Unit 4 Exploring literature Grammar and usage课件-2024-2025学年高中英语译林版(2020)必修第二册

“ 目录 Self-study 01 Presentation 02 Practice 03 Homework 04 CONTENTS Made by Cicy Unit 4 Grammar Modal verbs Self-study 1 can/could → 表能力、 、 。 must → 表 、肯定推测。 may/might → 表 、 推测 。 shall/should → 表建议义务，推测。 will/would → 表 、意愿、 。 读 P99,情态动词，并填空。 请求许可 推测 必须 许可 习惯 请求 Presentation 2 1. 情态动词的语法特征 1. 情态动词 不能单独做谓语。 2. 情态动词没有人称，时态和数的变化，但有些情态动词，如can, may, will, shall也有一般式和过去式的变化。 情态动词+V原 Practice (完成P49, B1) a Can I keep the book for more than two weeks? b Nick can read more in an afternoon than I can in a week! c Can Mary finish War and Peace in a month? a I am afraid I may be unable to finish this novel today. b It may be difficult for people to agree on what good literature is. c You may go to the library tomorrow afternoon, if you have time. √ √ a I must finish writing the book review and hand it in before... b You must be tired after three hours’ reading. c Students must develop the habit of reading classic literature. a Henry should be reading books in the library. b I have fifty dollars—that should be enough for three books. c Reading English novels ... — you should try it too. √ √ 请求许可 能力 能力 推测 推测 请求许可 必须 推测 必须 推测 推测 建议 （4组） can / could, (能够) may / might,(可以) shall / should, (应该) will / would(将要) （4对） have to(不得不), had better(最好), ought to(应该), used to(过去常常) （3个） must, need(必要), dare(敢于) 4 4 3 常见的情态动词： Presentation 2 情态动词的基本用法 （一）can/could 1. 表能够做某事（具备某种能力）；could主要指过去能够； Two eyes can see more than one.   Could the girl read before she went to school?   2. 表建议或请求许可；用于疑问句中表请求（could表示的语气更加委婉）；用于否定句中表不允许。 Can I have a look at your new pen?   You can’t wear jeans at work. Presentation 2 3. 表推测，多用于否定或疑问句中；若用于肯定句中表常有的行为和情形，意为“有时会/可能”； That can’t be Mary—she’s in New York. (“不可能是”) He can be stubborn sometimes. It can be cold here in winter. 4. 表疑惑或惊讶等情绪，意为“究竟能；难道会；到底是”。 What can they be doing? 他们究竟在干些什么？ Where can she have put it? 她到底把它放哪了？ Presentation 2 （二）must 1. must 用于肯定句中表说话人的必须；或坚决要求某人做某事；否定mustn’t 表禁止。 I must go to the bank and get some money. Cars mustn’t park in front of the entrance. 2. 在以must 开头的疑问句中,肯定回答用must; 否定回答用needn’t 或don’t have to。 —Must we hand in our exercise books now? —Yes, you must. / No, you needn’t. / No, you don’t have to.   Presentation 2 3. 表示肯定的推测。意为“想必、一定”等,只用于肯定句。 He must be ill. He looks so pale.   She’s wearing a diamond necklace. She must have a lot of money. 4. 用于短语 if you must (do sth) , 表虽然不赞同但可允许, 意为“如果你一定要… …的话”。 — Can I smoke here? — If you must. Presentation 2 （三）will/ would 1. 表意愿，用于各种人称的陈述句; I will do anything for you. They won’t lend us any more money. 2. 表请求许可、建议，用于疑问句; Will you send this letter for me, please? Would you mind leaving me alone for a few minutes? 3. 表习惯; He would spend hours on the telephone. Presentation 2 （四）may/ might 1. 表请求许可，might指语气更委婉。 You may take whatever you like. May (Might) I ask for a photo of your baby? 2. 表推测。might可能性比may小。 He may be at home, but I’m not sure.   She may/might not know about it.   3.may还可表祝愿。 May you succeed! Presentation 2 （五）should 1. 表建议或义务, 意为“应该”，用于各种人称； You should be polite to your teachers.   You shouldn’t waste any time.   2. 表推测，意为“照说应该、估计”等； The film should be very good as it is starring first-class actors.   They should be home by now.   Presentation 2 (六) ought to 表义务，意为“应该”,语气比should稍重。 You are his father. You ought to take care of him. You oughtn’t to smoke so much.   Presentation 2 (七) 双性动词need, dare 1. 可作实义动词, 由人称、时态和单复数之分，常后接to do。 eg: We need to finish the job before dark. He doesn't dare to answer my question. 2. 可作情态动词, 无人称、单复数之分。 eg: He daren’t speak English in public. You needn’t worry about it. Summary 2 can/could → 表能力、 、 。 must → 表 、推测。 may/might → 表 、 推测 、祝愿。 should → 表 建议义务，推测。 will/would → 表 、意愿、 。 建议/请求许可 推测 必须 请求许可 习惯 请求许可建议 Working out the rules Model verbs can express ability or necessity. They can also make suggestions or describe the probability of an event. The same modal verb can have different functions. Modal verbs can be followed by _____________. You can choose more than one answer for the blank. a do(the base form) d be done(the passive voice) b doing(the verb-ing form) e be doing(the continuous form) c did (the past form) f have done (the perfect form) a, d, e, f Practice (完成P76, C，1-3) 1. can be 2. must/may/might be ; may/might prefer 3. wouldn’t listen 考 点 “ 考点 2 一、情态动词表推测 1. 对现在或客观事实的肯定推测 must：肯定；准是；想必是 should：很可能；应该…, 指按常理推测 may/might：也许；大概；表示把握不大的推测 can/could：用于疑问句表怀疑 —Good morning. I’ve got an appointment with Miss Smith. —Ah, good morning. You ______ be Mrs. Peter. A. might B. must C. would D. can 考点 2 一、情态动词表推测 2.对现在情况或客观事实的否定推测 can’t：不可能；推测的语气相当有把握 couldn’t：不可能；语气较委婉 may(might) not:可能不；也许不，推测表不大有把握 It can’t be the postman at the door. It’s only five o’clock. The younger people might not like the idea. 考点 2 一、情态动词表推测 3. 对过去情况的推测 must have done: 过去一定做过某事 can’t have done/ couldn’t have done: 过去不可能做某事 can/could have done: 过去可能做过某事 may/might(not) have done: 过去可能（没）做过某事 Since nobody gave him any help, he ____ have done the research alone. A. can B. must C. would D. need Why are your eyes so red? You ______ have slept well last night. A. can’t B. mustn’t C. needn’t D. won’t 考点 2 二、情态动词+ have done 的其他用法 should/ought to have done shouldn’t/ ought not to have done could have done might have done needn’t have done 表过去本该做却没有做 表过去本不该做却做了 表本可以做某事却没做 表本可能但实际没有发生的事 表本来不需要做却做了 情态动词+have done的用法归纳 构成 意义 may/might have done “可能已经做了某事” “一定做过某事” “本应该做某事，却没做” “本不应该做某事，却做了” “本不必做某事, 却做了” “过去本来能够做某事，却没做” “过去不可能做某事” must have done should/ought to have done shouldn’t/oughtn’t to have done needn’t have done could have done can’t/couldn’t have done 1. 他意识到一定有什么人进过他的房间。 He was aware that someone ___________________ his room. 2. 谁会想到你会做出这样的事情？ Who _____________________ you did such a thing? 3. 你这么晚的时候本不应该一个人来这里的。 You ____________________________ here alone at such a late hour. must have entered could have supposed shouldn’t/oughtn’t to have come Exercises 4. 她本不必亲自来——写封信来就足够了。 She ________________ in person—a letter would have been enough. 5. 我找不到我的钥匙了。我可能昨天把它们落在学校了。 I can’t find my keys. I __________________ them at school yesterday. needn’t have come may/might have left 答案： 教材P76, C，4-6 4. shall/should talk 5. must have cost 6. must/shall be returned 我们正在做家庭作业，灯突然熄了。我正要说话的时候，你插嘴了。使我大为惊奇的是他还记得我。听到你要走,我们都很吃惊.我认为今天天气会晴朗,他们会来向我们告别. 27 HomeWork “ 04 Homework 复习常见情态动词的用法 01 预习教材P53,Extended Reading. 02 P49， B2 答案 1. can’t 2. must 3. could 4. must 5. can 6. should 7. ought to 书籍是人类 进步的阶梯 “ Thanks $$