必要性 You have to read between the lines because the real messages are often hidden… B. possibility 表示可能和推测 It may seem lucky to you. C. obligation 表义务性 Astronauts must wear spacesuits when they work in space because… Lead-in The function of modal verbs D. request 表示提出请求或发出指示 May we ask what you’re doing in this country? E advice 表示提出建议 You’d better not open it. F. intention 表示意图和愿望 What would you do if you were in her situation? Presentation The function of modal verbs We use modal verbs to talk about A. ability or will（能力或意愿） B. prohibition（禁止） C. making suggestions（建议） D. certainty or inference（可能性或推断） E. politeness or euphemism（客气或委婉） F. obligations or expectations（义务或预期） Presentation The exercises of modal verbs 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 you’re doing in this country and what your plans are? (　 ) 4. Well, I can’t say that I have any plans.(　 　 ) 5. Well, you mustn’t worry about that. (　 ) 6. You mustn’t think we don’t care about you. ( ) 7. Well, it may seem lucky to you but not to me! (　　 ) 8. Now if you’ll excuse me, I ought to be on my way. (　　 ) 9. Oh, no, you’d better not open it. ( ) 能力或意愿 客气或委婉 客气或委婉 能力或意愿 禁止 禁止 可能性或推断 义务或预期 建议 Grammar The modal verbs 情态动词 1. 情态动词有一定的意义，表示或暗示某种情绪或态度，表示可能、建议、愿望、必要、允许、能力等。 大多数情态动词有多个意义。 2. 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，一起构成谓语动词。 Grammar The modal verbs 情态动词 只用作情态动词的: can/could, may/might, ought to, must 可用作情态动词也可用作实义动词的: need, dare 可用作情态动词也可用作助动词的: shall/should, will/would 相当于情态动词的: have to, used to Grammar The comparison and conclusion of modal verbs: can & could ① He can use the computer skillfully now, but he couldn’t last year. ② Training by oneself in a gym can be highly dangerous. ③ — Can / Could I have a look at your new pen? — Yes, you can. / No, you can’t. ④ That can’t be Mary — she’s in hospital. ⑤ Someone is knocking at the door. Who can it be? ⑥ You can’t be careful enough. Grammar The comparison and conclusion of modal verbs: can & could (1) ①句中can表示 ____________。 (2) _______句中can表示可能性，可译为“有可能；有时会”。 (3) ③句中can表示 ____________。 (4) ____________句中can / could在否定句、疑问句中表示推测或怀疑，译为“____________”。 (5) ⑥句中can’t与____________或too连用，表示“再……也不为过”。 能力 ② 许可 ④ ⑤ 可能 enough Grammar The comparison and conclusion of modal verbs: may & might ① — May I watch TV after supper? — Yes, you may. / No, you mustn’t. ② They may / might be having a meeting, but I’m not sure. ③ If that is the case, you may / might as well try. (1) ①句中may表示______________________。否定回答时，用________。 (2) ②句中may和might表示_________，______可能性更小。 (3) ③句中______________________________，意为“不妨”。 允许或征询对方许可 mustn’t 可能性 might may / might as well ＋ 动词原形 Grammar The comparison and conclusion of modal verbs: must & have to ① I have to wait here because I have no umbrella with me. ② I must recite the text this morning. ③ — Must we hand in our exercise books today? — Yes, you must. / No, you don’t have to / you needn’t. ④ You mustn’t smoke here. ⑤ Your mother must be waiting for you now. ⑥ Why must you always interrupt me? Grammar The comparison and conclusion of modal verbs: must & have to ①句中have to和②句中must均表示“_______”，但_______是指说话人的主观看法，而 ___________则强调客观需要。 (2) ③句中must所构成的疑问句，回答的否定形式通常为_______________或_________，意为“不必要”，而一般不说____________ (④句中mustn’t表示“禁止”)。 (3) ______句中must 常表示有根据的、比较确定的推测（只用于肯定的陈述句），译为 “一定；必定”。 (4) ⑥句中must表示“________________”。 必须 must have to needn’t don’t have to mustn’t ⑤ 偏要；偏偏 Grammar The comparison and conclusion of modal verbs: shall & should & ought to ① All visitors should / ought to register with the British Embassy. ② He shall have the book when I finish reading. ③ Shall we begin our lesson? ④ Mr Lee asked if he should get his visa on time. ⑤ You should have asked for some help. ⑥ You shouldn’t have told her the news. Grammar The comparison and conclusion of modal verbs: shall & should & ought to (1) ①句中should表示“___________________”，其同义词是____________；在疑问句中，通常用_________代替ought to。 (2) ②句中shall在第二、三人称陈述句中表示_________ ________________________。 (3) ③ ④句中shall以及should（shall的过去式），用于第一、三人称作主语的疑问句，用以表示：____________。 (4) ⑤ ⑥句should have done 表示“_____________________________” shouldn’t have done 表示“________________________________”。 义务、责任、建议 ought to should 命令，警告，强制，承诺 征求意见 本该做某事（而实际上未做） 本不该做某事（而实际上做了） 威胁， Grammar The comparison and conclusion of modal verbs: will & would ①Would you pass me the ball, please? ②She said that she would try her best to help us. ③Each time his mother’s birthday came, he would buy her a present. ④We will do our best to save the child. ⑤Oil will float on the water. (1) ①句中would表示_____________，比will更委婉客气。 (2) ②句中would和④句中的will表示___________________。 (3) ③句中would和⑤句中的will表示___________________。 请求、建议 意志、愿望和决心 习惯性动作或客观真理 Attention: would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。 My father used to go to work by bike when he was young. 我父亲年轻的时候总是骑自行车去上班。（现在不是这样了） Grammar The comparison and conclusion of modal verbs: dare ① If he dare go, I’ll go with him. ② Tom didn’t dare to do it. (1) dare作情态动词时，表示“ __________”。常用于否定句和疑问句中，后接动词原形，否定形式为_________。 (2) dare作实意动词时，有________________的变化，后面可接________________ 。 (3) dare 作为实义动词，有如下搭配： dare to do sth 敢于做某事 dare sb to do sth 激某人做某事 敢； 敢于 dare not 时态、人称和数 带to的不定式 Grammar The comparison and conclusion of modal verbs: had better ① You had better get some sleep. ② You had better not talk with strangers. had better表示“____________”，使用时常缩写为____________，无人称和数的变化，其否定式一般把not放在had better之______。 最好…… ’d better 后 Exercise Read the passage and fill in the blanks with suitable modal verbs in the box. may must can ought to might had better would should In the film The Million Pound Band 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. In case it happens to you on a trip abroad, what ________ you do? First, and most importantly, you _______ stay calm. may should must Exercise Read the passage and fill in the blanks with suitable modal verbs in the box. 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 travellers in need. Fourth, you __________ avoid getting into trouble. You ______ think that stealing some money or food would help you, but you should not do so. Getting caught ________ ruin your life. can ought to had better might would might would Presentation The past future tense 过去将来时表示在过去某一时间将要发生的动作或存在的状态。过去将来时常用在主句谓语动词为过去时态的宾语从句中。过去将来时句子中有时包含时间状语 the next day, soon等。 过去将来时 Presentation The past future tense 过去将来时的基本结构是“would+动词原形”, 否定式是在would后面加not。如: Jeff knew he would be tired the next day. 杰夫知道他第二天会很累。 He promised that he would not open the letter until 2 o’clock. 他许诺两点钟之前不会打开信。 Presentation The past future tense 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 in their bet when they saw Henry walking on the street outside. 他们正准备找一个人来参与他们的赌局, 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. 汤姆森夫人刚要坐下看剧的时候, 她的电话响了。 Presentation The difference between “will” and “be going to” 1. be going to表示事先经过考虑或事先做好安排，而will则表示没有经过事先考虑，只是在说话时做出的决定。如： What are you going to do when you grow up? There’s someone at the door. I’ll go and open it. 2. will可用来表示事物的倾向性或规律性，而be going to则没有这种用法。如： People won’t live without water. Presentation The difference between “will” and “be going to” 3. 表示将来意义的will不可用在条件状语从句中，但可以用在带条件状语从句的主句中。will表示“意愿”时可以用在条件句中。如： If you are going to join us, we will wait for you. If you will give me a hand, I’ll tell you what happened. (第一个will在此表意愿) 4. 强调从目前的证据或迹象推测可能发生某事时，常用be going to。如： What bad weather! It is going to rain.  Exercise Finish the exercise 3 on Page 54 1. Philip bought two tickets for The Phantom of the Opera. He ______________________________ (watch) this musical with his girlfriend on the weekend. 2. I was so surprised at the news that David ___________________________ (play) the role of the dinosaur in the play that I gave him a hug out of joy. would watch / was going to watch would play / was going to play Exercise Finish the exercise 3 on Page 54 3. Lily decided that she ___________________________ (settle) in New York and pursue her dream of becoming an actress. 4. Hey, Timmy. I _______________ (call) you. But now that you are here, I don't have to. 5. The competition was so close that no one was sure who ___________ (win) the Best Actor award. 6. Jim is not here right now. He said he _____________ ___________ (be) on duty at the library this afternoon. would settle / was going to settle was going to call would win would be / was going to be Exercise Finish the following exercises 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 rules, all accidents ______ be reported to the safety officer. 4. I __________________ (tell) him, but he didn’t give me a chance. 5. They feared that he _______________ (criticize) them if they displeased him. can needn’t shall  was going to tell would criticize Exercise Finish the following exercises 6. You ________ be Carol. You haven’t 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 food. 10. Harry is feeling uncomfortable. He ___________________ (drink) too much at the party last night. must might would should must have drunk $$