广东省深圳市文汇中学七年级英语下册 Unit 6 Electricity Period 3 grammar课件 .ppt

Unit 6 Electricity,Modal Verbs,I can play basketball well.Can you?,No,I cant.ButI can swim fast.,I can sing beautiful songs.Can you?,No,I cant.ButI can play konfu.Can you?,No,I cant.,A can and cannot,We use can and cannot(cant)to say we are able or not able to do things.,We can use electricity to do many things.We cannot(cant)electricity.Can you think of an example?Yes,I can./No,I cannot(cant).,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.,can,cant,cant,can,cant,can,can,cant,Yes,you may/can.,May/Can I sit down?,_I come in?,Yes,you may/can.,No,you may not/cant.,May/Can,B may and may not,We use may and may not to ask for and Give permission(许可）.We also use can and cannot(cant)for the same purpose.,May/Can I use you mobile phone?Yes,you may/can.No,you may not/cant.,How are you feeling,Daisy?,Not very well.,_I get you a chair?,Yes,thanks,May,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?,May/Can,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 can,Thanks,can,May,Can,We must save water.We must not waste water.,You mustnt smoke.,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.,C must and must not,We use must and must not(mustnt)to tell people what to do or what not to do.,You must not/mustnt do that Benny!We must always be careful with electricity.They must not/mustnt play near the heater.,drink more water go to bed earlyeat cold food share cups with othersgo out alone take the medicine on time,1.I must drink more water.2._3._4.I must not_5._6._,The doctor told what to do and what not to do,I 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（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,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 couldnt(cant)be her father,For hes 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 cant.,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.,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.,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 mustnt smoke here.,注意：must的提问肯定回答用must,否定用 neednt-Must I return the book?-Yes,you must.-No,you neednt.,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neednt换;should/ought to应该,will/would 愿,have to 被迫,表客观.,Test for Modal Verbs,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,C,A,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,A,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,A,C,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.may B.must C.could D.might 8.Students _ smoke.cant B.mustnt C.might not,B,B,B,9.Is that Kates car?-It _be hers.She has just gone for a meeting.【2014湖北武汉】A.cant B.should C.mustnt D.may10.-Lisa,hurry up!The bus is coming.-Oh,no.We_cross the street until the traffic lights turn green.【2014福建】A.mustnt B.neednt C.should,A,A,中考链接,The end,