Unit 2 Saving the earth. Topic 3 What can we do to protect the environment- SectionC课件（43张PPT内嵌音视频）

第第页Unit2Savingtheearth.Topic3Whatcanwedotoprotecttheenvironment?SectionC课件（43张PPT，内嵌音视频）(共43张PPT)

Unit2SavingtheEarth

Topic3Whatcanwedoathometoprotect

theenvironment

SectionC

Review

1.Thebreadinthisshopismoredeliciousthan_____inthatone.

A.itB.oneC.thoseD.that

2.Thetwoboys_____greenerpersonssincethen.

A.areB.willbeC.havebeenD.havebecome

3.Canyoutellus______there

A.whatareyoudoingB.whatyouaredoing

4.You’dbetterwalkorrideabikeinsteadof_____abusorataxiifyoutravelashortdistance.A.totakeB.taking

5.Weoughttotakeaclothbagwhengoingshopping.（改为否定句&一般疑问句）

We_____________takeaclothbagwhengoingshopping.

______we_____takeaclothbagwhengoingshoppingYes,weought.

D

C

B

B

Oughtto

oughtn’tto

Review

Howcanwebecomeagreenerperson

Turnoffthelightswhenweleavearoom.

Walkorrideabikeinsteadoftakingabusorataxi.

Takeaclothbagwhenwegoshopping.

Don’tdriveacarifyoutravelashortdistance.

Writeonbothsidesofthepaper.

Don’tusethethingsthatcanbeusedonlyonce.

Afterwewashfaces,wecanusethewatertowashclothes.

TurnofftheTVsetwhileweareaway.

…

课文关

Whatdoscientistsdotoprotecttheenvironment

Theyarestudyingnewwaystoproducepower.

It’sanelectriccar.Itworkswell,butit’stoosmalltoholdmanypeople.

electric(adj.)—electricity(n.)

What’sitWhatdoyouthinkofit

It’samaglevtrain.Itsadvantagesarequiet,fastandclean,butit’stooexpensive.

What’sitWhatdoyouthinkofit

It’sadevicetomakebiogas.

Chinaisoneofthefirstcountriesintheworldtousebiogastechnology.

What’sitWhatdoyouthinkofit

Task1

Workalone

Readformaininformation

Lookandmatch.

paragraph2

paragraph3

Paragraph4

A.acidrainB.nuclearenergyC.biogas

A

C

B

adj.原子核的，

原子能的

酸雨

1bReadandmatch.

Task2

Classwork

Readfordetail

Paragraph1

Inmanycountries,peopleproducepowerfromcoal,butitisverydirtyandcausesacidrain.Somecountriesusenuclearenergytoproducepower.However,nuclearpowercanbeverydabgerous.Tosolvetheenergyproblem,peopleallovertheworldarelookingfornewwaystoproducepower.

拓展：awaytodosth.=awayofdoingsth.

waystodosth.=waysofdoingsth.做某事的方法

()It’sgoodthatpeopleproducepowerfromcoal.

()Nuclearpowerisdangerous.Sowemustn’tuseit.

()Peopleallovertheworldarelookingfornewwaysto

producepowertosolvetheenergyproblem.

Readpara.1andmarkTrue(T)orFalse(F).

T

F

F

Paragraph2

_______Chinaisoneofthefirstcountriesintheworldtousebiogastechnology.Farmersrecyclestraw,grassandanimalwastetomakebiogas.Thisrenewableenergyisusedinpeople’severydaylives.Itskeydisadvantageisthattheprocessrequiresalongtime(upto30days)andthecostishigh.

C

Isn’tChinaoneofthefirstcountriesintheworldtousebiogastechnology

Whatdofarmersdotomakebiogas

What’stheadvantageofbiogas

Howlongdoestheprocessofmakingbiogasrequire

Howmanydisadvantagesdoesbiogashave

Yes,itis.

Theyrecyclestraw,grassandanimalwastetomakebiogas.

It’srenewableandusedinpeople’severydaylives.

Alongtime(upto30days).

Two.Oneisthelongprocess,andtheotheristhehighcost.

Readpara.2andanswer.

Paragraph3

______Electricvehiclesweredevelopedinthe1990s.OnApril11,2023,anewkindofelectricvehiclenamed“Yezi”wasshowninthe2023ShanghaiWorldExpo.Itproduceselectricityfromthesun,thewindandCO2.Itcannotonlyprotecttheenvironmentbutalsosaveenergy.It’stoosmalltoholdmanypeople,butlargermodelswillbedevelopedinthenearfuture.

A

Readpara.3andfillintheblanks.

Electricvehiclesweredevelopedinthe1990s.OnApril11,2023,anewkindofelectricvehiclenamed“Yezi”wasshowninthe2023ShanghaiWorldExpo.Itproduceselectricityfromthesun,thewindandCO2.Itcannotonlyprotecttheenvironmentbutalsosaveenergy.It’stoosmalltoholdmanypeople,butlargermodelswillbedevelopedinthenearfuture.

develop

name

show

由……生产电能

不但

而且

hold

develop

Paragraph4

______InChina,thebest-knownmaglevtrainistheGerman-builtoneinShanghai.Ittakespeoplejust7minutestogototheairpore30kmaway.Thetraincanreachatopspeedof431kmperhour.Itisquietandquick.Thereisnowheelnoise,becausetherearenowheels.Maglevtrainsareveryenergy-efficientanddonotpollutetheair.However,maglevguidepathsaremuchmoreexpensivethantraditionalsteelrailways.

B

1.去30公里以外的飞机场只需花费人们七分钟的时间。

Ittakespeoplejust7minutestogototheairport30kmaway.

2.火车最高时速能够达到每小时431公里。

Thetraincanreachatopspeedof431kmperhour.

Readpara.4andtranslatethesentences.

ItemAdvantageDisadvantage

biogas

electricvehicle

maglevtrain

renewable

longprocessandhighcost

saveenergy,

nopollution

toosmalltohold

manypeople

quiet,quick,

energy-efficient,nopollution

muchmoreexpensive

1cRead1aandcompletethetable.

1aLook,listenandsay.

Thesun,wind,wavesandheatfromdeepintheearthareenergysources.Theywillneverrunoutsotheyarecalledrenewablesources.In2023,about16%ofenergyusedworldwidecamefromrenewablesources.Theuseofitisincreasingrapidlyeachyear.

2aReadthepassagebelow.

runout/runoutof用完，耗尽(runranrun)

物+runout主语为物，且无被动。

人+runoutof主语为人

我们的食物已经用完了。

Ourfoodhasalready___________.

=Wehavealready____________thefood.

runout

runoutof

2aLookandmatch

Windcanproduceelectricityinmanyplaces.

2.Peopleusesunlighttoproduceelectricity.

3.Seawavesareusedforproducingelectricity.

4.Peopleusehotwaterorsteamfromdeepintheearthtoproduceelectricityandheatforfactories,schoolsandhomes.

2bTakenotesonyourdiscussionandwriteapassagewiththem.

Youmaybeginlikethis:

Sunlightcanproducealotofenergy.Peoplebegantousetheenergyfromthesunlightindifferentwaysmanyyearsago…

Youcanwriteitlikethis:

Sunlightcanproducealotofenergy.Peoplebegantousetheenergyfromthesunlightindifferentwaysmanyyearsago.Wecanuseittowarmthehouseinthewinter,toheatthewaterforbaths,andtoproduceelectricity.What’smore,wecanevenuseittorunvehiclesdirectlyinthenearfuture.

Asisknowntous,theenergyfromthesunlighthasalotofadvantages.Forexample,itisclean,renewableandnon-polluting.Besides,itdoesnoharmtoournature.Sowe’dbetteruseitasmuchaspossible.

语法关

Keypoints

1.Chinaisoneofthefirstcountriesintheworldtousebiogastechnology.

bethefirst+n.+todosth.是第一个做某事的

bethelast+n.+todosth.是最后一个做某事的

eg.(1)她是最后一个离开教室的人。

Sheis_________one__________(leave)theclassroom.

(2)我是第一个到教室的人。

Iam___________person__________(reach)theclassroom.

(3)Chinaisthefirstcountry_______5Gtechnology.

A.achieveB.torealizeC.achievingD.realizing

thelasttoleave

thefirsttoreach

B

back

2.Itskeydisadvantageisthattheprocessrequiresalongtime(upto30days)andthecostishigh.

keyadj.主要的，关键的

disadvantagen.缺点

processn.步骤，过程v.加工，处理

requirev.需要，需求upto达到

thecostishigh成本高

require有3种用法：

(1)requre/need+sth.“需要某物”

eg.我需要水。Irequre/needsomewater.

(2)sth.+require+(doing)sth.“某事需要被做”

主语是物，用动词ing形式表被动。

e.g.Thefloorrequirescleaning.地板该打扫了。

你的衣服需要洗了。/我的衣服该洗了。

Yourclothesrequire___________(wash).

(3)requiresb.todosth.=asksb.todosth.要求某人做某事

也可以用被动形式表达：sb.+berequiredtodosth.某人被要求做某事

Mymotherasks/requiresme_________(buy)somesaltforher.

=Iamrequired_________(buy)somesaltformymother.

washing

tobuy

tobuy

back

cost的2种用法：

（1）costv.花费(costcostcost)

sth.costtoomuch/toolittle.译为“花费”时，用“多/少”来描述。

sth.costsb.+钱（做谓v.时，主语必须是物。）

eg.ThegoldwatchcostMrs.Zhou30thousandyuan.

ThegoldwatchcostMrs.Zhou________.A.toohighB.toomuch

(2)costn.成本译为“成本”时，用“高/低”来描述。

eg.Thecostofthegoldwatchis_______.A.toohighB.toomuch

=Thegoldwatchcoststoomuch.

思考：Thegoldwatchis________.A.expensiveB.toomuchC.toohigh

（物品讲贵贱，成本讲高低。）

B

A

A

back

及时练习1

1.Theyrequiredus_____theplan.

A.carryoutB.carringoutC.tocarryoutD.carriedout

2.Thesebeautifulflowersrequire_______.

A.towaterB.wateringC.wateredD.water

3.Thecostofbuildingthebridgeis_______.

A.expensiveB.cheapC.toohighD.toolittle

4.Buildingthebridgecosts______.

A.expensiveB.cheapC.toolowD.toomuch

5.Hisnewcomputeris_____.Ialsowanttobuyone.

A.expensiveB.dearC.cheapD.low

C

B

C

D

C

back

3.Itcannotonlyprotecttheenvironmentbutalsosaveenergy.

以下3对连词，在连接两个主语时，采用“就近原则”。

notonly...butalso...（是both...and...的同义词组）

neither...nor...（是both...and...和notonly...butalso...的反义词组）

either...or...

both...and...连接主语时，用作复数。

eg.BothIandhe_______(be)athome.

NeitherInorhe_______(be)atschool.

Eitherheoryou_______(be)inthedinninghall.

NotonlyshebutalsoI______(be)ontheplayground.

are

is

are

am

back

及时练习2

1.Forher,someclothesintheshoparetoobig,othersaretoosmall.（改为同义句）

Theclothesintheshopare________toobig______toosmallforher.

2.Notonlythestudentsbutalsotheteacherwasagainsttheplan.

改为同义句：______thestudents______theteacher______againsttheplan.

改为否定句：______thestudents______theteacher______againsttheplan.

3.这孩子既健康又活泼。（完成译句）

Thechildis___________healthy__________lively.

eitheror

Bothandwere

Neithernorwas

notonlybutalso

back

4.It’stoosmalltoholdmanypeople.

(1)holdv.容纳，抓住，举行holdon,please.别挂断，请稍等。

翻译句子：

1.TiananmenSquarecanholdaboutonemillionpeople.

2.Holdthebabyaminute,please.

3.Theywillholdameetingtodiscusstheproblemtomorrow.

(2)too+adj.+todosth.太而不能（常与以下句型作同义替换）

not+adj.(用原句的反义词）+enough+todosth.

so+adj./adv.+that从句

such+(a/an)+...+n.+that从句

back

及时练习3（同义句转换）

1.Mysisteristooyoungtogotoschool.

=Mysisterisn’t___________togotoschool.

2.Thedinninghallissosmallthatitcan’tholdfiftypeople.

=Thisis______asmalldinninnghall______itcan’tholdfiftypeople.

=Thedinninghallis______small_____holdfifitypeople.

=Thedinninghallisn’t___________toholdfiftypeople.

oldenough

suchthat

tooto

bigenough

back

5.Ittakespeoplejust7minutestogototheairport30kmaway.

“三个花一个付”

(1)人+spend+money/time+onsth./(in)doingsth.

(2)人+pay+money+forsth.

(3)物+cost+(sb.)+money

(4)It+takes+(sb.)+time+todosth.

(it是形式主语，todosth.是真正的主语）

spend—spent—spent(ABB型）

pay—paid—paid(ABB型）

cost—cost—cost(AAA型）

take—took