初中英语九年级下册module 5 《unit 3 language in use》课件

外研新标准初三下Unit 3 Language in useModule 51. To summarise and consolidate the use of modal verbs 2. To know more rules of ecotourismObjectives：语法讲解建议采用归纳法，如尽可能多的呈现一些相关例句，或可让学生从已学课文中找相应例句，引导学生试着从所观察到的语言现象中总结出语法规律。1. You must keep to the path.2. We should start walking.3. You have to think about personal safety!4. We can take a look across the countryside.5. I may need a rest very soon.6. You cant leave anything which bears might think is food.Are you familiar with these sentences? They are all from Module 5.7. I may need a rest very soon.8. We should hang the food in a tree tonight.9. Bears can climb trees.10. They can smell food from a distance.11. We should make lots of noise.12. You mustnt move or make any gesture.13. No one can run faster in the forest than a bear.14. I still couldnt see what was happening.Have you noticed the modal verbs underlined?1. to test your sense of observation2. to test your ability of shortterm memory 3. to test your ability of inductive methodGuess1. You _ keep to the path.2. We _ start walking.3. You _ _ think about personal safety!4. We _ take a look across the countryside.5. I _ need a rest very soon.6. You _ leave anything which bears _ think is food.7. I _ need a rest very soon.mustshouldhave tocanmaycantmightmay 8. We _ hang the food in a tree tonight.9. Bears _ climb trees.10. They _ smell food from a distance.11. We _ make lots of noise.12. You _ move or make any gesture.13. No one _ run faster in the forest than a bear.14. I still _ see what was happening.should can can should can couldntmustnt Read the list of rules and write sentences.Castle Peak Indoor Climbing Centre To all climbers!Do: Sign in when you come to the centre.Climb with a partner.Wear a hard hat at all times.Wear the correct climbing shoes.Dont:Dont eat or drink anywhere except in the caf.Dont listen to personal music players while climbing.Dont light fires.Good practice:Use a locker to store your clothes.Wear loose, comfortable clothing.Wearing jewellery can cause accidents.Talking on a mobile phone while climbing can be dangerous.Read the list of rules and write sentences.You must sign in when you come to the centre.You must _.You mustnt _.You should _ _.You shouldnt _.climb with a partnerlight firesuse a locker to store your clothestake on a mobile phone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。1. can, could 表示 能力 (体力 , 知识 , 技能 ), 常用情态 动词 can和 could表达。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。 如： Ill not be able to come this afternoon. (一般将来时 )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： He was able to go to the party yesterday evening in spite of the heavy rain. 表示 请求和允许 。如： Can I go now? Yes, you can. / No, you cant. 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： Could I come to see you tomorrow? Yes, you can. (No, Im afraid not.) 表示 客观可能性 (客观原因形成的能力 )。 如： Theyve changed the timetable, so we can go by bus instead. This hall can hold 500 people at least. 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。 Can this be true? This cant be done by him. How can this be true? 2. may, might 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： 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。 用于 祈使句 ，表示 祝愿 。如：May you succeed! 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：He may / might be very busy now. Your mother may / might not know the truth. 3. must, have to 表示 命令、禁止、不得不 。如： You must come in time. 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 )。 Must we hand in our exercise books today? Yes, you must. No, you dont have to / you neednt. 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： His play isnt interesting, I really must go now. I had to work when I was your age. 表示 推测、可能性 （只用于 肯定的 陈述句 )。如： Youre Toms good friend, so you must know what he likes best. Your mother must be waiting for you now. 4. shall, should shall 用于 第一人称 ， 征求对方的意见 。 如： What shall we do this evening? 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 。 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 ) 5. will, would 表示 请求、建议 等， would更委婉 。如 : Will / Would you pass me the ball, please? 表示 意志、愿望和决心 。如 : I will never do that again.They asked him if he would go abroad. 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： During the vacation, he would visit me every other day. The wound would not heal. 表示 估计 和 猜想 。例如： It would be about ten oclock when she left home. should, ought to表示 “应该 ”， ought to 表示义务或责任， 比 should语气重 。 I should help her because she is in trouble. You ought to take care of the baby. 6. should, ought to 表示 劝告、建议和命令 。 should, oughtto可通用 ，但在疑问句中常用 should。 You should / ought to go to class rightaway. Should I open the window? 表示 推测 should/ ought to 客观推测 must 主观推测He must be home by now.