《高中英语语法祈使句课件.ppt》由会员分享，可在线阅读，更多相关《高中英语语法祈使句课件.ppt（31页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、GrammarImperatives(祈使句)No smoking!Dont drink!Attention！Parking!Whatdotheymean?Grammar-1.Look&Say Look at the signs and say what they do.Dontgofasterthan90kph.Turnright.Dontwalk./Nopedestrians.Dontturnleft./Noleftturn.Dontstop./NoparkingTheygiveinstructions一一.祈使句的定义祈使句的定义 用于表达命令、请求、劝告、警告、用于表达命令、请求、劝告
2、、警告、禁止等的句子叫做祈使句。禁止等的句子叫做祈使句。Lookatthefollowingsentences:nGoandwashyourhands.（去洗手。（去洗手。命令）命令）nBequiet,please.（请安静。（请安静。请求）请求）nBekindtooursister.（对姊妹要和善。（对姊妹要和善。劝告）劝告）nLookout！Danger！（小心！危险！（小心！危险！警告）警告）nKeepoffthegrass.（勿践草坪。（勿践草坪。禁止）禁止）Can you tell me what are imperatives?定义定义:祈使句无祈使句无_，主语，主语you常常_；
3、动词动词_谓语当，句首加谓语当，句首加_变否定；变否定；主语主语省去省去原形原形DontArethefollowingsentencesimperative?(discussinpairs)Heisalwayssleepingintheclass.Itsabeautifulday,isntit?Tellmeyourname,please?Willhecometonight?Mary,comehere!()()()()()n二.祈使句的结构1.Observation Whatre the features of imperative?Listentomecarefully.Comeinandsi
4、tdown,please.Dontclosethewindowitshot.Bequiet!Beagoodboy!Letstryourbesttoimproveourenvironment.ListenComesitDontBeLetsBe2.Conclusion Do型型（以行为动词开头）（以行为动词开头）Standup!Dontstandup!/Neverstandup!Be型型（以（以be动词开头）动词开头）Becareful.Dontbelate./Neverbelate.Let型型（以（以let开头）开头）Lethimin.Letmehelpyou.肯定结构肯定结构:n 否定结构否定
5、结构:n Do型和型和Be型的否定式都是在句首加型的否定式都是在句首加dont构成。构成。如如:不要忘记我不要忘记我!nDont forget me!/Dont be late!n Let型的否定式有两种型的否定式有两种:“Dont+let+宾语宾语+动词原形动词原形+其它成分其它成分”和和“Let+宾语宾语+not+动动词原形词原形+其它成分其它成分”。如。如:别让他走。别让他走。nDont let him go./Let him not go.n 有些可用有些可用no开头开头,用来表示禁止性的祈使句。用来表示禁止性的祈使句。如如:禁止吸烟！禁止钓鱼！禁止吸烟！禁止钓鱼！nNo smokin
6、g!nNo fishing!用祈使句完成下列句子。用祈使句完成下列句子。1._onthepavement（人行道人行道）.2._inthebicyclelanes.3._atredtrafficlights.4._therulesoftheroad.Go RideStop Keep go,keep,look,ride,stop,stay,watchout5._forpedestrians（行人（行人）.6._behindyoubeforeyouturnrightorleft.7._inthemiddleoftheroad.LookWatchoutDontstaygo,keep,look,rid
7、e,stop,stay,watchoutn三三.祈使句中应注意祈使句中应注意的几个问题的几个问题 Dobepatient!Dositdown.Dowritebackwhenyoureceivehisletter.Tom,youcleantheroom.Dontyoubelateagainnexttime!Whatisdifferentnow?1.加强加强祈使句语气的方式祈使句语气的方式:Do/you+动词原形动词原形此句型为此句型为“条件与结果条件与结果”并存的句式，其并存的句式，其中的祈使句可转化为中的祈使句可转化为if条件句条件句。e.g.Workhardandyouwillsucceed
8、.=Ifyouworkhard,youwillsucceed.Hurryup,oryouwillmissthelastbus.=Ifyoudonthurryup,youwillmissthelastbus.2.祈使句祈使句(,)+and/or+简单句简单句 是一种固定句式。是一种固定句式。这一句式也可以演变为这一句式也可以演变为“名词名词性短语性短语+and+简单句简单句”的形式。的形式。Moretime,andIcouldhavedoneitbetter.如果多给我一些时间，我可以做得更好。如果多给我一些时间，我可以做得更好。3.祈使句的祈使句的附加疑问句附加疑问句Open the door
9、,_?Dont forget,_?Let us go there,_?Lets go there at once,_?will you?/（wont you）will youshall wewill youOpenDontLetsLet use.g.Putonyourcoat,pleaseitsverycoldoutside.TurndowntheTVsetthebabyisasleepintheroom.4.祈使句祈使句+波折号波折号+附加信附加信息息；附加信息常表示发出祈使动作附加信息常表示发出祈使动作的原因。的原因。2._remembertoturnoffthelightsbeforey
10、ouleavethelab.A.BesureB.DoC.MakesureD.Does1.Standoverthere_youllbeabletoseeitbetter.A.orB.whileC.butD.and走近高考：走近高考：3.Letuspass,_?A.shantweB.shallweC.wontweD.willyou4.Waitaminute,_?A.shallyouB.willyouC.doyouD.dontyou5._downtheradiothebabysasleepinthenextroom.A.TurningB.TurnedC.TurnD.Toturn祈使句以祈使句以动词原
11、形动词原形开头。开头。6Youdbetternotsmokehere,_?A.willyouB.shallyouC.haveyouD.hadyou有有hadbetter的句子构成反意疑问句的句子构成反意疑问句,用用had构成。构成。7.Dontforgettophoneme,_?A.doyouB.needntyouC.wontyouD.willyou否定祈使句的反意疑问句用否定祈使句的反意疑问句用will构成。构成。8.Letshaveacupoftea,_?A.shallyouB.willyouC.shallweD.wontyou以以lets开头的祈使句用开头的祈使句用shallwe,以以l
12、etus开头的祈使句用开头的祈使句用willyou,构成反意疑构成反意疑问句。问句。9._,Ithink,andtheproblemcouldbesettled.A.IfyoudontdoubtyoureffortsB.AsyoukeepupyourspiritsC.MakinggreateffortsD.Abitmoreefforts10.Itsreallyverydangerous.Onemorestep,_thebabywillfallintothewell.A.orB.sothatC.andD.ifGrammar-6.Practice(3ms)1.-Englishhasalargevo
13、cabulary,hasntit?-Yes._morewordsandexpressionsandyouwillfinditeasiertoreadandcommunicate.A.KnowB.KnowingC.ToknowD.Known2Standoverthere_youllbeabletoseeitbetter.A.orB.whileC.butD.and3.-Iveneverseenanyonerunsofast.-_Davidgo.A.justwatchB.justtowatchC.justwatchingD.justhavingwatchedADAGrammar-6.Practice
14、(3ms)4.-Dontforgettomybirthdaypartytomorrow.-_.A.Yes,IwontB.No,IwontC.No,IwillD.Yes，Iwill5.Besuretowritetous,_?A.willyouB.arentyouC.canyouD.mustntyou6.Onemoreweek,_wewillaccomplishthetask.A.orB.sothatC.andD.ifBACGrammar-6.Practice 7._bloodifyoucanandmanyliveswillbesaved.A.GivingB.GiveC.GivenD.Togive8._thisbookandtellmewhatyouthinkofit.A.LookthroughB.LookonC.LookintoD.Lookup9._itwithmeandIllseewhatIcando.A.WhenleftB.LeavingC.IfyouleaveD.LeaveBAD