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I play basketball well. you?No, I . ButI swim fast.第1页/共31页第一页，共32页。I sing beautiful songs. you?No, I . ButI play konfu. you?No, I . 第2页/共31页第二页，共32页。A can and cannotWe use and to say we are able or not able to do things.We use electricity to do many things.We electricity. you think of an example?Yes, I ./ No, I .第3页/共31页第三页，共32页。第4页/共31页第四页，共32页。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.第5页/共31页第五页，共32页。Yes, you . I sit down?第6页/共31页第六页，共32页。_I come in?Yes,you No, you /第7页/共31页第七页，共32页。B may and may notWe use may and may not to ask for and Give permission(许可(xk)）. We also use can and cannot (cant) for the same purpose. I use you mobile phone?Yes, you . No,you 第8页/共31页第八页，共32页。 How are you feeling,Daisy ?Not very well.第9页/共31页第九页，共32页。 _I get you a chair? Yes, thanksMay第10页/共31页第十页，共32页。Im 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?第11页/共31页第十一页，共32页。Yes, I_._I carry your bag for you? Yes,thats very kind of you, Benny. I m ready to go._you open the door for me? Yes,I canThanks第12页/共31页第十二页，共32页。We save water.We not waste water.You smoke.第13页/共31页第十三页，共32页。Must you do homework now?Yes, I must. Must you do your homework?No, I neednt.Can you play with me?Sorry, I cant.You may/can play with Jim.第14页/共31页第十四页，共32页。C must and must notWe use and to tell people what to do or what not to do. You do that Benny!We always be careful with electricity.They play near the heater.第15页/共31页第十五页，共32页。drink more water go to bed earlyeat cold food share cups with othersgo out alone take the medicine on time1.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.第16页/共31页第十六页，共32页。情态动词（modal verbs)：表示说话(shu hu)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：第17页/共31页第十七页，共32页。 can/could may/might must ought to shall/should will/would dare/dared need have to 能够(nnggu)可能必须应该应该意愿敢需要不得不+ 动词(dngc)原形第18页/共31页第十八页，共32页。 can/could能，能够(nnggu)，会，可以We can speak Chinese.He can draw pictures.许可(xk)You can (=may) go home now.表怀疑(huiy)，难以置信He couldnt(cant) be her father, For hes too young.第19页/共31页第十九页，共32页。注意：could为can的过去式外，could还有表示(biosh)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 cant.第20页/共31页第二十页，共32页。 may/ might允许(ynx)；请求May I have a glass of water?May you borrow me your pen?可能；也许(yx) (may比might语气强）They may be in the library now.He might be at home.表示(biosh)祝愿May you always be young.第21页/共31页第二十一页，共32页。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(lmo)。但答语还用Yes, you may. No, you may not.第22页/共31页第二十二页，共32页。 must必须(bx)；应该We must work harder.Must not意为不应该(ynggi)；不许；We must not be afraid of difficulties.You mustnt smoke here.第23页/共31页第二十三页，共32页。注意：must的提问肯定回答(hud)用must,否定用 neednt-Must I return the book?-Yes, you must.-No, you neednt.第24页/共31页第二十四页，共32页。情态动词记忆(jy)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(hud)neednt换;should/ought to应该, will/would 愿,have to 被迫 ,表客观. 第25页/共31页第二十五页，共32页。第26页/共31页第二十六页，共32页。1.-_I download the article again? -No, you neednt. A.Shall B.Will C. Must D. Can2.-Must I stay at home, Mum? -No, you _. A.neednt. B.mustnt C. dont D.may not第27页/共31页第二十七页，共32页。3.-May I go out to play basketball, Dad? -No, you _. You must finish your homework first. A.mustnt B may not C. couldnt D. might not第28页/共31页第二十八页，共32页。4.A computer _ think for itself. It must be told what to do. A.cant B. couldnt C. may not D. should5.-Could I borrow your dictionary? -Yes, you _.A. might B. must C. can D. should第29页/共31页第二十九页，共32页。6.-_ the man there be our new teacher? -He _ be, but Im not sure.A.May, mustnt B.Can; mayC.Must; cant D. Can; cant 7.You _ be more careful next time.A.may B. must C. could D. might 8.Students _ smoke.A.cant B. mustnt C. might not BBB第30页/共31页第三十页，共32页。谢谢您的观看(gunkn)！第31页/共31页第三十一页，共32页。NoImage内容(nirng)总结I can play basketball。Yes, I can./ No, I cannot(cant).。注意：could为can的过去式外，could还有表示(biosh)语气婉转之义。但答语还用Yes, you can. No, you cant.。注意：might为may的过去式外，might还有。但答语还用Yes, you may. No, you may not.。谢谢您的观看第三十二页，共32页。
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