九年级下册课件M4-U3

Unit 3Language in useModule 4 Rules and suggestions 1. To summarise and consolidate the use of modal verbs 2. To know more rules of eco-tourismObjectives Are you familiar with these sentences? They are all from this module.1. You must be careful of falling stones.2. You mustnt walk too close to the edge of the hill path because you might fall and hurt yourselves.3. You should always wear proper clothes.4. Bears might think our rubbish is food.5. Can we go rock climbing? No, you cant. 6. You mustnt go off on your own.7. You may need some water.8. We should hang the food in a tree tonight.9. They can smell food from a long way away.10. Bears might think our rubbish is food.11.No one can run faster in the forest than a bear.12. You mustnt make any sudden moves or make a sound. And above all, you mustnt run. 1. You _ be careful of falling stones.2. You _ (not) walk too close to the edge of the hill path because you _ fall and hurt yourselves.3. You _ always wear proper clothes.4. Bears _ think our rubbish is food.5. _ we go rock climbing? No, you _(not).6. You _ (not) go off on your own.mustmustnt mightshouldmightCan cantmustnt go Ready? 7. You _ need some water.8. We _ hang the food in a tree tonight.9. They _ smell food from a long way away.10. Bears _ think our rubbish is food.11.No one _ run faster in the forest than a bear.12. You _ (not) make any sudden moves or make a sound. And above all, you _ (not) run.mayshouldcanmightcan ustnt mustnt 以上我们已经通过归纳总结和练习对本课的语法内容有了一定的了解, 下面就让我们根据之前练习的考察情况进一步选择讲解该语法项的重难点。 情态动词本身有一定的意义，但不能独立作谓语，只能与其后的动词原形一起构成谓语，表示说话人的情绪、态度或语气，用来表达建议、请求、可能或意愿等。情态动词没有人称和数的变化，情态动词后必须跟动词原形。常见的情态动词有：can, could, may, might, must, need, shall, will, should, would。情 态 动 词 Can you lift this heavy box? (体力) Mary can speak three languages. (知识) Can you skate? (技能) 此时可用be able to代替。can只有一般 现在时和一般过去式; 而be able to 则有 更多的时态。表示能力(体力, 知识, 技能), 常用情态 动词can和could表达。 如：Ill not be able to come this afternoon. (一般将来时)He was able to go to the party yesterday evening in spite of the heavy rain. 当表示“经过努力才得以做成功某事”时用be able to, 不能用can。如： Can I go now? Yes, you can. / No, you cant. Could I come to see you tomorrow? Yes, you can. (No, Im afraid not.) 此时可与may互换。在疑问句中还可用could, might代替，但could, might并不表示过去式，只是语气更委婉。它们不能用于肯定句和答语中。如：表示请求和允许。如： Theyve changed the timetable, so we can go by bus instead. This hall can hold 500 people at least. 表示客观可能性(客观原因形成的能力)。如： Can this be true? This cant be done by him. How can this be true? 表示推测 (惊讶、怀疑、不相信的态度) ，用于疑问句、否定句和感叹句中。 Might / May I smoke in this room? No, you mustnt.May / Might I take this book out of the room? Yes, you can. (No, you cant /mustnt. ) 用May I .？征徇对方许可时比较正式和客气，而用Can I .？在口语中更常见。表示请求和允许。might比may语气更委婉，而不是过去式。否定回答时可用cant 或mustnt，表示“不可以，禁止”。如： May you succeed! He may / might be very busy now. Your mother may / might not know the truth. 用于祈使句，表示祝愿。如：表示推测、可能性 (不用于疑问句)。 might不是过去式，它所表示的可能性比may小。如： You must come in time. Must we hand in our exercise books today? Yes, you must. No, you dont have to / you neednt. 在回答引出的问句时, 如果是否定的，不能用mustnt (禁止, 不准)，而用neednt, dont have to (不必)。表示命令、禁止、不得不。如： His play isnt interesting, I really must go now. I had to work when I was your age. Youre Toms good friend, so you must know what he likes best.Your mother must be waiting for you now. must是说话人的主观看法，而have to则强调客观需要。must只有一般现在时，have to 有更多的时态形式。如：表示推测、可能性（只用于肯定的陈述句)。如： You shall fail if you dont work hard. (警告) He shall have the book when I finish it. (允诺) He shall be punished. (威胁) shall 用于第二、三人称，表示说话人给对方的命令、警告、允诺或威胁。 shall 用于第一人称，征求对方的意见。如：What shall we do this evening? Will / Would you pass me the ball, please? I will never do that again. They asked him if he would go abroad.表示意志、愿望和决心。如：表示请求、建议等，would更委婉。如: During the vacation, he would visit me every other day. The wound would not heal. It would be about ten oclock when she left home. would表示过去反复发生的动作或某种倾向。would表示过去习惯时比used to 正式，且没有“现已无此习惯”的含义。如：表示估计和猜想。如： I should help her because she is in trouble. You ought to take care of the baby. You should / ought to go to class right away.Should I open the window? should, ought to表示“应该”，ought to表示义务或责任，比should语气重。表示劝告、建议和命令。should, ought to可通用，但在疑问句中常用should。 表示推测 should/ ought to 客观推测 must 主观推测 He must be home by now. (断定他已到家) He ought to/should be home by now. (不太肯定) This is where the oil must be. (直爽) This is where the oil ought to/should be. (含蓄) 1. 你必须马上回家。 You must go home now.2. 他一定吃过什么东西了。 He must have eaten something.3. 吃饭之前不能吃零食。 You mustnt eat snacks before meals. 4. 我可以问你的名字吗？ May I ask your name?5. 你能用英语说吗？ Can you speak in English?6. 我们应该准时去上学。 We should go to school on time.7. 你没有必要那么做。 You neednt do that. 以下部分为课本练习，供老师在对答案时选择使用。 Match the signs with the rules and warning.P30abc def pic 1 No smoking.2 No eating or drinking.3 Children crossing.4 Danger! Be careful of falling rocks.5 Children should be taken care of by parents.6 Do not drink and drive. Read the list of rules and write sentences using must, mustnt, should or shouldnt.P31Possible answers:You must check in at the main gate when you come to the centre.You should climb with someone/ wear the correct climbing shoes/ wear comfortable clothes.You mustnt climb without a rope.You shouldnt listen to personal music players while climbing. Work in pairs. Explain why the rules in Activity 2 are important.P31 Why must you check in when you come to the centre? Because they want to know who is there.1 Why must you climb with someone?Because you can ask for help if you meet some problems.2 st wear comfortable clothes?Because comfortable clothes can make you less tired.3 nt you climb without a rope?Because it is dangerous for you.4 y shouldnt you listen to music while imbing?ec se y u can hear what is going on around you. People are very (1) _ about the conditions of the ancient forests of Canada and want to save them. Many visitors to the forests use knives to cut their names into the trees, some of which are hundreds of years old. (2) _ there are litter bins, people still throw rubbish into the (3) _ and this causes plants and fish to die. People from local villages have helped clean up the forests. We hope (4) _ will play their part in (5) _ Canadas forests clean too! although keep stream tourist worryworriedAlthough streamtouristskeepingComplete the passage with the correct form of the words in the box.P31 You should _.You shouldnt _.You must _.You mustnt _.Now write possible rules for visitors to the forests.throw rubbish into the litter bins throw rubbish into the stream help save the ancient forests use knives to cut your names into the trees 1. Come and visit me _ you have time.2. The wall is made of _.3. The path to the top is not very _.4. Remember to take a _ with you to sleep in, because it might rain.5. He lifted up the _ and pointed it at the bear.6. There was a _ noise in the woods and we all stopped moving.7. Birds use small _ and leaves to make a home. gun smooth sticks stone sudden tent wheneverwheneverstone smoothtent gunsuddensticksComplete the sentences with the words in the box.P32 Read the passage and answer the questions.P321. What does Zhang Wenpeng try to say with his drawing?2. What does Zhou Zhiyun try to say with his painting?He tries to say that people must wake up to the fact that pollution is causing damage to the progress weve made.He tries to say that people must not waste electricity.3. at does the school sugges the students should do?4. How can a school become a “green school”？The scho l suggests that the tudents should pass on wha they have learnt in school to their parents and neighbours.A school must include education about th envir nment as part of the timet ble to become a “green school”. Listen and complete the sentences.P331. The first thing you have to do is to _ carefully.2. Think about where _ and whether there are _.3. You should only take marked _.4. Make sure you know where _ for lunch.5. Dont forget to tell people to _ for the people.6. dont walk when it is _ or in _.7. You must not try out a _ with a group. 意义情态动词表能力 can/ could表可能性 may/ might/ can/ could表许可、征求对方许可 can/ could/ may/ might表请求对方做事情Will/Would/Could you?Would you mind?表建议、邀请Would you like (to)?Shall we?表意愿 would like/love to表应该、义务 should/ ought/ must表命令、禁止、不得不 must/ mustnt/ have to 表没必要做某事 neednt/ dont have to 单项选择。1. Students in our school _ knowshouting is not allowed in the library. A. can B. may C. must D. need2. You _ drive your car so fast. Its very dangerous. A. wouldnt B. shouldnt C. couldnt D. mightnt 3. _ I see your ID card, sir? We have to check your information. A. May B. Must C. Should D. Need4. Where are you going this month? We _ go to Xiamen, but werenot sure. A. neednt B. must C. might D. mustnt5. Its rather hot in the room. Youd better_ the windows or the door. A. close B. not to close C. dont close D. not close 6. Wheres Tim? Im not sure. He _ in the school library. A. maybe B. must be C. may be D. will be7. You made the same mistakes again. You _ be more careful next time.A. can B. may C. will D. should 8. I have my own room in my house, so I _ do what I want in it. A. can B. have to C. need to D. must9. The man in the office _ be Mr Black because he phoned me from London just now. A. mustnt B. cant C. may not D. neednt 10. According to the air traffic rules, you _ turn off your mobile phone before boarding. A. could B. would C. should D. might 11. Good morning. Ive got an appointment with Dr Lee. Ah, good morning. You _ be Mrs Jones. A. might B. must C. would D. can Homework1. Finish the exercises in Learning English.2. Preview the new words and expressions in Module 5.