Unit4Grammar课件牛津译林版英语九年级上册

Unit4GrowingupPeriod3Grammar新课导入Lookandsay1.Assoonasyouclickthemouse,there'sagreatdealofinformation.2.Theyweresingingwhileweweredancing.3.Lilyhasstayedathomesincesheleftschool.4.Itwasalongtimebeforewemetagain.时间状语从句LanguageGoal1.能熟悉并正确运用本课时的重点单词和短语。2.能掌握before、after、when和while引导的时间状语从句。3.能掌握since、till和until引导的时间状语从句。4.能掌握assoonas和whenever引导的时间状语从句。新知学习课堂小结当堂检测学习目标重点研讨新知学习课堂小结当堂检测学习目标重点研讨AUsingbefore,after,whenandwhileWeusetheconjunctionsbefore,after,whenandwhiletointroducetimeclauses.Theycanbeplacedatthebeginningorinthemiddleofsentences.Beforemeansearlierthanacertaintime.HeremainedthereforaboutayearbeforetheNBAtooknoticeofhim.Aftermeanslaterthanacertaintime.Afterhegraduated,hewasforcedtoplayinanotherbasketballleague.新知学习课堂小结当堂检测学习目标重点研讨Tip:Beforeandaftercanalsobeusedasprepositionsoftime.before9a.m.afterlunchWhenmeansatorduringacertaintime.Whenhefinallygotthechance,hescored20pointsinhisfirstgame.Whilemeansduringacertaintime.While(hewas)attendingjuniorhigh,Spudtriedoutfortheschoolteam.新知学习课堂小结当堂检测学习目标重点研讨▲Igojoggingeverymorning.ThenIhavebreakfast.__________________________________________________.2.Ipractisedplayingbasketballforhours.Ifelttiredout.__________________________________________________.IgojoggingeverymorningbeforeIhavebreakfastAfterIpractisedplayingbasketballforhours,Ifelttiredout新知学习课堂小结当堂检测学习目标重点研讨3.ImetPeter.Iwaswaitingatthebusstop.__________________________________________________.4.IwaswatchingTV.Ireceivedacallfrommyuncle.__________________________________________________.5.Iwasreadytogotobed.Myfathercamebackfromwork.__________________________________________________.ImetPeterwhile(Iwas)waitingatthebusstopWhile(Iwas)watchingTV,IreceivedacallfrommyuncleIwasreadytogotobedwhenmyfathercamebackfromwork新知学习课堂小结当堂检测学习目标重点研讨BUsingsince,tillanduntilWealsousetheconjunctionssince,tillanduntiltointroducetimeclauses.Sincemeansfromacertaintime.Theverbinthemainclauseisoftenusedinthepresentperfecttense.You'vebeenhappysinceIfirstmetyou.Tillanduntilbothmeanuptoacertaintime,buttillismoreinformalthanuntil.Spudremainedinanotherbasketballleagueforaboutayeartill/untiltheNBAtooknoticeofhim.新知学习课堂小结当堂检测学习目标重点研讨Whenweuseverbslikego,leave,arrive,etc.inthemainclauses,weshouldusethestructurenot...till/until.Donotwakemeupuntilyoufinishyourwork.Tip:Since,tillanduntilcanalsobeusedasprepositionsoftime.since2006till/untiltoday新知学习课堂小结当堂检测学习目标重点研讨

HerearemoresentencesfromDavid'sdiaryentry.Completehissentenceswithsince,tilloruntil.▲新知学习课堂小结当堂检测学习目标重点研讨1.Ihavebeencrazyaboutplayingbasketball_____Iwasalittleboy.2.Theweatherhasbeenawfulthisweek.Theraindidnotstop________yesterdayevening,sowecouldnotpractisebasketballforseveraldays.3.Weplayedbasketballintheplaygroundthisafternoon________itwasgettingdark.4.Itisthefirsttimewehaveplayedbasketball________Monday.Weenjoyedourselvesverymuch.5.Iwaitedfor20minutesatthebusstop________thebusarrived.6.ItisFridayevening.Iwillnotgotobed_________IfinishwatchingmyfavouriteTVprogramme.sincetill/untiltill/untilsincetill/untiltill/until新知学习课堂小结当堂检测学习目标重点研讨CUsingassoonasandwheneverTheconjunctionsassoonasandwhenevercanalsointroducetimeclauses.Assoonasmeanswhensomethinghappens,orashorttimeaftersomethinghashappened.ItbegantorainassoonasIleftthehouse.Whenevermeansatanytime.IcanreadbookswheneverIwantto.Tip:Wecanuseeverytimetoreplacewhenever.新知学习课堂小结当堂检测学习目标重点研讨▲C1assoonaswheneverWheneverAssoonas新知学习课堂小结当堂检测学习目标重点研讨▲C2新知学习课堂小结当堂检测学习目标重点研讨WheneverSincewhentill/untilWhen/Before新知学习课堂小结当堂检测学习目标重点研讨LanguagePoints...hescored41pointsinagameagainsttheAtlantaHawks.……他在对阵亚特兰大鹰队的一场比赛中得了41分。againstprep.对抗，与……相反，违反e.g.OurclasswillplaybasketballagainstClass2.我们班要与二班进行篮球对抗赛。Weshouldneverdoanythingagainstthelaw.我们不应该做违法的事。新知学习课堂小结当堂检测学习目标重点研讨before、after、when和while引导的时间状语从句时间状语从句是指在复合句中充当时间状语的句子。如：Whentheweatherisgood,mygrandpalikesgoingfishing.当天气好的时候，我爷爷喜欢去钓鱼。Thesuncameoutafterthestormstopped.暴风雨停止后，太阳出来了。注意：我们可以用before、after、when和while引导时间状语从句，这些词既可放在句首，也可放在句中。新知学习课堂小结当堂检测学习目标重点研讨新知学习课堂小结当堂检测学习目标重点研讨while意思是“当……时”，强调主句动作和从句动作是同时发生的。如：

Whilemysisterwassweepingthefloor,Iwaswashingthedishes.

我姐姐扫地时，我在洗碗。

注意：while引导的从句的谓语动词必须是延续性的。while还可以表示“在……期间”，表示主句动作发生在从句动作进行的过程中。如：Whiletheboyswereplayingfootball,itrained.

当男孩子们踢足球时，下雨了。新知学习课堂小结当堂检测学习目标重点研讨注意：在when和while引导的从句中，当主句和从句的主语一致，并且从句中有be动词时，可以省略主语和be动词，构成when/while+-ing结构。如：When(sheis)introuble,shealwaysasksformyhelp.她遇到困难时总是向我求助。While(Iam)travelling,Iliketobuysomesouvenirs.旅游时我喜欢买纪念品。新知学习课堂小结当堂检测学习目标重点研讨since、till和until引导的时间状语从句since、till和until常用来引导时间状语从句，如：MrBrownhasbeeninBellingsinceyouleft.自从你离开，布朗先生就一直待在北京。Iworkedtill/untilhecameback.我一直工作到他回来为止。新知学习课堂小结当堂检测学习目标重点研讨注意：since引导的从句的谓语动词可以是延续性动词，也可以是瞬时动词。till和until意思是“到……为止”，一般情况下两者可以互换，但till不如until正式。如：Walktill/untilyouseeawhitehouse.

一直走到你看到一座白房子为止。注意：如果主句中的谓语动词是瞬时动词，该动词用否定形式，形成“not...till/until结构，意思是“直到……才（开始）”。如：Ididnotgotobedtill/until

Ifinishedmyhomework.

直到做完作业我才上床睡觉。新知学习课堂小结当堂检测学习目标重点研讨assoonas和whenever引导的时间状语从句我们常用assoonas和whenever引导时间状语从句。如：Assoonas

IarriveinCanada,Iwillcallyou.我一到加拿大，就给你打电话。Wheneverhemetus,hesmiledatus.他每次遇见我们，都向我们微笑。新知学习课堂小结当堂检测学习目标重点研讨assoonas意思是“一……就”。如：Webegantoworkassoonaswegotthere.我们一到那里就开始工作。Hewillvisityouassoonashegetsthere。他一到那里就会去拜访你。whenever意思是“每当；任何时候”。如：Helikeslisteningtomusicwheneverhehastime.每当他有时间的时候，他喜欢听音乐。注意：whenever可以用everytime替换。重点单词：career,against时间状语从句：

我们可以用before、after、when、_______、_______、till、_______、assoonas和_________来引导时间状语从句；before表示______一个特定时间，since表示从某一特定时间开始，whenever表示在___________。Unit4Period3新知学习课堂小结当堂检测学习目标重点研讨whilesinceuntilwhenever早于任何时间新知学习课堂小结当堂检测学习目标重点研讨一、根据提示完成下列句子。1.Thecharityorganizationhasdonealotofwork,__________(特别)forchildrenwithoutparents.2.Milliestartedher_________(事业)asanE