初中祈使句PPT课件

祈使句,祈使句的定义,祈使句表示请求、命令、建议等等。谓语动词一律用原形。句子中通常不用主语，句末用惊叹号或者句号。,Turnleft!,Turnright!,Walkonthezebracrossing!,Dontsmoke!Nosmoking!,Dontparkyourcar!,Donteat!,Dontpicktheflowers!,Goupstairs!,Readandobservethedifference,Turnleft!,Turnright!,Pleasegoupstairs!,Godownstairs!,Walkonthezebracrossing!,Dontsmoke!,Dontplayfootball!,Dontparkyourcar!,Pleasedonteat!,Dontpicktheflowers!,Drawtheconclusion(得出结论),祈使句的结构如下：(Please)+dosth.(Please)+Dontdosth.,肯定：,否定：,祈使句的句型,Bequiet.Pleasehaveaseat.David,payattention.,Dontbeafraid.Pleasedonotmakeanoise.Alan,dontbelate.,1.动词+2.Please+动词3.人名+动词,肯定,否定,在动词前面加dont否定,祈使句句式详解,1.肯定的祈使句（1）动词原形+其他Standup,please.=Pleasestandup.请起立。（2）Be+adj.Becareful!=Lookout!=Takecare!小心/当心！（3）Lets+动词原形Letsgotoschooltogether.咱们一起上学去吧。,祈使句句式详解,2.否定的祈使句（1）Dont+动词原形Dontstandup.别站起来。Dontbecareless.别粗心。Dontletthemplaywithfire.别让他们玩火。（2）Lets(letsb)+not+动词原形Letsnotsayanythingaboutit.对于这件事，咱们什么也别说。Letthemnotplaywithfire.别让他们玩火。,祈使句句式详解,3.祈使句谓语用何动词形式英语祈使句的谓语总是用动词原形。如：Bequiet!别说话!Comeearliernexttime.下次早点来。Haveagoodtime.愿你玩得痛快。Goandtellher.去告诉她吧。注：有时为了加强语气，可在动词前加do。如：Dobecareful.务请小心。Docomeontime.务必请准时来。,祈使句句式详解,4.关于以let开头的祈使句Letseatouttonight.我们今晚出去吃饭吧。Letmehaveatry.我来试一试。Letmeshowyouhowtodoit.我来告诉你怎样做。Leteverymandohisbest.让每个人人尽其才。Letthemeatcookslowly.把肉用慢火炖。,1.这类祈使句的否定式有两种形式。如：Letsnothurry./Dontletshurry.我们不要太急。2.let后用作宾语补足语的动词要用原形，不能用带to的不定式。,祈使句句式详解,5.与please连用以使语气委婉为使语气委婉，通常将祈使句与please连用。Please可用于祈使句的句首(其后通常不用逗号)或句末(其前通常用逗号)。如：Pleasedontgetangry.请不要生气。Pleasedrivemoreslowly.请开得慢一点。Pleasecutmeapieceofcake.请给我切一块蛋糕。Pleasetrytobequiet.请设法保持安静。Pleaserepeatwhatyouvejustsaid.请把你刚才说的话重复一遍。,祈使句与反意疑问句,一、基本原则若陈述部分为祈使句，反意问句通常用willyou,wontyou,wouldyou等。如：Mailthelettertoday,willyou?今天就把信发掉，好吗?Trytobebackbytwo,wontyou?设法两点之前回来，好吗?注：若陈述部分为否定式，则反意问句部分只用willyou。如：Dontforgettoposttheletter,willyou?请别忘了寄信。有时根据语境的需要，反意问句也可以用canyou,cantyou等：Givemesomecigarettes,canyou?给我些香烟，可以吗?Walkfaster,cantyou?走快点，不行吗?,祈使句与反意疑问句,二、let型1.当祈使句为Lets时：反意问句总是用shallwe。如：Letsphonehernow,shallwe?我们现在就给她打电话，好吗?Letsgotothecinematonight,shallwe?今晚咱们去看电影，好吗?2.当祈使句为Letus时：若表示请求，反意问句用willyou;若表示表示建议，则用shallwe。如：Letusknowyouraddress,willyou?请把你的地址告诉我们，好吗?Letusgoswimmingtogether,shallwe?我们一起去游泳好吗?注：lets只表示建议，所以其后反意问句总是用shallwe。而letus既可表示建议请求，也可表示建议(较正式)，其后的反意问句要根据这两种不同情况分别使用willyou和shallwe。,Letsdomoreexercises.,1.Callmewhenyougethome.OK,_.A.ImustB.IcanC.IwillD.Imay2.Jim,_meahand.A.givesB.isgivingC.giveD.willgive3.Letme_ondutytoday.A.amB./C.beD.do4.Lets_ourtime.A.notwasteB.nowastingC.nottowasteD.nowaste5._higher,andyouwillseethehouse.OK.A.IfyoustandB.TostandC.WhenyoustandD.Stand,C,C,C,A,D,Choosethecorrectanswer.,6._forgettowritetomewhenyou_gettherenextTuesday.A.Dont;willB.Please;willC.Please;/D.Dont;/7.Please_doit.A.heB.heletC.lethimD.him8._comein,please.A.WillB.DoC.WontD.Did9._careful!A.BedoB.DobeC.NotD.Notdo10._letanyoneopenthedoor.A.DontB.WillC.NotD.No,D,C,B,B,A,11.LetJohnfinishtheworkallbyhimself,_?A.shallweB.willyouC.doyouD.dowe12.-Letsgohome,shallwe?-_.A.Thatsright.B.ThatsallC.ThatsallrightD.Allright13.Pleaseturnonthelight,_?A.areyouB.shallweC.shallID.willyou14.Donttellhimthefactnow,_?A.shallweB.shallyouC.willyouD.doyou15.Letthechildrennotmakesomuchnoise,_?A.shallweB.willyouC.shallID.doyou,B,D,D,C,B,16._6and4,andyouwillgetten.A.AddedB.AddingC.ToaddD.Add17._lateagain,orIllreportittoyourfather.A.DontbeB.YouarentC.CantbeD.Arent18.Dontinterruptherwhensheisspeaking,_?A.w