人教版新目标英语九年级全册Unit-13第三课时Section-A-3课件

Unit13Unit13We'retryingtosavetheearth!SectionA3GrammarFocus-4cRevision

不同种类的污染2.河底3.把垃圾扔到河里4.在……中起作用differentkindsofpollutionthebottomoftheriverthrowrubbishintotheriverplayapartinI.Checkifyouknowthesephrases.5.在中国南部6.对……有害7.在……顶部8.海洋生态系统insouthernChinabeharmfulto

atthetopof…theocean’secosystemII.Translation.1.这个方法不仅残酷还对环境有害。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.LearningobjectiveToreviewtheuseofThePresentContinuousTense,passivevoice,PresentPerfectandModalVerbs.Payattentiontothesentences.1.We’re

tryingtosavetheearth.2.Theriverusedtobesoclean.3.Theairisbadlypolluted.4.Noscientificstudieshaveshownthatsharkfinsaregoodforhealth.5.Weshouldhelpsavethesharks.PresentprogressiveusedtoPassivevoicePresentperfectGrammarFocusModalverbsTheyareplayingbasketball.Nancyisworkingonanewbookaboutstoriesinschools.Whyareyoualways

cominglateforclass?正在发生目前一段时间内正在进行含说话者的强烈情感现在进行时现在进行时: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。或说话者的强烈情感。Whatafinedaytoday!Look!Whataretheydoing?Exercise1.Paul,I’mbusycooking.Canyougivemeahand?—Justaminute.I______mye-mail.(2017河南)A.amchecking

B.willcheck

C.havechecked

D.waschecking

中考链接A2.Don’ttakethedictionaryaway,I_____it.(2017河北)A.use

B.used

C.amusing

D.haveused

Cusedtodosth.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beusedtodoingTranslation.1.她过去常常周末和朋友闲逛。

Sheusedtohangoutwithfriendsonweekends.2.他习惯晚睡。

Heisusedtostayingup.ExerciseMygrandfatherbuiltthishousein1930.Thishousewasbuilt(bymygrandfather)in1930.Passivevoicebe+V-ed主谓宾主动语态表示主语是动作的执行者,被动语态表示主语是动作的承受者。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.ThefirstsectionofNewCollegeEnglishisdesignedforspeakingpracticeand

isbasedonpicturesandtopics.

Thesecomputers

weremade

inourowncountrylastyear.Shallwe

beasked

toattendtheopeningceremony?

①一般现在时的被动语态：am/is/are+V-ed

②一般过去时的被动语态：was/were+V-ed③一般将来时的被动语态：will/shall+be+V-ed1.某些感官动词加形容词及少数其他的动词与一些副词连用表示被动意义。

smell,taste,prove,sell,etc.1)Thedish

tastes

delicious.

2)Thetheory

proved

rightatlast.3)Thebookissointerestingthatit

sells

well.4)Thepenwriteswell.不可以变成被动语态的情况need做实意动词时，need+V-ing

主动形式表示被动意义。我的车需要修理。

Mycarneedsrepairing.

(=toberepaired).战争爆发了。Thewarbrokeout.但不能说：Thewarwasbrokenout.3.通常只有及物动词（组）才有被动语态，不及物动词没有。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.ExerciseThemobilephone______in1973.

(2017北京)A.invents

B.isinvented

C.invented

D.wasinvented

中考链接D2.Let’swaitandseewhetherbooks_____bytheInternetinthefuture.

(2017天津)A.replace

B.replaced

C.willbereplaced

D.werereplacedC3.—Whyareyouleavingyourjob?—Ican’tstanditanylonger.I_____always_____toworkovertime.(2017河南)A.am;asking

B.am;asked

C.was;asking

D.was;askedBLily,cleanyourteethplease.Mum,Ihave

already

cleanedthem.futurepresentpastcleanedteeth现在完成时表示动作发生在过去，并对现在有影响。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:PresentperfectCompletethefollowingsentences.I_________(be)inBeijingfortwoyears.2.I_____never_____(hear)ofthatmanbefore.3.Tom__________(work)theresincetwoyearsago.havebeenhaveheardhasworkedExercise4.Thetwins___________(wash)theclothesforanhour.5.He_________(play)basketballsincethreeyearsago.6.Howlong____Sally_____(sing)yet?havewashedhasplayedhassung1.Lilyismyclassmate.We______eachothersinceshecametoourschool.

(2017北京)A.know

B.knew

C.haveknown

D.willknow

中考链接C2.I_____inthecitysinceIleftschool.

(2017天津)A.live

B.willlive

C.wasliving

D.havelived

D3.Inthepastfewyears,manyschools______thewaysofdoingmorningexercises.

(2017重庆)A.change

B.changes

C.willchange

D.havechanged

D情态动词用来表示能力、应该、请求等,后接动词原形。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.Kencanclimbupthetresslikeakoala.Tracycouldrideabicyclewhenshewasfiveyearsold.Youmustn’tplaywithfire.Itisdangerous.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。ExerciseWecan’teatintheclassroom.

Youmustfinishyourhomeworkfirst.Hecan’tbeathomenow.

Shemustknowtheanswertothisquestion.1.—_____Iparkmycarhereforawhile?—No,youmustn’t.Doyouseethesign“NOPARKING”?

(2017上海)A.Would

B.May

C.Must

D.Should

中考链接B2.—MayItakethedogwithme,sir?—______.Petsarenotallowedtoenterthehall.(2017重庆)A.Yes,youmay

B.No,youmustn’tC.Yes,youcanD.No,youneedn’t

B3.—Idon’tcarewhatpeoplethink.—Well,you_____.You’renotaloneinthisworld.

(2017河南)A.can

B.may

C.should

D.willC4.Ihavetraveledalot.I_____speakfourlanguages.

(2017河北)A.can

B.may

C.must

D.needA4aFillintheblankswiththecorrectformsoftheverbsinbrackets.Joe:_____youever______(take)partinanenvironmentalproject?Eric:Yes,Ihave.I______(help)withaClean-UpDaylastyear.Itwas__________(consider)thebiggestclean-upprojectthiscity____ever____(have).Havetakenhelpedconsideredhadhad参加Joe:Howmanypeople____(take)part?Eric:I_____(think)morethan1,000people______(come)tohelpout.Joe:That’sfantastic!Iguesseveryoneinthiscityis______(try)toimprovetheenvironment.Eric:Yes,wecan’t

affordto____(wait)anylongertotakeaction!tookthinkcametryingwaitv.

承担得起(后果);买得起4bFillintheblankswiththeappropriatemodalverbsfromthebox.People__________thinkthatbigthings_____________bedonetosavetheearth.Manyforgetthatsavingtheearthbeginswithsmallthings.may/mightmust/havetocanwouldcouldhavetoshouldmustmay/mightForexample,you____________________saveelectricitybyturningoffthelightswhenyouleavearoom.You________________alsousereusablebagsinsteadofplasticbags.

can/could/shouldcanwouldcouldhavetoshouldmustmay/mightcould/can/shouldreusableadj.可重复使用的Ithinkit’sagreatideathatyounow______payforplasticbagsinsomestores.Andinsteadofdrivingtoschoolorwork,you________________rideyourbikeorwalk.Ifit’sfar,you_________takethebus.havetopayfor

付费;付出代价can/should/couldcan/couldcanwouldcouldhavetoshouldmustmay/mightAllthese

smallthings__________addupandbecomebigthingsthat_______________improvetheenvironment.Let’stakeactionnow!can/couldwould/can/could采取行动canwouldcouldhavetoshouldmustmay/might4cMakealistofthingsthatpeoplecandotohelptheenvironmentanddiscussyourlistwithyourpartner.usepublictransportation(n.交通运输);turnoffthelightswhenyouleavearoom;usereusablebagsinsteadofplasticbags;rideyourbikeorwalktoschoolorwork;stopusingpapernapkins(n.餐巾纸);recyclebooksandpaper…DiscussionIthinkthateveryoneshouldusepublictransportation.Idisagree.It’sdifficultforparentswithyoungchildrentousepublictransportation…1.Wecan’tafford

towaitanylongertotakeaction!

affordv.

承担得起;买得起；提供,给予常与can,beableto连用

affordsth.

买得起/承受得起某物

affordtodosth.

有能力做某事/负担得起做某事e.g.Canyouaffordthemobilephone?Wecan’tafford

topaysuchaprice.afford&buyafford侧重“有经济能力买”，而buy则侧重“购买(这一行为)”。表示“我买不起……”可以说Ican’tafford...，但不能说Ican’tbuy...。用afford或buy的适当形式填空。1)Theycan’t_______tosendtheirchildrentocollege.2)Canyou_______anewcar?3)Helen_______somefruitonherwayhomeyesterday.affordaffordbuy2.…saveelectricitybyturningoffthelightswhenyouleavearoom.

turnoff关掉

e.g.睡觉前请关掉电视。(翻译)Please

turn

thetelevisionoff

beforeyougotobed.turnon

打开,发动turnaround

转身turnup

调高(音量)turndown

调低;拒绝turninto

变成;进入turnover

移交拓展:turn相关短语六种时态时态一般现在时一般过去时现在进行时过去进行时一般将来时现在完成时用法表示经常性发生的动作、习惯性动作或客观真理、科学事实等。表示过去某个时间发生的动作或存在的状态。表示现在或现阶段正在进行或发生的动作。表示过去某时正在进行的动作或存在的状态。表示将来某个时间要发生的动作或存在的状态。表示过去发生或者未发生的事对现在造成的影响或结果。构成方式1.动词be(am/is/are)+表语…2.动词原形+…(主语是第三人称单数，动词也用第三人称单数)1.动词was/were+表语2.实义动词的过去式+…be(am/is/are)+动词的现在分词was/were+动词的现在分词1.will/shall+动词原形(shall用于第一人称)2.begoingto+动词原形主语+have/has+过去分词+…句型变化疑问式1.Be+主语+…?2.Do/Does+主语+动词原形+…?1.Was/Were+主语+…?2.Did+主语+动词原形+…?Be+主语+动词的现在分词+…?Was/Were+主语+动词的现在分词+…？1.Will/Shall+主语+动词原形+…?2.Be+主语+goingto+动词原形+…?Have/Has+主语+过去分词+…？否定式1.主语+be+not+…2.主语+don’t/doesn’t+动词原形+…1.主语+was/were+not+…2.主语+didn’t+动词原形+…主语+be+not+动词的现在分词+…主