Unit6Unit6Turnleft!Turnright!Walkonthezebracrossing!Goupstairs!Don’tsmoke!Nosmoking!Don’tparkyourcar!Don’teat!Don’tpicktheflowers!ReadandobservethedifferenceTurnleft!Turnright!Don’tsmoke!Don’tparkyourcar!Pleasedon’teat!Don’tpicktheflowers!Pleasegoupstairs!Walkonthezebracrossing!Drawtheconclusion(得出结论)祈使句的结构如下：(Please)+dosth.(Please)+Don’tdosth.祈使句的句型Bequiet.Pleasehaveaseat.David,Lookout.Don’tbeafraid.Pleasedonotmakeanoise.Alan,don’tbelate.1.动词原形+…2.Please+动词原形…3.人名+动词原形…肯定否定在动词前面加don’t否定祈使句的定义•祈使句表示请求、命令、建议等等。•谓语动词一律用原形。•通常说话对象（主语）是第二人称you,you常被省略，句末用惊叹号或者句号。祈使句句式详解1.肯定的祈使句（1）动词原形+其他(与please连用以使语气委婉)Standup,please.=Pleasestandup.请起立。（2）Be+adj.Becareful!小心/当心！Bequiet!别说话!（3）Let's+动词原形Let’sgotoschooltogether.咱们一起上学去吧。祈使句句式详解2.否定的祈使句（1）Don't+动词原形+其他Don'tstandup.别站起来。Don'tforgetyourhomework.不要忘记你的作业。（2）Don't+be+adj.Don'tbeafraid.别害怕Don'tbecareless.别粗心。（3）Don't+letsbdosth.Let's(letsb)+not+动词原形Don'tletthemplaywithfire.别让他们玩火。Letthemnotplaywithfire.让他们别玩火。祈使句，无主语，只用动词就可以；表示请求或命令，加上please表客气；如果变成否定句，Don't开头是规律；Notalking!是警示,祈使句用法要牢记。1.Jim,_____meahand.A.givesB.isgivingC.giveD.willgive2.Let's____ourtime.A.notwasteB.nowastingC.nottowasteD.nowaste3.—____higher,andyouwillseethehouse.—OK.A.IfyoustandB.TostandC.WhenyoustandD.StandChoosethecorrectanswer.4._____forgettowritetomewhenyougettherenextTuesday.A.Don'tB.PleaseC.NotD.Aren't5.Please___doit.A.heB.heletC.lethimD.him6._____letanyoneopenthedoor.A.Don'tB.WillC.NotD.No7.____6and4,andyouwillgetten.A.AddedB.AddingC.ToaddD.Add8.____lateagain,orI’llreportittoyourfather.A.Don’tbeB.Youaren’tC.Can’tbeD.Aren’t9._____getoffthebusuntilitstops.A.DoB.Can’tC./D.Don’t10.—Callmewhenyougethome.—OK,____.A.ImustB.IcanC.IwillD.Imay11.—Don'tbelateagain.—Sorry,____.A.ImayB.ImustC.Iwon'tD.IwillinclassontheroadBequiet.Takenotes.Listentotheteachercarefully.Don'teatinclass.Don'tsleepisclass........Walkonthezebracrossing.Becareful.Don'tplayfootball.Don'trunfast.Don'tpush.......Writeapassageaboutoneofthepictures.
