if真实条件句PPT课件

1、.,1,if引导的真实条件句,Ifyouwanttowatchthisfilm,Iwillbuytwotickets.IfIbuytwotickets,wecangotothecinema.Ifwearewatchingthefilm,pleasekeepquite.Ifyouhavefinisheddinner,Illaskthewaiterforthebill.,.,2,主将从现,主句将来时,从句现在时,一般将来时,祈使句,含情态动词,一般现在时,现在进行时,现在完成时,.,3,如果你拉猫的尾巴，它就会抓(scratch)你。Ifyoupullthecatstail,itwillscrat

2、chyou.如果你想减肥，你应该少吃糖。Ifyouwanttoloseweight,youmusteatlesscandy.,.,4,LectureTwelveGrammar,if引导真实条件句中主谓语省略,.,5,Ifheisintrouble,hewillturntopoliceforhelp.Ifintrouble,hewillturntopoliceforhelp.Ifyouareofferedhelp,youmustneverforgettosayThankyou.Ifofferedhelp,youmustneverforgettosayThankyou.,.,6,If(youare

3、)inRome,youmustdoasRomansdo.,主句，从句主语相同,从句谓语中有be,方法一：主从句主语相同,if从句中有be,则if从句中主语、谓语可省略。,.,7,Haveatry,1.IfyouarestudyingEnglish,youmustpayattention.2.Iftworivalsmeet,thestrong-mindedonewillwin.3.Ifheisfree,hewillgowithus.4.Ifyouwanttohavehappiness,youwillgethealth,knowledgeandvirtue.,.,8,1.如果冰被加热，它就会变成水

4、。Ifheated,theicewillturntowater.2.如果你在武汉，你可以尝尝热干面。IfinWuhan,youcantryhot-drynoodles.3.如果你正在开车，你应该专心。Ifdriving,youmustdrivewithconcentration.,.,9,Ifitisnecessary,hewillturntopoliceforhelp.If(itis)necessary,hewillturntopoliceforhelp.Ifitispossible,hewillcallthepolice.If(itis)possible,hewillcallthepoli

5、ce.,.,10,If(itis)necessary,Illexplaintoyouagain.,方法二：if从句中主语是it,谓语中有be,则if从句中主语、谓语可省略(itbe省略)。,.,11,Haveatry,1.回答这些问题，如果可能的话不要参考书本。Answerthesequestions,ifwithoutreferringtothebooks.2.如果有必要，你可以帮我们做点事。If,youcanhelpustodosomething.3.如果明天天气好，我们就去划船。If,wewillgoboating.,(itis)necessary,(itis)finetomorrow,

6、(itis)possible,.,12,4.如果有必要，你要再试一次。If(itis)necessary,youwilltryagain.5.如果是真的，这条信息会很重要。Thisinformationwillbeimportant,if(itis)true.,.,13,unless引导真实条件句,Wecantwatchthefilmunlesswebuytickets.Wecantwatchthefilmifwedontbuytickets.Wewillmissthefilmunlesswehurryup.Wewillmissthefilmifwedonthurryup.,.,14,如果你3

7、0岁还没结婚，你就成了一个剩女。Unlessyougetmarriedinyour30,youwillbea3Slady.2.如果你不积极寻找白马王子，你就会错失良机。UnlessyouhuntforyourMr.Rightactively,youwillmisstheopportunity.,unless=ifnot(除非否则，如果不),.,15,Haveatry,1.除非你确立了目标，否则你就会失去方向。Unlessyousetgoals,youwillloseyourway.2.如果你不快点，你就见不到Eason。Unlessyouhurryup,youwontseeEason.,.,1

8、6,主谓语省略,IfEasonisnotinvited,hewontcometotheparty.UnlessEasonisinvited,hewontcometotheparty.Ifnotinvited,hewontcometotheparty.Unlessinvited,hewontcometotheparty.,.,17,Ifitisnotnecessary,youdbetternottointerruptEason.Unlessitisnecessary,youdbetternottointerruptEason.Ifnotnecessary,youdbetternottointer

9、ruptEason.Unlessnecessary,youdbetternottointerruptEason.,.,18,Haveatry,1.Unless()tospeak,youmustremainsilentattheconference.invitedB.invitingC.beinginvitedD.havinginvited2.Theschoolrulesstatethatnochildshallbeallowedoutoftheschoolduringtheday,()accompaniedbyanadult.A.onceB.whenC.ifD.unless,A,D,.,19,3.如果没必要，你最好不要查字典。，youdbetternotrefertothedictionary.4.如果明天不下雨，我们就去野餐。,wewi