祈使句

*1.定义：用于表达命令、请求、劝告、建议、禁止等的句子叫做祈使句。祈使句的主语一般为第二人称，但往往省去不用，通常以动词原形开头。e.g.Openthedoorplease!但有时为了指明向谁请求或发出命令，也可以说出主语。e.g.Alice,youcloseyourbook.祈使句末尾用惊叹号或句号，句子用降调。祈使句ImperativeSentence2.祈使句的否定式在动词原形前加don’t.e.g.Don’tbelateagain.Pleasedon’tforgettotakeyourmedicine.3.祈使句的强调式e.g.Dobeontime.Docomeearly.4.以let开头的祈使句Letmehaveatry.Let’snothurry.5.祈使句的回答：——Don’tforgettocometomybirthdaypartytomorrow.——________.A.Idon’tB.Ican’tC.Iwon’tD.Ihaven’t.——I’mleavingnow.——________youturnoffthelights.A.TomakesureB.Makesure.C.MadesureD.Makingsure.1.It’sanimportantmeeting.______(not,be)late.2._______(not,make)anynoise!Yourmotherissleeping.3.________(not,speak)withyourmouthfulloffoodand_____(be)polite.4.Larry,_________(not,leave)yourhomeworkfortomorrow.5._____(look)out!Acariscoming.6.Let’s________(Not,say)anythingaboutit.7.Wearmoreclothes,oryou_________(catch)acold.Don’tbeDon’tmakeDon’tspeakbedon’tleaveLooknotsaywillcatch1.咱们一起玩,好吗？2.借我一些钱，好吗？3.明天早点起床，否则你会赶不上火车！4.他不诚实。请不要相信他！Let’splaytogether,_______?Letushavefuntogether!,_______?Pleaselendmesomemoney,______?Getupearlytomorrow,oryoucan’tcatchthetrain.shallwewillyouwillyouHeisnothonest.Don’tbelievehim.2、祈使句的另外表达方式（1）“No＋名词或动名词”表示祈使句“No＋名词或动名词”结构表示禁止的祈使，一般用于指示、标牌、布告等。Nosmoking!禁止吸烟！Nospitting!不准随地吐痰！Nolitter!不准乱扔果皮纸屑！Noentry!不许入内！Nothoroughfare!禁止通行！Noscribblingonthewall!墙上不准涂写！Noadmittanceexceptonbusiness!非公莫入！“祈使句＋and/then＋陈述句”结构（1）祈使句+and(then，andthen)+陈述句在这个句型中，前边祈使句+and(then，andthen)相当于if引导的条件句。Comeearly，andyou’llcatchthefirstbus.=Ifyoucomeearly，you’llcatchthefirstbus.来早点，你就能赶上第一班汽车。Useyourhead，thenyou’llfindaway.开动脑筋，那么你就会找到办法。（2）祈使句+（or，orelse，otherwise）+陈述句在这个句型中，前边祈使句+（or，orelse，otherwise）相当于unless引导的条件句。Workhard，otherwise，you’llfail.=Unlessyouworkhard，you’llfail.努力干，要不，你会失败的。Useyourhead，orelseyouwon’tfindaway.=Unlessyouuseyourhead,youwon’tfindaway.开动脑筋，否则，你就找不到办法。