Unit5 Grammar 课件2024-2025学年牛津译林版英语八年级上册

Unit 5 Wild animals Grammar Revision Pandas may not have a place to live or food to eat. If we do nothing, soon there may be none left. Using may to talk about possibility 用may来谈论可能性 方法 1.may表示推测可能性，意为“可能，或许”，可用于肯定句和否定句中。 It may rain tomorrow. She may be at home. 肯定句： may ＋动词原形 It may not rain tomorrow. She may not be at home. 否定句： may not＋动词原形 may not do... “可能不......” ---Where is John? ---He may be sleeping at home now. may be doing“也许正在做...”, 用于现在进行时的句子中。 In the zoo 1. The elephant is going towards the water. It __________ (need) a bath. may need 2. The little boy is crying because he saw the tigers. He ________ (be) afraid of them. 3. I cannot go near the lions and tigers. They __________ (hurt) me. 4. The baby panda is not drinking its mum’s milk. It _____________ (not be) hungry. may be may hurt may not be 5. The monkeys are jumping around. They _______________ (be playing) with each other. 6. The horse is standing with its eyes closed. It ______________ (be sleeping). may be playing may be sleeping /kləʊzd/ adj.关闭的 open v.打开 close v.关闭 open adj.打开的；开放的，营业的. be open close adj.亲密的 close friends closed adj.关闭的 ...be closed ---Have you heard that some bad things would happen in 2050? ---Don’t worry! The news ______ be true. A.mustn’t B.may not C.needn’t D.may ---一些糟糕的事情会在2050年发生，你听说了吗？ ---不要担心！这个消息可能不是真的。 may not表示“可能不”； A.mustn’t表示“禁止，不允许”，翻译不通顺。 C.needn’t=need not.这是need作情态动词的否定形式，“不必”，翻译不通顺。 D.may“可能”，和“不用担心”矛盾。 The Browns ______ in the cinema. I saw them in the supermarket ten minutes ago. A.may be not B.needn’t be C.mustn’t be D.can’t be 布朗一家人不可能在电影院。我十分钟前在超市看见他们了。 can作情态动词，也可以表示推测，“可能”，常用于否定句和疑问句中，此时，can’t(can not)表示“不可能”。 A.顺序错误，应改为may not be; B.表示“不必”，翻译不通顺。C.mustn’t表示“禁止，不允许”，翻译不通顺 推测可能性大小：must>can>may>might（大家动笔把这个记下来） 2.may表示请求、许可，“可以”。此时，may比can正式。 ①You may go home now. ②May I use your computer? 以May引导的一般疑问句，May后多用第一人称(I/We)和问答方式： ---May I smoke here? ---Yes, please./Yes, you may./Yes, you can.(肯定回答) （否定回答) ---No, you can’t. (一般性问题) ---No, you mustn’t. (涉及法律和正式规定) 根据语境，判定用哪个否定回答。 3、may表示希望、祈求、祝愿。 结构为：May＋主语＋谓语＋其他。 e.g. May you have a good time.祝你过得愉快。 May you succeed!祝你成功！ May you be happy!祝你开心！ 1、当主语是第一人称时，may引导的一般疑问句的否定回答用can’t和mustn’t,表示“不可以”和“禁止”。 2、“May I...?”较正式，语气上更委婉。口语中可以用 “Can I...?”表示请求许可。“Could I...?”也可表示请求许可，语气比“Can I...?”更委婉。但是，用“Could I...”提问时，回答要用can. e.g. ---Could I use your pen? ---Yes, you can./No, you can’t. 3、may一般不用于反意疑问句。 may表示“可能”时，相当于副词perhaps, maybe 1. He may be at home now. =Perhaps he is at home now. =Maybe he is at home now. 2. She may not be happy now. =Perhaps she is not happy now. =Maybe she is not happy now. 注意： 副词perhaps, maybe无法做谓语，但是may(not)＋ 动原 做谓语。 1.Don't drive too fast, or you _____ (可能)have an accident. 2.You had better ask the policeman. He ______ (可能)know the place. 3. He may be a student.（同义句转换） = _______ he is a student. 4.---May I park my car here? ----No, you ______. (can't/ mustn't).You should park it in the car park. 5.---Did you hear Julia singing in the room last night? ----No, it ______be Julia. She has gone to(已经去了) Paris. A.may not B. can't C. needn't D. couldn't 中考链接 may may Maybe mustn't B Bats can’t see, but they can decide to fly the right way with the help of their mouth and ears. bat /bæt/ verbs + to-infinitives (to do不定式) decide to do sth.决定做某事 当句子中已经有谓语动词, 而我们又要表达不止一个动作概念时, 其余的动词可以使用非谓语形式表达。动词不定式就是动词的一种非谓语形式, 其基本形式是“to+动词原形”。如：（不用抄，了解即可） He wants to play football after class. 他想课后踢足球。 My mother forgot to turn off the lights yesterday. 我妈妈昨天忘记关灯了。 注意:（记笔记） 动词不定式在句子中不作谓语, 因此没有人称、单复数和时态的变化。 We often use to-infinitives after these verbs. agree choose decide hope learn plan prepare want like start begin fail wish try remember forget You must promise not to be late again. 你必须保证不再迟到了。 He decided not to go home. 他决定不回家了。 注意：（记笔记） 动词不定式的否定形式是“not to + 动词原形”。 I don’t know where to find my keys. Can you tell me how to work out this Maths problem? 疑问词＋to do，是名词短语，可以放在句中，做动词的宾语。 remember to do sth. 记得去做某事 remember doing sth. 记得做过某事 区分 forget to do sth. 忘记去做某事 forget doing sth. 忘记做过某事 e.g. Tom, 记得课后和我们一起打篮球。 Tom, remember to play basketball with us after class. 我记得上个月写了一封信给你。 I remembered writing a letter to you last month. stop to do sth. 停下(正在做的)事去做(另一件)事 stop doing sth. 停止做(正在做的)事 e.g. 让我们停下来休息一下。 Let’s stop to have a rest. 不要说话。老师来了。 Stop talking. The teacher is coming. 区分 1. enjoy enjoy doing sth. Kitty enjoys dancing. let let sb. do sth. The teacher lets him read loudly. 3. practise practise doing sth. You should practise speaking often. We don’t use ‘to’ after these verbs. 4. make make sb. do sth. The joke makes me laugh and laugh. 5. help help sb. do/to do sth. She often helps me (to) carry water. 6. finish finish doing sth. You must finish doing your homework on time. Dad: Do you know anything special about wild animals? Amy: Yes, Dad. For example, dolphins are clever. They can _________________ (learn, work out) easy Maths problems. Dad: What do you know about bats? Amy: Bats can’t see, but they never ____________(fail, fly) the right way with the help of their mouth and ears. Dad: Did you know that bees never get lost? Amy: Yes. Bees always_________________________ (remember, come back) the same way as they go. Dad: What do you know about squirrels? Amy: They always ______________ (begin, save) some food before winter comes. Dad: Yes, but sometimes they forget where to find the food. learn to work out fail to fly remember to come back begin to save Exercises 1. You must _____ (listen) to the teacher carefully in class. 2. Mary agreed _____ (go) shopping with Lucy. 3. Look! The boys ____________(play) football. listen to go are playing Exercises 4. May decided ______ (buy) a book for Ann’s birthday. 5. Max tells funny jokes to make us ____(feel) happy. 6. Let’s ____ (go) on a trip tomorrow. go to buy feel 7. The policeman told the boys __________ (not play) football in the street. 8. Would you like something ________ (drink)? 9. _________ (not be) late for class again. 10. I plan ________(travel) around the world in the summer. not to play to drink Don’t be to travel 11. Daniel hopes ______(be) a doctor when he ________ (grow) up. 12. I prepare _________ (clean) my room this afternoon. 13. Do you want _______ (see) a film with me? to be grows to clean to see Finish the exercise on your workbook. Learn more about wild animals. Homework Thanks for watching $$