广东省深圳市文汇中学七年级英语下册《Unit 6 Electricity Grammar》课件 牛津版.ppt

Unit 6 ElectricityModal VerbsLead-in ClassI can play basketball well. Can you?No, I can’t. ButI can swim fast.Self-learn自学Yes, you may/can.May/Can I sit down?___________I come in?Yes,you may/can.No, you may not /can't.May/Can ____I get you a chair? Yes, thanksMayI can sing beautiful songs. Can you?No, I can’t. ButI can play konfu.Can you?No, I can’t. 情态动词情态动词can, may和和must我们用我们用can表示表示“能力能力”，意思是，意思是“能、能、会会”，其否定式为，其否定式为can’tmay / can表示表示“允许；许可允许；许可”，意思是，意思是“可以可以”，其，其否定式为否定式为may not / can’t。

must表示表示“必必须须”，其否定式，其否定式mustn’t表示表示“禁止禁止”情态动词（modal verbs)：表示说话人的语气或情态，如请求、命令、愿望、能力以及可能性等英语的情态动词有： can/could may/might must ought to shall/should will/would dare/dared need have to 能够可能必须应该应该意愿敢需要不得不+ 动词原形Probe I 探究一A can and cannotWe use can and cannot(can’t) to say we are able or not able to do things.We can use electricity to do many things.We cannot(can't)electricity.Can you think of an example?Yes, I can./ No, I cannot(can't). can/could能，能够，会，可以We can speak Chinese.He can draw pictures.许可You can (=may) go home now.表怀疑，难以置信He couldn’t(can’t) be her father, For he’s too young.注意：could为can的过去式外，could还有表示语气婉转之义。

Could I come in?比Can I come in?更有礼貌但答语还用Yes, you can. No, you can’t.Practice I 应用一1.Hi ______ play football.2.Lo ________ paint pictures.3.Hi _____ speak as many languages as Lo.4.Both Hi and Lo______ dance.5.Lo _____ drive a car, but he _____play chess.6.Hi ____ swim, but he _______ play the guitar.cancan'tcan'tcancan'tcancancan'tProbe II 探究二B may and may notWe use may and may not to ask for and Give permission(许可）. We also use can and cannot (can’t) for the same purpose. May/Can I use you mobile phone?Yes, you may/can. No,you may not/can't. may/ might允许；请求May I have a glass of water?May you borrow me your pen?可能；也许 (may比might语气强）They may be in the library now.He might be at home.表示祝愿May you always be young.Practice II 应用二注意：might为may的过去式外，might还有表示语气婉转之义。

Might I have a look??比May I have a look?更有礼貌但答语还用Yes, you may. No, you may not.I'm going out. __________ I borrow your new bicycle?Yes,you may.Before you go to meet your friends,can you come and see the doctor with me?May/CanYes, I____._____I carry your bag for you? Yes,that's very kind of you, Benny. I 'm ready to go._____you open the door for me? Yes,I canThankscanMayCanWe must save water.We must not waste water.You mustn’t smoke.Must you do homework now?Yes, I must. Must you do your homework?No, I needn’t.Can you play with me?Sorry, I can’t.You may/can play with Jim.【【试一试试一试】】根据题意，选择合适的词语填根据题意，选择合适的词语填空。

空A) can, may, can’t, may not1. Camels ________ live in hot areas.2. You ________ pass the exam if you don’t work hard.3. — ______________ I watch TV now? — No, you ______________.B) must, mustn’t4. You ________ wear a thick coat when it is cold.5. You ________ park your car here. It’s against the rule.cancan’tMay / Canmay not / can’t mustmustn’tProbe III 探究三C must and must notWe use must and must not (mustn’t) to tell people what to do or what not to do. You must not/mustn't do that Benny!We must always be careful with electricity.They must not/mustn't play near the heater.注意：must的提问肯定回答用must,否定用 needn’t---Must I return the book?---Yes, you must.---No, you needn’t. must必须；应该We must work harder.Must not意为不应该；不许；We must not be afraid of difficulties.You mustn’t smoke here.Practice III 应用三1.I must drink more water.2.____________________________________3.________________________________4.I must not________________________5.________________________________6.________________________________The doctor told what to do and what not to doI must go to bed early.I must take the medicine on time.eat cold food.I must not share cups with others.I must not go our alone.情态动词记忆口诀情态动词两要点; 动词原形跟后面,could/might说话语气较委婉,can表能力 may许可,must 责任或义务, 否定回答needn't换;should/ought to应该, will/would 愿,have to 被迫 ,表客观. Sum up 小结 Test for Modal Verbs1.---__I download the article again? ---No, you needn’t. A.Shall B.Will C. Must D. Can2.---Must I stay at home, Mum? ---No, you ___. A.needn’t. B.mustn’t C. don’t D.may notCA3.--May I go out to play basketball, Dad? ---No, you _____. You must finish your homework first. A.mustn’t B may not C. couldn’t D. might notA4.A computer _____ think for itself. It must be told what to do. A.can’t B. couldn’t C. may not D. should5.---Could I borrow your dictionary? ---Yes, you ____.A. might B. must C. can D. shouldAC6.---____ the man there be our new teacher? ---He _____ be, but I’m not sure.A.May, mustn’t B.Can; mayC.Must; can’t D. Can; can’t 7.You _____ be more careful next time.A.may B. must C. could D. might 8.Students ________ smoke.A.can’t B. mustn’t C. might not BBB。