高中英語語法-祈使句PPT-課件

GrammarImperatives(祈使句)

Nosmoking!Don’tdrink!Attention！Parking!Whatdotheymean?Grammar-1.Look&SayLookatthesignsandsaywhattheydo.

Don’tgofasterthan90kph.Turnright.Don’twalk./Nopedestrians.Don’tturnleft./Noleftturn.Don’tstop./NoparkingTheygiveinstructions一.祈使句的定義

用于表達命令、請求、勸告、警告、禁止等的句子叫做祈使句。Lookatthefollowingsentences:Goandwashyourhands.（去洗手?！睿〣equiet,please.（請安靜?！埱螅〣ekindtooursister.（對姊妹要和善。——勸告）Lookout！Danger?。ㄐ⌒?！危險！—警告）Keepoffthegrass.（勿踐草坪?！梗〤anyoutellmewhatareimperatives?定義:祈使句無_____，主語you常______；動詞_____謂語當，句首加_____變否定；主語省去原形Don’tArethefollowingsentencesimperative?(discussinpairs)Heisalwayssleepingintheclass.It’sabeautifulday,isn’tit?Tellmeyourname,please?Willhecometonight?Mary,comehere!(√)(×)(×)(×)(√)二.祈使句的結構1.Observation

What’rethefeaturesofimperative?Listentomecarefully.Comeinandsitdown,please.Don’tclosethewindow–it’shot.Bequiet!Beagoodboy!Let’stryourbesttoimproveourenvironment.ListenComesitDon’tBeLet’sBe2.ConclusionDo型（以行為動詞開頭）

Standup! Don’tstandup!/Neverstandup!Be型（以be動詞開頭）

Becareful. Don’tbelate./Neverbelate.Let型（以let開頭）

Lethimin.

Letmehelpyou.◆肯定結構:◆否定結構:①Do型和Be型的否定式都是在句首加don’t構成。如:不要忘記我!

Don’tforgetme!/Don’tbelate!②Let型的否定式有兩種:“Don’t+let+賓語+動詞原形+其它成分”和“Let+賓語+not+動詞原形+其它成分”。如:別讓他走。

Don’tlethimgo./Lethimnotgo.③有些可用no開頭,用來表示禁止性的祈使句。如:禁止吸煙！禁止釣魚！

Nosmoking!Nofishing!用祈使句完成下列句子。1._____onthepavement（人行道）.2._____inthebicyclelanes.3.______atredtrafficlights.4.______therulesoftheroad.Go

RideStop

Keep

go,keep,look,ride,stop,stay,watchout5._________forpedestrians（行人）.6.______behindyoubeforeyouturnrightorleft.7.__________inthemiddleoftheroad.LookWatchoutDon’tstaygo,keep,look,ride,stop,stay,watchout三.祈使句中應注意的幾個問題

Dobepatient!Dositdown.Dowritebackwhenyoureceivehisletter.Tom,youcleantheroom.Don’tyoubelateagainnexttime!Whatisdifferentnow?1.加強祈使句語氣的方式:Do/you+動詞原形

此句型為“條件與結果”并存的句式，其中的祈使句可轉化為if條件句。e.g.Workhardandyouwillsucceed.=Ifyouworkhard,youwillsucceed.Hurryup,oryouwillmissthelastbus.=Ifyoudon’thurryup,youwillmissthelastbus.2.祈使句(,)+and/or+簡單句

是一種固定句式。這一句式也可以演變?yōu)椤懊~性短語+and+簡單句”的形式。Moretime,andIcouldhavedoneitbetter.如果多給我一些時間，我可以做得更好。3.祈使句的附加疑問句Openthedoor,___________________?Don’tforget,_________________?Letusgothere,______________?Let’sgothereatonce,__________?willyou?/（won’tyou）willyoushallwewillyouOpenDon’tLet’sLetuse.g.Putonyourcoat,please—it’sverycoldoutside.TurndowntheTVset—thebabyisasleepintheroom.4.

祈使句+波折號+附加信息；附加信息常表示發(fā)出祈使動作的原因。2.________remembertoturnoffthelightsbeforeyouleavethelab.A.BesureB.DoC.MakesureD.Does1.

Standoverthere___you’llbeabletoseeitbetter.A.orB.whileC.butD.and走近高考：3.Letuspass,_______?A.shan’tweB.shallweC.won’tweD.willyou4.

Waitaminute,______?A.shallyouB.willyouC.doyouD.don’tyou5.___downtheradio—thebaby’sasleepinthenextroom.A.TurningB.TurnedC.TurnD.Toturn祈使句以動詞原形開頭。6You’dbetternotsmokehere,_______?A.willyouB.shallyouC.haveyouD.hadyou有hadbetter

的句子構成反意疑問句,用had

構成。7.Don’tforgettophoneme,______?A.doyouB.needn’tyouC.won’tyouD.willyou否定祈使句的反意疑問句用will

構成。8.Let’shaveacupoftea,________?A.shallyouB.willyouC.shallweD.won’tyou以let’s開頭的祈使句用shallwe,

以letus開頭的祈使句用willyou,構成反意疑問句。9.________,Ithink,andtheproblemcouldbesettled.A.Ifyoudon’tdoubtyoureffortsB.AsyoukeepupyourspiritsC.MakinggreateffortsD.Abitmoreefforts10.It’sreallyverydangerous.Onemorestep,______thebabywillfallintothewell.A.or

B.sothat

C.and

D.if

Grammar-6.Practice(3ms)---Englishhasalargevocabulary,hasn’tit?---Yes._______morewordsandexpressionsandyouwillfinditeasiertoreadandcommunicate.A.Know

B.Knowing

C.Toknow

D.Known2．Standoverthere_______you’llbeabletoseeitbetter.

A.or

B.while

C.but

D.and

---I’veneverseenanyonerunsofast.

---______Davidgo.

A.justwatch

B.justtowatch

C.justwatching

D.justhavingwatched

ADAGrammar-6.Practice(3ms)

4.---Don'tforgettomybirthdaypartytomorrow.

---________.

A.Yes,Iwon’t

B.No,Iwon’t