人教新目标(Go for it)版九年级全册Unit 13 We are trying to save the earth-Section A 3课件(共29张PPT)

第第页人教新目标(Goforit)版九年级全册Unit13Wearetryingtosavetheearth-SectionA3课件(共29张PPT)(共29张PPT)

九年级英语下册（RJ）教学课件

SectionA

GrammarFocus-4c

Unit13

Wearetryingtosavetheearth.

Revision

不同种类的污染

2.河底

3.把垃圾扔到河里

4.在……中起作用

differentkindsofpollution

thebottleoftheriver

throwrubbishintotheriver

playapartin

I.Checkifyouknowthesephrases.

5.在中国南部

6.对……有害

7.在……顶部

8.海洋生态系统

insouthernChina

beharmfulto

atthetopof

theocean’secosystem

II.Translatethesentences.

1.甚至是河底都满是垃圾。

2.这个方法不仅残酷还对环境有害。

Eventhebottomoftheriverwasfullofrubbish.

Thismethodisnotonlycruel,butalsoharmfultotheenvironment.

3.鲨鱼处于海洋食物链的顶部。

4.许多人相信鱼翅对健康有好处。

Sharksareatthetopofthefoodchainintheocean’secosystem.

Alotofpeoplebelievethatshark’sfinsaregoodforhealth.

GrammarFocus

Payattentiontothesentences.

1.We’retryingtosavetheearth.

2.Theriverusedtobesoclean.

3.Theairisbadlypolluted.

4.Noscientificstudieshaveshownthatsharkfinsaregoodforhealth.

5.Weshouldhelpsavethesharks.

Presentprogressive

usedto

Passivevoice

Presentperfect

Modalverbs

现在进行时:PresentProgressive

结构:be(am/is/are)+v.-ing

标志词：Look,Listen,now,rightnow…

e.g.Look!Theboyiscrying.

定义：表示说话时(瞬间)正在进行的动作,也表示目前或现阶段正在进行的动作。

1.

Exercises

Whatafinedaytoday!

Look!Whataretheydoing

usedtodosth.表示过去常常做某事,而现

在往往不做了,后接动词原

形。

beusedtodoingsth.表示习惯于做某事

e.g.Iusedtogetupatsixo’clock.

Joeisusedtodrinkingacupofcoffeeeverymorning.

usedtodo与beusedtodoing

2.

Exercises

Translation.

1.她过去常常周末和朋友闲逛。

Sheusedtohangoutwithfriendsonweekends.

2.他习惯于每天晚上睡得很晚。

Heisusedtostayingup.

被动语态：Passivevoice

定义：表示主语是动作的承受者，即行

为动作的对象的一种语态。

结构：be+过去分词

e.g.Anewschoolwasbuiltlastyear.

Ourclassroomiscleanedeveryday.

3.

Exercises

TranslatethesentencesbyusingPassivevoice.

1.刚才一些老年人参观了博物馆。

2.工人们使用不同种类的机器工作。

Themuseumwasvisitedbysomeoldpeoplejustnow.

Differentkindsofmachinesareusedtoworkbytheworkers.

结构:has/have+过去分词

标志词：already,yet,ever,never,since,

for…

e.g.Ihaven’tfinishedmyhomeworkyet.

定义：表示动作已经完成,但对现在造成影

响;或者表示从过去某一时间开始一

直延续到现在并还可能持续下去的

动作。

现在完成时:PresentPerfect

Completethefollowingsentences.

I_________(be)inBeijingfortwoyears.

2.I_____never_____(hear)ofthat

manbefore.

3.Tom__________(work)theresince

twoyearsago.

havebeen

have

heard

hasworked

Exercises

4.Thetwins___________(wash)theclothesforanhour.

5.He_________(play)basketballsincethreeyearsago.

6.Howlong____Sally_____(sing)yet

havewashed

hasplayed

has

sung

1.情态动词本身有一定的词义,表示说话人的情绪、态度或语气,但不能单独作谓语,只能与其他动词构成谓语。常见的有:can(could),may(might),must,need,shall(should),will(would)等。

情态动词

4.

2.情态动词无人称和数的变化,后接动词原形。否定式是在情态动词后面加not。个别情态动词有过去式形式,可用来表达更加客气、委婉的语气。

e.g.Kencanclimbupthetresslikea

koala.

Tracycouldrideabicyclewhen

shewasfiveyearsold.

Youmustn’tplaywithfire.Itis

dangerous.

Exercises

Translation.

1.我们不能在教室里吃东西。

2.首先你必须完成作业。

3.他现在不可能在家。

4.她一定知道这个问题的答案。

Wecan’teatintheclassroom.

Youmustfinishyourhomeworkfirst.

Hecan’tbeathomenow.

Shemustknowtheanswertothisquestion.

4a

Fillintheblankswiththecorrectformsoftheverbsinbrackets.

Joe:_____youever______(take)partin

anenvironmentalproject

Eric:Yes,Ihave.I______(help)witha

Clean-UpDaylastyear.Itwas

__________(consider)thebiggest

clean-upprojectthiscity____ever

____(have).

Have

taken

helped

considered

had

had

参加

Joe:Howmanypeople____(take)part

Eric:I_____(think)morethan1,000

people______(come)tohelpout.

Joe:That’sfantastic!Iguesseveryonein

thiscityis______(try)toimprove

theenvironment.

Eric:Yes,wecan’taffordto____(wait)

anylongertotakeaction!

took

think

came

trying

wait

v.承担得起(后果);买得起

4b

Fillintheblankswiththeappropriate

modalverbsfromthebox.

People__________thinkthatbigthings

______bedonetosavetheearth.Many

forgetthatsavingtheearthbeginswith

smallthings.Forexample,you____save

may/might

must

can

canwouldcould

havetoshouldmust

may/might

electricitybyturningoffthelightswhen

youleavearoom.You______alsouse

reusablebagsinsteadofplasticbags.Ithinkit’sagreatideathatyounow______payforplasticbagsinsomestores.Andinsteadofdrivingtoschoolorwork,you__________rideyourbikeorwalk.Ifit’sfar,you__________takethebus.Allthese

could

haveto

can/should

can/could

关掉

adj.可重复使用的

付费;付出代价

smallthings______addupandbecomebigthingsthat_________improvetheenvironment.Let’stakeactionnow!

could

would/can

采取行动

4c

Makealistofthingsthatpeoplecandotohelptheenvironmentanddiscussyourlistwithyourpartner.

usepublictransportation(n.交通运输);

turnoffthelightswhenyouleavearoom;

usereusablebagsinsteadofplasticbags;

rideyourbikeorwalktoschoolorwork;

stopusingpapernapkins(餐巾纸);

recyclebooksandpaper

…

Discussion

Ithinkthateveryoneshouldusepublictransportation.

Idisagree.It’sdifficultforparentswithyoungchildrentousepublictransportation…

Languagepoints

1.Wecan’taffordtowaitanylongertotakeaction!

affordv.承担得起;提供,给予

affordtodosth.(常与can,beableto连用)买得起;有足够的……

e.g.Wecan’taffordtopaysuchaprice.

我们付不起这个价钱。

Dancingaffordsuspleasure.

跳舞给我们带来快乐。

2.…saveelectricitybyturningoffthelightswhenyouleavearoom.

turnoff关掉

e.g.Pleaseturnthetelevis