人教版九年級英語全冊Unit12Section-A-Grammar-focus-4c-課件

人教新目標版九年級（全）Unit12Kifeisfulloftheunexpected.Period3SectionAGrammarfocus-4c閱讀課優(yōu)質(zhì)課PresentationLearningaims1.學習本課新詞匯:cream，workday，showup,bean,market,bytheendof2.掌握句型：BythetimeIarrivedattheparty,everyoneelsehadalreadyshownup.Whenshearrivedatthemovietheater,sherememberedshehadforgottentofeedherdog.3.

通過翻譯Grammarfocus

中的句子，完成句子，探究過去完成時的概念，用法和結(jié)構(gòu)。4.通過控制性練習(4a)和自由練習(4b，4c)，能正確使用過去完成時。PresentationNewwordsPre-grammarLookandsay.creamn.

奶油；乳脂workdayn.

工作日showup趕到；露面beann.豆；豆莢marketn.

市場；集市bytheendof在(某時間點)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)當我到達學校的時候，我才意識到我把書包忘在家里了。

______Igottoschool,IrealizedthatI__________mybackpackathome.2)到我返回學校的時候，鈴聲已經(jīng)響過了。

___________Igotbacktoschool,thebell_____________.3)我到達公共汽車站之前，汽車已經(jīng)離開了。

BeforeI__________thebusstop,thebus____________________.4)我決定先買一杯咖啡，然后再去辦公室。

I_______________gouptomyofficewhenIdecidedtogetacoffeefirst.5)就在我和別的工作人員一起排隊等候的時候，聽到了一個巨大的聲響。AsI________________withtheotherofficeworkers,I______________.WhenhadleftBythetimehadrunggottohadalreadyleftwasabouttowaswaitinginlineheardaloudsoundPresentationPre-grammarGrammarFocusWhatdidyoufindout?探究語法規(guī)律探究一：過去完成時的結(jié)構(gòu)和用法過去完成時表示過去某一時間或動作以前已經(jīng)發(fā)生或完成了的動作。它表示動作發(fā)生的時間是“過去的過去”。

過去完成時的構(gòu)成：_____+___________had過去分詞過去完成時常與________________________等引導的時間狀語連用。when,before,bythetimeWhenIgottoschool,IrealizedthatIhadleftmybackpackathome.BythetimeIgottoschool,thebellhadrung.BeforeIgottothebusstop,thebushadalreadyleft.Iwasabout

togouptomyofficewhenIdecidedtogetacoffeefirst.AsIwaswaitinginlinewiththeotherofficeworkers,Iheardaloudsound.PresentationPre-grammar探究語法規(guī)律探究一：過去完成時的結(jié)構(gòu)和用法

圖解語法nowThebellrang.8:00AM8:15AMBythetime_______________,thebell_________.

hadrungMarygottoschool.參照點過去完成時以一個過去的時間點為參照，表示該動作發(fā)生在“過去的過去”。Marygottoschool.GrammarFocusPresentationPre-grammarGrammarFocus探究語法規(guī)律探究一：過去完成時的結(jié)構(gòu)和用法

圖解語法nowTheteacherstartedteachingintheclassroom.8:20AM8:22AMWhen______________________,______________________________________.

theteacherhadstartedteachingintheclassroomShegotintotheclassroom.過去完成時以一個過去的時間點為參照，表示該動作發(fā)生在“過去的過去”。參照點PresentationPre-grammarGrammarFocus探究語法規(guī)律nowThebusleft.5:20PM5:21AMBefore___________________________,_____________________.

thebushadalreadyleft

Shearrivedatthebusstop.過去完成時以一個過去的時間點為參照，表示該動作發(fā)生在“過去的過去”。參照點探究一：過去完成時的結(jié)構(gòu)和用法

圖解語法PresentationPre-grammarGrammarFocus探究語法規(guī)律探究一：過去完成時的結(jié)構(gòu)和用法

圖解語法Makesentenceswith

Bythetime…orWhen…

6:30

6:40

nowthepolicemangettotheshopTomrunawayBythetime\Whenthepolicemangottotheshop,Tomhadrunaway.PresentationPre-grammarGrammarFocus探究語法規(guī)律探究一：過去完成時的結(jié)構(gòu)和用法

圖解語法Makesentenceswith

Bythetime…orWhen…LiuMeiwakeup

theconcert

beover

6:30

6:40

nowBythetime\WhenLiuMeiwokeup,theconcerthadbeenover.PresentationPre-grammarGrammarFocus探究語法規(guī)律探究一：過去完成時的結(jié)構(gòu)和用法◆WhenIgottoschool,IrealizedthatIhadleftmybackpackathome.◆BythetimeIgotbacktoschool,thebell hadrung.◆BeforeIgottothebusstop,thebushad alreadyleft.由when,bythetime,before等引導時間狀語從句時，若描述發(fā)生在過去的事，主句常用過去完成時(had+過去分詞)表示動作發(fā)生在過去的過去。

參照物---時間狀語從句PresentationPre-grammarGrammarFocus探究語法規(guī)律探究一：過去完成時的結(jié)構(gòu)和用法by的用法by+時間點“到……為止；截止……時”by+現(xiàn)在時間，句子時態(tài)用現(xiàn)在完成時Bynow,Ihavefinishedallmyhomework.截止現(xiàn)在，我已經(jīng)完成了所有的作業(yè)。by+過去時間，句子時態(tài)用過去完成時Bynineo’clocklastnight,wehadgot200picturesfromthespaceship.到昨晚9點鐘，我們已經(jīng)收到200張飛船發(fā)來的圖片。by+將來時間，句子時態(tài)用將來完成時BynextFriday,WewillhavefinishedUnit5.到下周五結(jié)束時，我們將要學完第五單元。PresentationPre-grammarGrammarFocus探究語法規(guī)律探究一：過去完成時的結(jié)構(gòu)和用法bythetime的用法bythetime

意為“到……時候(為止)”,是一個介詞短語,在句中常起到連詞的作用,引導時間狀語從句。1.如果從句中的謂語動詞是一般過去時,那么主句的謂語動詞通常用過去完成時,表示“截止到從句動作發(fā)生時,主句動作已經(jīng)完成,即過去的過去”。例：Bythetimeyoucameback,Ihadfinishedthisbook.你回來時我已經(jīng)把這本書看完了。（從句謂語動詞cameback為一般過去時,所以主句動作用過去完成時hadfinished,表示過去的過去。）2.如果從句中的謂語動詞為一般現(xiàn)在時或現(xiàn)在完成時,那么主句中的謂語動詞常用將來完成時,表示“截止到將來的某一時刻為止,主句動作將已完成”。例：BythetimeIgethome,theywillhaveleft.我到家時他們將已經(jīng)離開。BythetimeIgraduatenextyear,Iwillhavelivedhereforfiveyears.到明年畢業(yè)時,我將已經(jīng)在這待了五年了。PresentationPre-grammarGrammarFocus探究語法規(guī)律探究一：過去完成時的結(jié)構(gòu)和用法bytheendof+時間點意為“到……結(jié)束時”bytheendof+過去的時間點，主句用過去完成時；例：Bytheendoflastyear,IhadstayedinXi’anforsevenyears.

到去年結(jié)束時，我已經(jīng)在西安待了7年了。Bytheendof

lastweek,theyhadcompletedthebridge.

bytheendof…的用法bytheendof+將來的時間點，主句用將來完成時；Bytheendofnextmonth,Iwillhavefinishedmynewbook.到下個月結(jié)束時我將要完成我的新書。PresentationPre-grammarGrammarFocus探究語法規(guī)律探究一：過去完成時的結(jié)構(gòu)和用法過去完成時還可表示過去某一時刻之前發(fā)生的動作或狀態(tài)持續(xù)到過去某個時間或持續(xù)下去，常與for,since等詞連用。例:WhenJackarrived,Maryhadbeenawayforalmostanhour.當杰克到時，瑪麗已經(jīng)離開快一個小時了。MygrandmotherhadbeendeadsinceNovemberlastyear.用所給詞的適當形式填空。

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.

【實戰(zhàn)演練】hadgonehadstartedhadlearnthadcleanedPresentationPre-grammarGrammarFocus探究語法規(guī)律探究二：一般過去時、現(xiàn)在完成時與過去完成時之間區(qū)別1.一般過去時表示在過去某時發(fā)生的動作或存在的狀態(tài)。5yearsago

now2.現(xiàn)在完成時表示的動作發(fā)生在過去，但側(cè)重對現(xiàn)在產(chǎn)生的結(jié)果或造成的影響，與現(xiàn)在有關。其結(jié)構(gòu)為：“助動詞have（has）+過去分詞”。例：WehavelearnedEnglishfor5years.

5yearsagohavelearnednow例：WestartedtolearnEnglish5yearsago.

我們五年前開始學英語。我們已經(jīng)學了五年的英語了。Presentatione.g.Wehavelearned1,000Englishwordssofar.Wehadlearned1,000Englishwordsbythen.Pre-grammarGrammarFocus探究語法規(guī)律探究二：一般過去時、現(xiàn)在完成時與過去完成時之間區(qū)別3.

過去完成時表示在過去某個時間或動作之前已經(jīng)發(fā)生或完成了的動作或存在的狀態(tài)，即“過去的過去（past-in-the-past）”。例：Wehadlearned

Englishfor4yearsbylastyear.

到去年為止，我們已經(jīng)學英語四年了。

bylastyearnowbegantolearnfor4yearsPresentationPre-grammarGrammarFocus探究語法規(guī)律Whatdidyoufindout?WhenIgottoschool,IrealizedthatIhadleftmybackpackathome.BythetimeIgottoschool,thebellhadrung.BeforeIgottothebusstop,thebushadalreadyleft.Iwasabout

togouptomyofficewhenIdecidedtogetacoffeefirst.AsIwaswaitinginlinewiththeotherofficeworkers,Iheardaloudsound.探究三：beabouttodosth.的用法1)表示即將發(fā)生的動作，在時間上指最近的將來。如:Weareabouttostart.我們就要出發(fā)了。Thenewschoolyearisabouttobegin.新學年開學在即。2)在含有beabouttodo的句子中，不能再加時間狀語。如:Wrong:ThemedicalteamisabouttostartimmediatelyRight:Themedicalteamisabouttostart.醫(yī)療隊就要出發(fā)了。PresentationPost-grammarPracticeMakesentencesusingbythetimeorbefore.BeforeIputcreaminthecoffee,thecoffeehadbecomecold.BythetimeIgottoschool,theteacherhadcollectedthemathhomework.Ihadcompletedtheworkformybossbeforetheworkdayended.ThemoviehadstartedbeforeIarrivedatthecinema.BythetimeIgothomefrommylanguagecourse,mymotherhadfinishedmakingtheapplepie.4aPresentationPost-grammarPracticeFillintheblankswiththecorrectformsofthewordsinthebox.露面shownuphadhadforgottenn.豆n.市場hadrushedouthadfoundoutarrivedathadgoneinto4bPresentationPost-grammarPracticeWritetwotruestatementsandonefalsestatementaboutyourdayyesterday.Thenaskyourclassmatestoguessthefalsestatement.Ihadalreadyhadbreakfast.Ihadfinishedmyhomework.hadhadtoomuchfruit.動身去在……以前4cPresentationPost-grammarClasstest一、用所給單詞的適當形式填空1.他說他以前見過你。Hesaidthathe______________(see)youbefore.hadseen2.當我進來時，他已做完了作業(yè)。Whe