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祈使句（imperativesentence）,Washyourhands.Openthedoor,please.Closethewindow.Standup.Sitdownplease.,去洗你的手-表命令请开门。-表请求关上窗。-表命令。起立-表命令请坐下-表请求,Bequite,please.Becareful.Beagoodboy!Beready.,请安静小心做一个好孩子准备好,表达方式,肯定结构:1.Do型(即:动词原形+其它成分)。如:Standup.起立2.Be型(即:Be+其它成分)。如:Becareful!小心!,祈使句,定义表示请求、给予命令或指示的句子叫祈使句。祈使句通常省略主语“you”，动词一律用动词原形。,Dontwashyourhands.Dontopenthedoor,please.Dontturnleft.Dontbequiet,please.(Pleasebequiet.）Dontsitdownplease.,不要洗你的手请不要开门。不要左转不要安静不要坐下,表达方式,否定结构:1.Do型和Be型的否定式都是在句首加dont构成。如:Dontforgetme!不要忘记我!Dontbelateforschool!上学不要迟到!2.有些可用no开头,用来表示禁止性的祈使句。No+名词/动名词。如:Nolitter!不准乱扔杂物Nosmoking!禁止吸烟!Nofishing!禁止钓鱼!,祈使句，无主语，只要动词就可以；表示请求或命令，加上please表客气；如果变成否定句，Dont开头是旋律；NOtalking！是警示，祈使用法要牢记！,牢记，牢记，再牢记,记住了没？,轻松小练习,1.请不要迟到.2.回答这个问题.3.打开窗户,1.Dontbelate.2.Answerthisquestion.3.Openthewindow,Turnleft!,GuessingGame,Turnright!,GuessingGame,GuessingGame,Dontsmoke!Nosmoking!,GuessingGame,Dontplayfootball!,GuessingGame,Noparking!,GuessingGame,Donteat!,GuessingGame,Dontpicktheflowers!,Goupstairs!,GuessingGame,GuessingGame,Godownstairs!,第一关：LetsRead,Dontthrowthingsatthemonkeys.,Dontfeedtheanimals.,Dontwalkonthegrass.,Donttakephotographshere.,Dontleavelitter.,第二关LetsSay,Youcantsleeponthedesk.,Dont_onthe_.,Youcantclimbtreesinthepark.,Dont_.,Youcantsitonthegrass.,_.,sleep,desk,climbtreesinthepark,Dontsitonthegrass,第四关Playagame:Lookandguess,Nosmoking,Donttouch,Donteat./Dontdrink.,Noparking,Bequiet,Letsdoexercise.,1._meahand.A.givesB.isgivingC.willgiveD.give2._careful,Jenny!Thereisatreeinfrontofyou.A.AmB./C.BeD.Was3.Dont_ourtime.A.wasteB.nowastingC.nottowasteD.nowaste4._higher,andyouwillseethehouse.OK.A.IfyoustandB.TostandC.WhenyoustandD.Stand,Exercises:,Thankyou!,
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