英语祈使句(八上unit 8语法).ppt

英语祈使句讲解,八年级上册unit8语法,定义：用于表达命令、请求、劝告、警告、禁止等的句子叫做祈使句。,祈使句通常省略第二人称的主语；,祈使句的动词都为原形。,Goandwashyourhands.Bequiet,please.（Pleasebequiet.）Bekindtooursister.Watchyoursteps.Lookout！Danger！Keepoffthegrass.Noparking.,祈使句的类型：,肯定祈使句,否定祈使句,以let开头的祈使句,No+动名词/名词,其它类型祈使句,肯定祈使句,一、直接以动词原形开头,please可在句首,也可在句末。,Do型。直接以动词原形开头,Be型。Be+表语,Becareful.Bequiet.Pleaselookattheblackboard.Listentomecarefully.Gohomeatonce.,二、肯定祈使句的回答：,肯定回答：Yes,Iwill.,否定回答：Sorry,Icant.Imbusydoingmyhomework.,否定祈使句,否定祈使句=Dont+肯定祈使句（Dont+V原）,Donttalkinclass.Donteatinclass.Dontruninthehallway.Dontdrawonthewall.Dontthroweverywhere.,二、否定祈使句的回答：Ofcourse,Iwont.Sorry,Iwontdothatnexttime.,以let开头的祈使句,一、LetsbdosthLetsbnotdosth,Letusmakefruitsalad.Letyourfathercallmeback.Lethimnotplaybasketballhere.Letthemnotplaythedrumsnow.,二、以let开头的祈使句的回答：Thatsagoodidea./Thatsoundsgood.Oh,No.Itstoohot.Oh,No.LetswatchTVathome.,No+动名词/名词,Nosmoking!Nosmokinginthemeetingroom!Noparking!Nophotos!,其它类型祈使句,Whydontyoudosth?=Whynotdosth?相当于Pleasedosth.,Whydontyoustandup?=Whynotstandup?Whydontyougoouttoplay?=Whynotgoouttoplay?,1.thepopcornmachine.A.TurnonB.TurningonC.ToturnonD.Turnson2.thesandwichbeforeyouwashyourhands.A.EatingB.NoteatingC.DonteatD.Noteat3.-lateforthemeetingnexttime.-Sorry,Iwont.A.DontB.DontbeC.wontbeD.Benot4.Letstoschoolbybike.A.notgoB.nottogoC.dontgoD.notgo5.abananamilkshakeiseasy.A.MakeB.MakesC.MakingD.Made6.-Dontboilthevegetabletoolong.-.A.Yes,IwontB.Yes,IwillC.No,IwillD.No,Iwont,7.addingsomerelishtothesoup?A.WhynotB.WhydontC.WhataboutD.Whatfor8.-Dontdrivetoofast!Itsdangerous.-.Iwillslowdown减速.A.GreatB.CertainlyC.CoolD.Sorry9.-Jace,letsplaytennis.-.A.ThatsoundsgoodB.Yes,IdoC.DontworryD.Yo