人教版九年级英语全册Unit12Section-A-Grammar-focus-4c-课件

人教新目标版九年级（全）Unit12Kifeisfulloftheunexpected.Period3SectionAGrammarfocus-4c阅读课优质课PresentationLearningaims1.学习本课新词汇:cream，workday，showup,bean,market,bytheendof2.掌握句型：BythetimeIarrivedattheparty,everyoneelsehadalreadyshownup.Whenshearrivedatthemovietheater,sherememberedshehadforgottentofeedherdog.3.

通过翻译Grammarfocus

中的句子，完成句子，探究过去完成时的概念，用法和结构。4.通过控制性练习(4a)和自由练习(4b，4c)，能正确使用过去完成时。PresentationNewwordsPre-grammarLookandsay.creamn.

奶油；乳脂workdayn.

工作日showup赶到；露面beann.豆；豆荚marketn.

市场；集市bytheendof在(某时间点)以前PresentationRevisionPre-grammarLookandsay.Whathappenedtoher?When

shegottoschool,sherealized

thatshehadleftherbackpackathome.Bythetimeshegotup,herbrother

had

already

gottenintheshower.Bythetimeshegotoutside,thebushad

already

left.9Bythetimeshewalkedintoclass,theteacherhadstartedteachingalready.PresentationWarmingupPre-grammarLookandsay.Haveyoueverbeenlateforschool?Thebellrang.8:00A.MShegottoschool.8:15A.MpresentBythetime_______________,thebell_________.she

got

toschoolhadrung8:22A.M.8:20A.MpresentTheteacherstartedteachingalready.Shegotintotheclassroom.Whenshe___________________,

theteacher__________________already.gotintotheclassroomhadstartedteachingPresentationWhile-grammarReadandtranslate.Readthesentencesandtranslatethem.GrammarFocusWhenIgottoschool,IrealizedthatIhadleftmybackpackathome.BythetimeIgottoschool,thebellhadrung.BeforeIgottothebusstop,thebushadalreadyleft.Iwasabout

togouptomyofficewhenIdecidedtogetacoffeefirst.AsIwaswaitinginlinewiththeotherofficeworkers,Iheardaloudsound.PresentationPracticePre-grammarLookandfill.Fillintheblanksaccordingtogrammarfocus.1)当我到达学校的时候，我才意识到我把书包忘在家里了。

______Igottoschool,IrealizedthatI__________mybackpackathome.2)到我返回学校的时候，铃声已经响过了。

___________Igotbacktoschool,thebell_____________.3)我到达公共汽车站之前，汽车已经离开了。

BeforeI__________thebusstop,thebus____________________.4)我决定先买一杯咖啡，然后再去办公室。

I_______________gouptomyofficewhenIdecidedtogetacoffeefirst.5)就在我和别的工作人员一起排队等候的时候，听到了一个巨大的声响。AsI________________withtheotherofficeworkers,I______________.WhenhadleftBythetimehadrunggottohadalreadyleftwasabouttowaswaitinginlineheardaloudsoundPresentationPre-grammarGrammarFocusWhatdidyoufindout?探究语法规律探究一：过去完成时的结构和用法过去完成时表示过去某一时间或动作以前已经发生或完成了的动作。它表示动作发生的时间是“过去的过去”。

过去完成时的构成：_____+___________had过去分词过去完成时常与________________________等引导的时间状语连用。when,before,bythetimeWhenIgottoschool,IrealizedthatIhadleftmybackpackathome.BythetimeIgottoschool,thebellhadrung.BeforeIgottothebusstop,thebushadalreadyleft.Iwasabout

togouptomyofficewhenIdecidedtogetacoffeefirst.AsIwaswaitinginlinewiththeotherofficeworkers,Iheardaloudsound.PresentationPre-grammar探究语法规律探究一：过去完成时的结构和用法

图解语法nowThebellrang.8:00AM8:15AMBythetime_______________,thebell_________.

hadrungMarygottoschool.参照点过去完成时以一个过去的时间点为参照，表示该动作发生在“过去的过去”。Marygottoschool.GrammarFocusPresentationPre-grammarGrammarFocus探究语法规律探究一：过去完成时的结构和用法

图解语法nowTheteacherstartedteachingintheclassroom.8:20AM8:22AMWhen______________________,______________________________________.

theteacherhadstartedteachingintheclassroomShegotintotheclassroom.过去完成时以一个过去的时间点为参照，表示该动作发生在“过去的过去”。参照点PresentationPre-grammarGrammarFocus探究语法规律nowThebusleft.5:20PM5:21AMBefore___________________________,_____________________.

thebushadalreadyleft

Shearrivedatthebusstop.过去完成时以一个过去的时间点为参照，表示该动作发生在“过去的过去”。参照点探究一：过去完成时的结构和用法

图解语法PresentationPre-grammarGrammarFocus探究语法规律探究一：过去完成时的结构和用法

图解语法Makesentenceswith

Bythetime…orWhen…

6:30

6:40

nowthepolicemangettotheshopTomrunawayBythetime\Whenthepolicemangottotheshop,Tomhadrunaway.PresentationPre-grammarGrammarFocus探究语法规律探究一：过去完成时的结构和用法

图解语法Makesentenceswith

Bythetime…orWhen…LiuMeiwakeup

theconcert

beover

6:30

6:40

nowBythetime\WhenLiuMeiwokeup,theconcerthadbeenover.PresentationPre-grammarGrammarFocus探究语法规律探究一：过去完成时的结构和用法◆WhenIgottoschool,IrealizedthatIhadleftmybackpackathome.◆BythetimeIgotbacktoschool,thebell hadrung.◆BeforeIgottothebusstop,thebushad alreadyleft.由when,bythetime,before等引导时间状语从句时，若描述发生在过去的事，主句常用过去完成时(had+过去分词)表示动作发生在过去的过去。

参照物---时间状语从句PresentationPre-grammarGrammarFocus探究语法规律探究一：过去完成时的结构和用法by的用法by+时间点“到……为止；截止……时”by+现在时间，句子时态用现在完成时Bynow,Ihavefinishedallmyhomework.截止现在，我已经完成了所有的作业。by+过去时间，句子时态用过去完成时Bynineo’clocklastnight,wehadgot200picturesfromthespaceship.到昨晚9点钟，我们已经收到200张飞船发来的图片。by+将来时间，句子时态用将来完成时BynextFriday,WewillhavefinishedUnit5.到下周五结束时，我们将要学完第五单元。PresentationPre-grammarGrammarFocus探究语法规律探究一：过去完成时的结构和用法bythetime的用法bythetime

意为“到……时候(为止)”,是一个介词短语,在句中常起到连词的作用,引导时间状语从句。1.如果从句中的谓语动词是一般过去时,那么主句的谓语动词通常用过去完成时,表示“截止到从句动作发生时,主句动作已经完成,即过去的过去”。例：Bythetimeyoucameback,Ihadfinishedthisbook.你回来时我已经把这本书看完了。（从句谓语动词cameback为一般过去时,所以主句动作用过去完成时hadfinished,表示过去的过去。）2.如果从句中的谓语动词为一般现在时或现在完成时,那么主句中的谓语动词常用将来完成时,表示“截止到将来的某一时刻为止,主句动作将已完成”。例：BythetimeIgethome,theywillhaveleft.我到家时他们将已经离开。BythetimeIgraduatenextyear,Iwillhavelivedhereforfiveyears.到明年毕业时,我将已经在这待了五年了。PresentationPre-grammarGrammarFocus探究语法规律探究一：过去完成时的结构和用法bytheendof+时间点意为“到……结束时”bytheendof+过去的时间点，主句用过去完成时；例：Bytheendoflastyear,IhadstayedinXi’anforsevenyears.

到去年结束时，我已经在西安待了7年了。Bytheendof

lastweek,theyhadcompletedthebridge.

bytheendof…的用法bytheendof+将来的时间点，主句用将来完成时；Bytheendofnextmonth,Iwillhavefinishedmynewbook.到下个月结束时我将要完成我的新书。PresentationPre-grammarGrammarFocus探究语法规律探究一：过去完成时的结构和用法过去完成时还可表示过去某一时刻之前发生的动作或状态持续到过去某个时间或持续下去，常与for,since等词连用。例:WhenJackarrived,Maryhadbeenawayforalmostanhour.当杰克到时，玛丽已经离开快一个小时了。MygrandmotherhadbeendeadsinceNovemberlastyear.用所给词的适当形式填空。

1.

When

I

got

there

the

bus

_________

(go).

2.

By

the

time

I

got

to

class,

the

teacher___________(start)

teaching.

3.

We

_____________

(learn)

over

1,000

words

bytheend

of

last

term.4.

I

___________

(clean)

the

room

before

hearrived

here.

【实战演练】hadgonehadstartedhadlearnthadcleanedPresentationPre-grammarGrammarFocus探究语法规律探究二：一般过去时、现在完成时与过去完成时之间区别1.一般过去时表示在过去某时发生的动作或存在的状态。5yearsago

now2.现在完成时表示的动作发生在过去，但侧重对现在产生的结果或造成的影响，与现在有关。其结构为：“助动词have（has）+过去分词”。例：WehavelearnedEnglishfor5years.

5yearsagohavelearnednow例：WestartedtolearnEnglish5yearsago.

我们五年前开始学英语。我们已经学了五年的英语了。Presentatione.g.Wehavelearned1,000Englishwordssofar.Wehadlearned1,000Englishwordsbythen.Pre-grammarGrammarFocus探究语法规律探究二：一般过去时、现在完成时与过去完成时之间区别3.

过去完成时表示在过去某个时间或动作之前已经发生或完成了的动作或存在的状态，即“过去的过去（past-in-the-past）”。例：Wehadlearned

Englishfor4yearsbylastyear.

到去年为止，我们已经学英语四年了。

bylastyearnowbegantolearnfor4yearsPresentationPre-grammarGrammarFocus探究语法规律Whatdidyoufindout?WhenIgottoschool,IrealizedthatIhadleftmybackpackathome.BythetimeIgottoschool,thebellhadrung.BeforeIgottothebusstop,thebushadalreadyleft.Iwasabout

togouptomyofficewhenIdecidedtogetacoffeefirst.AsIwaswaitinginlinewiththeotherofficeworkers,Iheardaloudsound.探究三：beabouttodosth.的用法1)表示即将发生的动作，在时间上指最近的将来。如:Weareabouttostart.我们就要出发了。Thenewschoolyearisabouttobegin.新学年开学在即。2)在含有beabouttodo的句子中，不能再加时间状语。如:Wrong:ThemedicalteamisabouttostartimmediatelyRight:Themedicalteamisabouttostart.医疗队就要出发了。PresentationPost-grammarPracticeMakesentencesusingbythetimeorbefore.BeforeIputcreaminthecoffee,thecoffeehadbecomecold.BythetimeIgottoschool,theteacherhadcollectedthemathhomework.Ihadcompletedtheworkformybossbeforetheworkdayended.ThemoviehadstartedbeforeIarrivedatthecinema.BythetimeIgothomefrommylanguagecourse,mymotherhadfinishedmakingtheapplepie.4aPresentationPost-grammarPracticeFillintheblankswiththecorrectformsofthewordsinthebox.露面shownuphadhadforgottenn.豆n.市场hadrushedouthadfoundoutarrivedathadgoneinto4bPresentationPost-grammarPracticeWritetwotruestatementsandonefalsestatementaboutyourdayyesterday.Thenaskyourclassmatestoguessthefalsestatement.Ihadalreadyhadbreakfast.Ihadfinishedmyhomework.hadhadtoomuchfruit.动身去在……以前4cPresentationPost-grammarClasstest一、用所给单词的适当形式填空1.他说他以前见过你。Hesaidthathe______________(see)youbefore.hadseen2.当我进来时，他已做完了作业。Whe