Unit12Lifeisfulloftheunexpected.SectionAGrammarFocusReviewandpreparationLookatthepicturesandtalkaboutMary’sday.overslepttookashowergottothebusstoprantoschoolleftherbackpackranbacktoschoolgotbacktoschoolclassstarted123456781.Timwentintothebathroom.Marygotup.____________________________________________________________________________2.Theco?eebecamecold.Iputcreamintheco?ee.____________________________________________________________________________

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.

表示過去某一時間或動作以前已經發生或完成了的動作。它表示動作發生的時間是“過去的過去”。表示發生在過去的動作對過去的某一點造成的某種影響或結果，用來指定在另一個過去行動之前就已經完成了的一個事件。過去完成時Finishthetask1.過去完成時的構成：_____+___________2.過去完成時表示：

____________________________________________________________________3.過去完成時常與______________________等引導的時間狀語連用。had過去分詞when,before,bythetime過去某一時刻或動作之前已經發生或完成的動作。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，鈴聲已經響過了。

_______________Igotbacktoschool,thebell_____________.WhenhadleftBythetimehadrungGrammarFocus3)我到達公共汽車站之前，汽車已經離開了。

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

I__________________gouptomyofficewhenIdecidedtogetacoffeefirst.gottohadalreadyleftwasaboutto5)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______________________.waswaitinginlineheardaloudsound◆WhenIgottoschool,IrealizedthatIhad leftmybackpackathome.◆BythetimeIgotbacktoschool,thebell hadrung.◆BeforeIgottothebusstop,thebushad alreadyleft.由when,bythetime,before等引導時間狀語從句時，若描述發生在過去的事，主句常用過去完成時(had+過去分詞)表示動作發生在過去的過去?！鬒wasabouttogouptomyoffice

whenIdecidedtogetacoffeefirst.◆AsIwaswaitinginlinewiththeotherofficeworkers,Iheardaloudsound.beabouttodo,bedoing等表示即將或正在做某事時，常用when引導從句表示突然發生的動作。【實戰演練】

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

he

arrived

here.

hadgonehadstartedhadlearnthadcleanedbythetime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。如果從句中的謂語動詞是一般過去式，那么主句的謂語動詞通常用過去完成時，表示“截止到從句動作發生時，主句動作已經完成，即過去的過去”。例：Bythetimeyoucameback,Ihadfinishedthisbook.你回來時我已經把這本書看完了。（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在時或現在完成時，那么從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?！崩築ythetimeIgethome,theywillhaveleft.我到家時他們將已經離開。

BythetimeIgraduatenextyear,Iwillhavelivedhereforfiveyears.到明年畢業時，我將已經在這待了五年了。（1）bytheendof+時間點意為“到……結束時”

①+過去的時間點，主句用過去完成時；例：Bytheendoflastyear,IhadstayedinXi’anforsevenyears.到去年結束時，我已經在西安待了7年了。

②+將來的時間點，主句用將來完成時；拓展例：Bytheendofnextmonth,Iwillhavefinishedmynewbook.到下個月結束時我將要完成我的新書。(2)by+時間點意為“到……為止；截止……時”

①+現在的時間點，主句用現在完成時；例：Bynow,Ihavefinishedallmyhomework.

截止現在，我已經完成了所有的作業。

②+過去的時間點，主句用過去完成時；例：Byyesterday,thebuildinghadbeencompleted.截止昨天，這個建筑就已經完成了。③+將來的時間點，主句用將來完成時。例：Bytomorrow,allthestudentswillhavebeenoutoftheschool.到明天所有的學生都將離校。一、根據句意及漢語提示完成單詞。1.Pleaseputsome_________(奶油)onthebread.2.Weneedfourbananastomakebanana_________(果餡餅).3.Cocoa_________(豆)areusedtomakesomekindsofdrink.4.Wouldyouliketogotothe_________(集市)tobuysomefoodwithme?5.Myfatherdoesn’tallowmetoplaycomputergameson_________(工作日).creampiesbeansmarketweekdays二、根據句意，用括號中所給單詞的適當形式填空。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、單項選擇。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