8AUnit4-GrammarVIP专享VIP免费

GrammarAGuessingGameDon’tsmoke!Nosmoking!GuessingGameDon’tplayfootball!Turnleft.GuessingGameTurnright!GuessingGameGuessingGameDon’tparkyourcar!GuessingGameDon’teat!GuessingGameDon’tpicktheflowers!Bequiet,please.Don’tmakeanynoise.GuessingGameGoupstairs!GuessingGameGuessingGameGodownstairs!Readandobserve(观察)Turnleft.Turnright!Pleasegoupstairs!Godownstairs!Bequiet,please.Don’tsmoke!Don’tplayfootball!Don’tparkyourcar!Pleasedon’teat!Don’tpicktheflowers!1.祈使句(ImperativeSentence)的概念祈使句表示请求、命令等。它的主语是you（听话人），通常不说出。祈使句肯定结构中的谓语动词一律用动词原形。祈使句末用惊叹号或句号。2.祈使句的结构1)祈使句的肯定结构①Do型（以行为动词原形开头），例如：Sitdown!坐下！Standup!起立！②Be型（以be开头），例如：Bequiet!安静！Becareful！小心！③Let型（letsbdosth），例如：Letmetry.让我试试看。Let’slookatthemap.让我们看看地图。●let’s是letus的简略式。2)祈使句的否定结构，一律在肯定结构前加Donot(Don’t)。例如：Don’tgothere,please.请别去那儿。Don’tbelateforclass!上课别迟到！Don’tlethimin.不要让他进来。有些可以用No开头用来表示禁止性的祈使句如：Nosmoking!禁止吸烟Nofishing!禁止钓鱼●表示请求、劝告的祈使句还常常在句前或句末加上please,构成句式：Please…或…,please.以使语气更加缓和或客气。例如：Pleasestandup.Standup,please.请站起来。Pleasehavearest.Havearest,please.请休息一下。祈使句•祈使句,无主语,只用动词原形就可以.•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。Millieisteachingherclassmateshowtomakecardstohelpthemrememberthingsbetter.LookatthepicturesandhelpMilliecompletetheinstruction.Millieisteachingherclassmateshowtomakecardstohelpthemrememberthingsbetter.LookatthepicturesandhelpMilliecompletetheinstruction.Howtomakecards_____outpiecesofcardwithapairofscissors.Cutcutdrawgivekeeplooktrywrite_____somewordsorasentenceoneachcard.Writecutdrawgivekeeplooktrywrite_____apictureaboutthewordsorsentenceontheothersideofthecard.Drawcutdrawgivekeeplooktrywrite_____atthepictureand___torememberwhatisontheotherside.LooktrycutdrawgivekeeplooktrywritePlease_________(not)up.____trying,andyouwillfindyoucanrememberthingsbetter.don’tgiveKeepcutdrawgivekeeplooktrywrite中考链接：Kate,_______yourhomeworkheretomorrow.A.bringB.bringsC.tobringD.bringing有时为了明确的向对方提出请求或发出命令，可加人物姓名，但姓名要与句子隔开。GrammarBe.g.YoushouldknowalittleaboutDIY.Youshouldnotputsomanybooksontheshelf.Yourwatchisbroken.Youhadbetterbuyanewone.Youhadbetternotbelateforschool.当我们给他人提建议时，可以用hadbetter和should，表示“最好”或“应该”做某事，hadbetter的语气比should强一些。Youhadbetterturnoffthelightsbeforeleavingtheclassroom.离开教室前你最好先把灯关了。Youshouldexercisemore.你应该多锻炼。hadbetter(常简略为’dbetter)，是一固定词组，后面必须跟动词原形。构成：hadbetterdosth.句型。You’dbettergotohospitalatonce.你最好立即去医院看病。Tom,you’dbettergotheretoday.汤姆，你最好今天去那儿。hadbetter的否定式是将not直接放在hadbetter的后面(hadbetternotdosth)。Youhadbetternotmissthelastbus.你最好不要错过末班公共汽车。should后面也要跟动词原形，且没有人称和数的变化。Youshouldstopsmoking.你应该戒烟。should的否定式是shouldnot/shouldn’t。Youshouldn’tdrinkanddrive.你不应该喝酒后开车。DIYadviceSuzyisgivingDIYadvicetoherclassmates.Readtheadvicebelow.HelpSuzymakesentenceswithshould(not)orhadbetter(not).SuzyisgivingDIYadvicetoherclassmates.Readtheadvicebelow...