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1、一、本单元语法Unitsix复习三、祈使句的肯定形式be型（系动词原形be＋表语＋其他）Becareful!Don‘tgotoohigh.Bequiet,everyone!祈使句一、什么是祈使句？祈使句（ImperativeSentence）可以表达说话人的意愿、请求、叮嘱、号召、命令或建议的句子。二、祈使句的特征1.它的主语you（听话人）通常省略。2.结构：动词原形+其他。3.句子末尾用感叹号或句号，读时用降调。2)do型（行为动词＋宾语＋其他）Comein,please!Pleaseopenyourbooks!3)let型（Let＋宾语＋动词原形＋其他）Letmehavealook.
2、Letmehelpyou.1)be型（Don't＋be＋表语）Don'tbelazy!2)do型（Don't＋行为动词原形＋其他）Don'tthrowtheballlikethat.Don'tworry.I'llsoonbeallright.Don’tanybodysayaword.2.祈使句的否定形式3)let型有两种否定形式：1)Let＋宾语＋not＋动词原形＋其他。Lethimnotgothere.Let'snotwastetime.2)Don't＋let＋宾语＋动词原形＋其他。Don'tlethergothere.Don'tletthewaterrunintotheroom.4)N
3、o+v-ing/n.禁止做某事Noparking/smoking/fire！5)never+动词原形.永不做某事Nevergiveup！Neverdoitlikethat.Neverbelateagain.祈使句的应答应答祈使句要用将来时。Pleaseremembertobringyourhomeworkheretomorrow.→Yes,Iwill.Pleasedon’tsmokehere.→Sorry,Iwon’t.祈使句的反意疑问句一般情况下,祈使句的反意疑问句是willyou?但是当祈使句是Let’s句型时,反意疑问句是Shallwe?当祈使句是Letme句型时,反意疑问句是Sha
4、llI?Don’tbelateforschool,willyou?Let’sgototheparktomorrow,shallwe?祈使句的相关句型“祈使句＋and/or+一般将来时的结果状语从句”结构可以转换成一个由if引导的条件状语从句。如：●Workhard,andyouwillpasstheexam.=Ifyouworkhard,you’llpasstheexam.=Ifyoudon’tworkhard,youwon’tpasstheexam.●Hurryup,oryou’llbelate.=Ifyouhurryup,youwon’tbelate.=Ifyoudon’thurryu
5、p,you’llbelate.情景反应1.Whensomeoneisclimbingatree,youshouldsay“Don’tclimbtoohigh”.2.Whenyouareindander,youshouldsay“Help!”.3.Whensomeoneisplayingwithknives,youshouldsay“Becarefulwithknives”.4.WhenDannythinkshisarmisbroken,youshouldsay“Don’tworry!You’llrecoversoon”.1)—Writetomewhenyougethome.—_______
6、__.(2001北京春考)A.Yes,ImustB.Yes,IshouldC.Yes,IwillD.Yes,IcanC2)_______someofthisjuice—perhapsyou’lllikeit.A.TryingB.TryC.TotryD.HavetryB3)___straightonandyou’llseeachurch.A.GoB.GoingC.IfyougoD.WhengoingA4)—Englishhasalargevocabulary,hasn’tit?—Yes._______morewordsandexpressionsandyouwillfinditeasiert
7、oreadandcommunicate.A.KnowB.KnowingC.ToknowD.Known5)Standoverthere____you’llbeabletoseeitbetter.A.orB.whileC.butD.andAD6)—Don'tforgettocometomybirthdaypartytomorrow.—________.(NMET1994)A.Yes,Iwon’tB.No,Iwon’tC.No
