Unit12SectionA（GrammarFocus-4c）课件 人教版英语九年级

Unit12Lifeisfulloftheunexpected.SectionAGrammarFocusReviewandpreparationLookatthepicturesandtalkaboutMary’sday.overslepttookashowergottothebusstoprantoschoolleftherbackpackranbacktoschoolgotbacktoschoolclassstarted123456781.Timwentintothebathroom.Marygotup.____________________________________________________________________________2.Thecoffeebecamecold.Iputcreaminthecoffee.____________________________________________________________________________

4aMakesentencesusingbythetimeorbefore.BythetimeMarygotup,Timhadalreadygoneintothebathroom.BeforeIputcreaminthecoffee,thecoffeehadbecomecold.Theteachercollectedthemathhomework.Igottoschool.________________________________________________________________________________Icompletedtheworkformyboss.Theworkdayended.________________________________________________________________________________

BythetimeIgottoschool,theteacherhadcollectedthemathhomework.Bythetimetheworkdayended,Ihadcompletedtheworkformyboss.Themoviestarted.Iarrivedatthecinema.______________________________________________________________________________Mymotherfinishedmakingtheapplepie.Igothomefrommylanguagecourse.____________________________________________________________________________________________________________________BythetimeIarrivedatthecinema,themoviehadstarted.BythetimeIgothomefrommylanguagecourse,mymotherhadfinishedmakingtheapplepie.BythetimeIarrivedattheparty,everyoneelse_______already_________.2.Whenheputthenoodlesintoabowl,herealizedhe_____________toaddthegreenbeans.4bFillintheblankswiththecorrectformsofthewordsinthebox.rushoutforgetarriveatgointoshowupfindouthadshownuphadforgottenBythetimemymothercamebackfromthemarket,Ialready______________thedoortogoformypianolesson.4.Beforeshegottotheairport,she_____________abouttheearthquake.5.Whenshe__________themovietheater,sherememberedshehadforgottentofeedherdog.6.Beforeshegotachancetosaygoodbye,he____________thebuilding.hadrushedouthadforgottenarrivedathadgoneintoBythetimeIleftforschoolinthemorning,_______________________________________Bytheendoftheschoolday,______________________________________3.Bydinnertime,I_____________________________________4cWritetwotruestatementsandonefalsestatementaboutyourdayyesterday.Thenaskyourclassmatestoguessthefalsestatement.GrammarFocusWhenIgottoschool,IrealizedthatIhadleftmybackpackathome.BythetimeIgottoschool,thebellhadrung.BeforeIgottothebusstop,thebushadalreadyleft.IwasabouttogouptomyofficewhenIdecidedtogetacoffeefirst.AsIwaswaitinginlinewiththeotherofficeworkers,Iheardaloudsound.

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”。表示发生在过去的动作对过去的某一点造成的某种影响或结果，用来指定在另一个过去行动之前就已经完成了的一个事件。过去完成时Finishthetask1.过去完成时的构成：_____+___________2.过去完成时表示：

____________________________________________________________________3.过去完成时常与______________________等引导的时间状语连用。had过去分词when,before,bythetime过去某一时刻或动作之前已经发生或完成的动作。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_____________.WhenhadleftBythetimehadrungGrammarFocus3)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.gottohadalreadyleftwasaboutto5)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______________________.waswaitinginlineheardaloudsound◆WhenIgottoschool,IrealizedthatIhad leftmybackpackathome.◆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。◆Iwasabouttogouptomyoffice

whenIdecidedtogetacoffeefirst.◆AsIwaswaitinginlinewiththeotherofficeworkers,Iheardaloudsound.beabouttodo,bedoing等表示即将或正在做某事时，常用when引导从句表示突然发生的动作。【实战演练】

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

he

arrived

here.

hadgonehadstartedhadlearnthadcleanedbythetime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。如果从句中的谓语动词是一般过去式，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，那么从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。（1）bytheendof+时间点意为“到……结束时”

①+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。

②+将来的时间点，主句用将来完成时；拓展例：Bytheendofnextmonth,Iwillhavefinishedmynewbook.到下个月结束时我将要完成我的新书。(2)by+时间点意为“到……为止；截止……时”

①+现在的时间点，主句用现在完成时；例：Bynow,Ihavefinishedallmyhomework.

截止现在，我已经完成了所有的作业。

②+过去的时间点，主句用过去完成时；例：Byyesterday,thebuildinghadbeencompleted.截止昨天，这个建筑就已经完成了。③+将来的时间点，主句用将来完成时。例：Bytomorrow,allthestudentswillhavebeenoutoftheschool.到明天所有的学生都将离校。一、根据句意及汉语提示完成单词。1.Pleaseputsome_________(奶油)onthebread.2.Weneedfourbananastomakebanana_________(果馅饼).3.Cocoa_________(豆)areusedtomakesomekindsofdrink.4.Wouldyouliketogotothe_________(集市)tobuysomefoodwithme?5.Myfatherdoesn’tallowmetoplaycomputergameson_________(工作日).creampiesbeansmarketweekdays二、根据句意，用括号中所给单词的适当形式填空。1．Alicesaidshe____

____(notfind)hernewpenyet.2．WhenBobarrivedhome，herealizedsomeone______

__(break)intohishouse.3．Myfriends________(take)manyphotosbeforeIgottoschool.4．Ibeganwatchinghereanhourago，buttillnownothing____

____(happen)．5．Bythetimehegottothecinema，thefilm

_

_______(beon)fortenminutes.hadn'tfoundhadbrokenhadtakenhadbeenonhashappened三、单项选择。1．Mostofmygoodfriends________whenI________attheparty.A．left；hadarrived

B．hadleft；arrivedC．left；arrived D．hadleft；hadarrived2．—Youdidn'twatchthemovie?—Yes，butbythetimeI________tothecinema，themovie________forseveralminutes.A．got；hasbegun B．got；hadbeenonC．got；hadbegunD．got；hasbeenon3．________lastmonth，Ihadplantedsixtrees.A．Bytheendof B．AttheendofC．Intheend D．TotheendBBA4．—Whywashelateforschoolyesterday?—Heoverslept.Bythetime