祈使句的用法及练习

祈使句的用法及练习一、含义用来表示请求、命令、劝说、叮嘱等的句子就是祈使句。祈使句一般以动词原形开头。二、形态（一）Be型(be+adj)Becareful!Bedangerous!Bequiet!（二）Do型(Do代表动词原形)Openthedoor!Closethewindow!Goandplayfootball!（三）Let's或Letus型Let'sgohome!LetushelpMary!Letmecleantheroom!（四）No+动名词，多用在标语禁令中Nosmoking!Noparking!Nospitting!No+动名词可以与Don't+动词原形替换。Nosmoking!=Don'tsmoke!三、否定形式Be型和Do型前直接加Don't，Let's型可前面直接加Don't或let's后加not。Don'tbecareful!Don'topenthedoor!Don'tlet'sgohome!/Let'snotgohome!四、反意疑问句祈使句的反意疑问句一般用willyou?Let's---用shallwe?Letus---用willyou?Openthedoor,willyou?Let'sgohome,shallwe?LetushelpMary,willyou?五、练习题（一）用括号内所给词的适当形式填空1．It'sanimportantmeeting.______(notbe)late.2．_____(look)out!Acariscoming!3．________(notmake)anynoise!Thebabyissleeping.4．Let's_______(notsay)anythingaboutit.5．________(notlet)thebabycry.6．_____(read)aloud,please.7．_________(nottalk)withyourclassmateintheclass.（二）选择题1．Herdoctorsaid:____worksohardAstopBDon'tCcan'tDNo2．Sindy,____tobehereat8o'clock.AissureBissurethatCwillbesureDbesure3．_____himthesecret,willyou?ADon'ttellBNottotellCNottellingDNotelling4．Please_____lookoutside,lookattheblackboard.AnotBdon'tCaren'tDcan't5．John,readthetextforus,_____?AdoesheBwillheCdoyouDwillyou6．Let'sdoitatonce,_____?AshallweBwillyouCdoweDdoyou7．Letusdoitatonce,____?AshallweBwillyouCdoweDdoyou8．_____inbed,It'sbadforyoureyes.ANottoreadBDon'treadCDon'ttoreadDNotread9．____smoking!ADon'tBNoCDon'ttoDBenot