Module2TrafficJamGrammarImperatives(祈使句)

Nosmoking!Don’tdrink!Attention！Parking!Whatdotheymean?Grammar-1

Lookatthesignsandsaywhattheydo.

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

用于表達(dá)命令、請求、勸告、警告、禁止等的句子叫做祈使句。Lookatthefollowingsentences:Goandwashyourhands.（去洗手?！〣equiet,please.（請安靜?！〣ekindtooursister.（對姊妹要和善。——）Lookout！Danger?。ㄐ⌒?！危險！—）Keepoffthegrass.（勿踐草坪?！〤anyoutellmewhatareimperatives?定義:命令請求勸告警告禁止祈使句無_____，主語you常______；動詞_____謂語當(dāng)，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(jié)構(gòu)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(jié)構(gòu):◆否定結(jié)構(gòu):①Do型和Be型的否定式都是在句首加don’t構(gòu)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(yīng)注意的幾個問題

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

此句型為“條件與結(jié)果”并存的句式，其中的祈使句可轉(zhuǎn)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.祈使句的反意疑問句Openthedoor,___________________?Don’tforget,_________________?Letusgothere,______________?Let’sgothereatonce,__________?willyou?/（won’tyou）willyoushallwewillyouOpenDon’tLet’sLetuse.g.Putonyourcoat,please—it’sverycoldoutside.TurndowntheTVset—thebabyisasleepintheroom.4.

祈使句+破折號+附加信息；附加信息常表示發(fā)出祈使動作的原因。1.

____________（not,be)late.2.____________(dust)thedressingtable.3.____________(not,speak)withyourmouthfulloffood.4.____________(not,talk)and______(read)abook.1用所給詞的適當(dāng)形式填空：Don'tbeDustDon'tspeakDon'ttalkread5.____________(not,drop)thenicevase,Sam.6._________(look)out!Acariscoming.7._________(give)ustenyearsandjustseewhatourcountrywillbelike.Don'tdropLookGive8._________(not,let)thebabycry.9.Openthewindowand______(shut)thedoor.10.Let's_________(sweep)thefloor.祈使句以動詞原形開頭。Don'tletshutsweepHomeworkFinishthe