Unit4Grammar课件译林版九年级（2012）英语上册

Unit4GrowingupGrammarIt'sbeenalongdaywithoutyoumyfriend.AndI'lltellyouallaboutit____Iseeyouagain.We'vecomealongwaywhere

webegan.OhI'lltellyouallaboutit____Iseeyouagain._____Iseeyouagain.whenwhenWhen时间状语从句Enjoyavideo常见引导词：before,after,when,while,since,till/until,assoonas,

wheneverTimeclausee.g.Whentheweatherisgood,mygrandpalikesgoingfishing.Thesuncameoutafterthestormstopped.时间状语从句是指在复合句中充当时间状语的句子。PresentationGrammarAPresentatione.g.Closethewindowsbeforeyouleavetheroom.IwenttoschoolafterIfinishedmybreakfast.before&after强调动作的先后关系。before:在...之前after:在...之后before和after作连词,后面加句子;作介词,后面加名词或doing。1.Closethewindowsbeforeyouleavetheroom.Closethewindowsbefore________(leave)theroom.从句在前，用逗号隔开2.IwenttoschoolafterIfinishedmybreakfast.

Iwenttoschoolafter_________(finish)mybreakfast.leavingfinishing=Beforeyouleavetheroom,closethewindows.=AfterIfinishedmybreakfast，Iwenttoschool.PracticePresentationwhen引导某个时刻发生的事情Whenheenteredtheroom,everyonelookedathim.引导某段时间发生的事情WhenIwasplayingcomputergames,mymothercamehome.从句的谓语动词可以是延续性动词，也可以是非延续性动词。Presentationwhile引出某个时间段发生的事情WhileIwasplayingcomputergames,mymothercamehome.表示两个动作作同时发生Iwasreadingwhilemymotherwascooking.表示两者的对比（“而，然而”，并列连词）AnnlikesteawhileLilypreferscoffee.while引导时间状语从句，从句的动词必须是延续性动词【注意】while后面还可以跟表示状态的词。e.g.WhileIwasinBeijing,Ivisitedalotofplaces.e.g.When(sheis)introuble,shealwaysasksformyhelp.While(hewas)attendingjuniorhigh,Spudtriedoutfortheschoolteam.when&while拓展当主句和从句的主语一致，并且从句的谓语中有be动词的某种形式时，可以省略从句的主语和be动词,构成when/while+-ing结构1.Thedaysgetlonger_________springcomes.2._____________theboyswereplayingfootball,itrained.3.Iwasabouttoleave_______thephonerang.4.Jackisstrong______hisbrotherisweak.5.shealwaysasksmeforhelp,___________(sheis)introuble.Filltheblankswith“when”&“while”whenwhenWhen/Whilewhen/whilewhilePracticeIgotojoggingeverymorning.ThenIhavebreakfast.________________________________________2.Ipractisedplayingbasketballforhours.Ifelttiredout.________________________________________3.ImetPeter.Iwaswaitingatthebusstop.________________________________________4.IwaswatchingTV.Ireceivedacallfrommyuncle.__________________________________________________5.Iwasreadytogotobed.Myfathercamebackfromwork.____________________________________________________IgojoggingeverymorningbeforeIhavebreakfast.AfterIpractisedplayingbasketballforhours,Ifelttiredout.While/WhenIwaswaitingatthebusstop,ImetPeter.While/WhenIwaswatchingTV,Ireceivedacallfrommyuncle.Whenmyfathercamebackfromwork,Iwasreadytogotobed.P.54Davidiswritinginhisdiaryaboutoneofhisdays.Helphimcombinehissentencesusingbefore,after,whenorwhile.GrammarB现在完成时+since+一般过去时Presentation表示“自从...以来”。从句谓语动词用一般过去时，而主句用现在完成时，且主句的动词必须是延续性动词。sincee.g.You’vebeenhappysinceIfirstmetyou.Theyhavebeenfriendssincetheywereatprimaryschool.PresentationsinceIt’s/Ithasbeen+时间段+since+时间状语从句

翻译为：自…以来，已经…(时间)了。

从句的谓语动词用一般过去时，且必须是非延续性动词。e.g.It’s/hasbeenthreemonthssincehemovedtothiscity.时间段+haspassed+since+时间状语从句翻译为：自从…以来，…（时间）已经过去了”。

从句的谓语动词用一般过去时，且必须是非延续性动词。e.g.Threemonthshaspassedsincehemovedtothiscity.since还可以引导原因状语从句，翻译为“由于；既然”，语气较弱，一般强调已知事实。e.g.Sinceyoucan’tanswerthequestion,I’llasksomeoneelse.Presentationtill&untilUntil常与延续性动词连用，表示主句动作一直持续到until表示的时间为止。e.g.Iwaiteduntilthreeo’clock,buthedidn’tcome.not…until…“直到…才…”，常与非延续性动词连用，表示主句动作直到until所表示的时间才发生。e.g.Theboydidn’tsleepuntilhisfathercameback.都表示“直到…为止”。一般情况下可互换，until更正式。until可以放在句首或句中，而till不可以用在句首。1.Ihavebeencrazyaboutplayingbasketball_____Iwasalittleboy.2.Theweatherhasbeenawfulthisweek.Theraindidnotstop_____yesterdayevening,sowecouldnotpracticebasketballforseveralyears.3.Weplayedbasketballintheplaygroundthisafternoon______itwasgettingdark.4.Itisthefirsttimewehaveplayedbasketball_____Monday.Weenjoyedourselvesverymuch.5.Iwaitedfor20minutesatthebusstop________thebusarrived.6.ItisFridayevening.Iwillnotgotobed______IfinishwatchingmyfavouriteTVprogramme.sinceuntiluntiltill/untiltill/untilsinceP.55Completethesentenceswithsince,tilloruntil.GrammarCPresentationassoonasassoonas翻译为“一…就…”。表示两个动作紧接着发生。e.g.ItbegantorainassoonasIleftthehouse.指未发生的动作，主句一般将来时，从句用一般现在时e.g.

Hewillvisityouassoonashegetsthere.

【注意】有时为了特意表达刚完成某事就如何,需用现在完成时。e.g.IwillgowithyouassoonasIhavewashedmyface.

紧接着发生的两个短动作，主从句都用一般过去时e.g.HetookouthisEnglishbooksassoonas

hesatdown.【注意】不过，也有从句和主句都用一般现在时的情况

e.g.Assoonashefinisheshisclasswork,herunsoutoftheclass.Presentationwheneverwhenever意思是“每当，任何时候，无论何时”，whenever可以用everytime,nomatterwhen替换。e.g.

Helikeslisteningtomusicwheneverhehastime.

Whenevershecomes,shebringsafriend.I’lldiscussitwithyouwheneveryoulike.1.Davidoftengoestoplaybasketball__________schoolisover.2.HewatchestheNBA_________thereisagameonTV.3._________hetalksaboutbasketball,hegetsexcited.4._________helearntthattheNBAplayerswouldcometoChina,hetriedhisbesttogetaticket.

assoonaswheneverWhenever

AssoonasP.56C1SimoniswritingaboutDavid’sloveforbasketball.HelpSimoncompletehissentenceswithassoonasorwhenever.P.56C2Davidiswritingabouthisuncle’sbasketballdream.Helphimcompletehisarticlewiththecorrectconjunctionsyouhavelearntinthisunit.Myuncledreamtofbecomingafamousbasketballplayerinhisteens.Heplayedinhisschool‘sbasketballteam______hewasastudent.Sadlymyunclehadabadaccident___________hewastraininghardforabigmatch.Hehurthiskneesbadly,andtheyneverfullygotbetter.Myunclewassosad._______hehadhisaccident,everyo