2023学年完整公开课版（3a4c）We'retringtosavetheearth

3a-4cSectionAUnit13We’retryingtosavetheearth.单项填空。1.Ithinkwewillplay______Classonethisafternoon.A．about B．in C．toD．against2.Yourbedroomistoodirty.Please________.A．cleanitup B．cleanupitC．setitup D．putitup3.Theboy

stayedathomeallday_____goingtoschoollastterm.A．instead B．insteadof C．takeplaceof D．taketheplaceofDABTestyourself完成句子，每空一词。1．电在我们日常生活中起着重要作用。Electricity______animportant_____inourdailylife.2．你的抽屉真是一片混乱，你介意清除一下吗？Yourdrawerisreallyamess.Wouldyoumind_____________？3．要是你忙的话，就改日再来吧。Ifyouarebusy,youmaycomeanotherday________.

4．我们必须减少水的用量。Wemust_______________theamountofwaterweuse.5．昨天晚上我们县城的电被切断了。Electricitywas___________inourtownlastnight.playspartcleaningitupinsteadcutdownoncutoffsharkfincruelharmfulbeharmfultoatthetopofchainthefoodchainecosystemindustrylawscientificn.鲨鱼n.（鱼）鳍adj.

残酷的；残忍的adj.

有害的对有害的在顶部或顶端n.链子；链条食物链n.生态系统n.工业；行业n.法律；法规adj.科学上的；科学的WordsReviewTheearthisbadlypolluted.Whatshouldwedotosavetheearth?WarmingupLet’stakeaction(采取行动)Turnoffthelightswhenyouleavearoom.Recyclebooksandpaper.Takebusesinsteadofdrivingcars.Therearesomeanimalsareendangered.Weshoulddosomethingtoprotecttheanimalsandtheenvironment!

Savetheearth!Savetheanimals!Tvidesth.forsb.=providesb.withsth.提供某人某物offersth.tosb.=offersb.

sth.1.Haveyoueverseenashark（鲨鱼）?2.Whatdoyouknowaboutsharks?Discusswithyourpartner:1.Wheredosharkslive?__________________________________2.Aretheyallverybig?___________________________________3.Whatdotheyeat?___________________________________4.Isthenumberofsharksdecreasing?___________________________________5.Whydopeoplecatchthem?___________________________________Whatdoyouknowaboutsharks?Inthesea.Yes,itis.Tocutofftheirfins.Yes,theyare.Fishes.3aSkimmingPara.1Para.2Para.3Badthingshappenwhenpeoplecutoffsharks’fins.Environmentalprotectiongroupshavedonethingstoprotectsharks.You’rekillingawholesharkwhenyouenjoyabowlofsharkfinsoup.速读文章，找出段落大意。southernChina70millionover90percentWildAidandtheWWFSharksareendangered,readthepassageandjudgethesentences.Readthefirstparagraph1.Shark’sfin（鱼鳍）soupisfamousandexpensiveallaroundtheworld.2.Wehavetokillawholesharktogetabowlofshark’sfinsoup.×√Readthesecondparagraph1.Peoplecutoffsharks’finsandthrowthesharksbackintotheocean.2.Sharksareinthebottomofthefoodchainintheocean’secosystem.√×n.

生态系统食物链ReadParagraph2andfillinthechart.peopleenjoy_____________________fishermen___________,___________,then_______________________________________________________decreasedquicklyabowlofsharkfinsoupcatchsharkscuttheirfinsthrowthemintotheoceanThenumbersofsomekindofsharks仔细阅读第二段，完成下面的句子。Badthingshappentosharkswhenpeoplecutofftheirfins.Whenpeoplecatchsharks,they_______theirfinsand_______theshark_______intotheocean.Withoutafin,asharkcannolonger________andslowly_______.Ifsharks’numbers________toolow,itwill________dangertoalloceanlife.Task2cutoffthrowbackswimdiesdropbringReadthethirdparagraph1.WildAidandtheWWFareenvironmentalprotectiongroupsinChina.2.Shark’sfinsaregoodforhealth.××仔细阅读第三段，完成下面的句子。Somethingsthatenvironmentalprotectiongroupshavedone:They__________thepublicabout"finning".Theyhaveevenaskedgovernments_____________tostopthesaleofsharkfins.Task3areteachingtodeveloplawsReadthepassageagainandfillintheblankswiththewordsinthebox.Manypeopledonotrealizetheyarekillingawholeshark________theyenjoyabowlofsharkfinsoup.Sharksareatthetopofthefoodchain,_____iftheirnumbersdrop,theocean’secosystemwillbeindanger.Manythinkthatsharksaretoostrongtobeendangered,_____theyarewrong._________therearenoscientificstudiestosupportthis,alotofpeoplebelievethatsharkfinsaregoodforhealth.Sharksmaydisappearoneday____wedonotdosomethingtostopthesaleofsharkfins.soalthoughifbutwhenwhensobutifAlthough3bLet'sdothistoreviewthetext!!!Somepeopleliketoeatshark'sfinsoup,especiallyin_______China.Butgettingtheshark'sfinisvery_____.Whenpeoplecatchsharks,they________theirfinsandthrowthesharksintotheocean.Thesharkslowlydiesbecauseitcan't_____withoutthefin.Anditisalso______toenvironment.Sharksareatthe____ofthefoodchain.Ifthenumberofsharksdropstoolow,itwillbreakthebalanceofnuture.Pleasesaynotoeatingthesharkfinsoup,andtakeactiontosavethesharks!southerncruelcutoff

swimharmfultopCheckifyouknowthesephrases.1.把垃圾扔到河里2.在…中起作用3.在中国南部4.对……有害5.在……顶部6.海洋生态系统throwtherubbishintotheriverplayapartininsouthernChinabeharmfulto/doharmto…atthetopoftheocean’secosystem3AfteryoureadRetellthepassageaccordingtothewordsbelow.shark’sfinsoup;insouthernChina;eachtime;cutoff;nolonger;notonly…butalso…;atthetop;drop;beendangered;thestrongest;around70million;fallen;byover90percent;WildAidandtheWWF;developlaws;scientificstudiesSummarizethearticleanddiscussitwithyourpartner.sharkshearof…ispopular…realize…enjoy…cutoff…throw…backinto…notonly…butalso…atthetopofbeendangeredarecaughtandtradedthenumberofsuchas…teachabout…developlaws…aregoodfor观察与思考1)notonly…butalso…用于连接两个表示并列关系的成分，着重强调后者，意为_________；可与both...and…替换。若连接两个成分作主语，其谓语通常与_________保持一致。Otherexamples:NotonlydoeshespeakfluentEnglish,buthecanalsospeakChineseandFrenchwell.

Exerciseisnotonlygoodforhealth,butalsofun.Thisisnotonlycruel,butalsoharmfultotheenvironment.不仅而且相近的主语这种方法不但残忍而且对环境有害。beharmfulto对……有害e.g.Smokingisharmfultothehealth.

吸烟有害健康。

Playingcomputergamesmuchisharmfultostudents.

电脑游戏玩太多对学生有害。3.Sharksareatthetopofthefoodchainintheocean’secosystem.

鲨鱼位于海洋生物系统食物链的顶部。atthetopof

在……最高地位;用最高[最大]的(速度,声音等)e.g.Ilookedatthetopofhishead,hishairshinyandpartedsmoothly.

我看他的头顶,头发闪亮且平滑的分开。Heshoutedatthetopofhisvoiceinorderthathemightbeheard.他尽力大声叫喊,以便别人能听见。Thenumberofsomekindsofsharkshavefallenbyover90percentinthelast20to30years.观察与思考2)anumberof与thenumberof的用法：thenumberof意为“…的数量”，跟复数名词连用作主语时，中心词是number，谓语动词用单数。anumberof意为“许多”，相当于many，修饰可数名词复数。作主语时，谓语动词用复数。number前可用large，small等修饰，以表示程度。练习：选词填空：thenumberof,anumberof1.______________teachersinourschoolis350.2.______________teachersliketoreadbooks.ThenumberofAnumberoftakepartinaffordturnoffreusablepayfortakeactiontransportation参加v.买的起；承担的起（后果）关掉adj.

可重复使用的付费；付出代价采取行动n.运输业；交通运输WordsReviewrecyclenapkinn.回收利用；再利用n.餐巾；餐巾纸Wearetryingtosavetheearth.PresentprogressiveTheriverusedtobesoclean.usedtoTheairisbadlypolluted.PassivevoiceNoscientificstudieshaveshownthatsharksfinsaregoodforhealth.PresentperfectWeshouldsavethesharks.ModelverbsGrammarFocusPayattentiontothesentences.1.We’re

tryingtosavetheearth.2.Theriverusedtobesoclean.3.Theairisbadlypolluted.4.Noscientificstudieshaveshownthatsharkfinsaregoodforhealth.5.Weshouldhelpsavethesharks.PresentprogressiveusedtoPassivevoicePresentperfectGrammarFocusModalverbs本单元复习1.现在进行时、2.usedto句型、3.被动语态、4.现在完成时5.情态动词。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。Whatafinedaytoday!Look!Whataretheydoing?Exerciseusedtodosth.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.Iusedto

getupatsixo’clock.Joeisusedtodrinkingacupofcoffeeeverymorning.usedtodo与beusedtodoingTranslation.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.Exercise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.被动语态初中阶段我们学习了七种被动结构，归纳如下：（1）一般现在时是被动语态：am/is/are+过去分词（2）现在完成时的被动式：

have/has+been+过去分词（3）现在进行时的被动式：am/is/are+being+过去分词（4）一般过去时的被动式：was/were+过去分词（5）过去进行时的被动式：was/were+being+过去分词（6）过去完成时的被动式：had+been+过去分词（7）一般将来时的被动式：will/begoingtobe+过去分词（8）含有情态动词的被动式：情态动词+be+动词的过去分词。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.Exercise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.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.Joe:_____youever_____(take)partinanenvironmentalproject?Ken:Yes,Ihave.I_____(help)withaClean-UpDaylastyear.Itwas__________(consider)thebiggestclean-upprojectthiscityever________(have).Fillintheblankswiththecorrectformsoftheverbsinbrackets.Havetakenhelpedconsideredhadhad4a参加Joe:Howmanypeople______(take)part?Ken:I_____(think)morethan1,000people_____(come)tohelpout.Joe:That’sfantastic!Iguesseveryoneinthiscityis_______(try)toimprovetheenvironment.Ken:Yes,wecan't

afford

to_____(wait)anylongertotakeaction!tookthinkcametryingwaitv.

承担得起(后果);买得起4bFillintheblankswiththeappropriatemodalverbsfromthebox.People__________thinkthatbigthings______bedonetosavetheearth.Manyforgetthatsavingtheearthbeginswithsmallthings.Forexample,you____savemay/mightmustcancanwouldcouldhavetoshouldmustmay/mightelectricitybyturningoffthelightswhenyouleavearoom.You______alsousecould关掉adj.可重复使用的reusablebagsinsteadofplasticbags.Ithinkit’sagreatideathatyounow______payforplasticbagsinsomestores.Andinsteadofdrivingtoschoolorwork,you________rideyourbikeorwalk.Ifit’sfar,you__________takethebus.Allthese

couldhavetocan/shouldcan/couldadj.可重复使用的付费;付出代价smallthings______addupandbecomebigthingsthat_________improvetheenvironment.Let’stakeactionnow!couldwould/can采取行动Makealistforthingsthatpeoplecandotohelptheenvironmentanddiscussyourlistwithyourpartner.A:Ithinkthateveryoneshouldusepublictransportation.B:Idisagree.it'sdifficultforparentswithyoungchildrentousepublictransportation...usepublictransportation...4cDiscussing...usepublictransportationtakeyourownshoppingbagswhengoshoppingreducetheuseofairconditionersinsummerturnoffthelightswhenyouleavetheroomgrowmoreplants...4cA:Ithinkthateveryoneshouldtakeyourownshoppingbagswhengoshopping.B:Iagree.it'sgoodfortheenvironment.C:…….D:…..Ithinkthateveryoneshouldusepublictransportation..用方框中词的适当形式完成下面的句子。Ithinkit’s____tomakesuchayoungboy

workallday.(2)Thepoorfishermancan’t_____hischildren’s

education.(3)Ithinkthegovernmentmustdevelop_____to

protectenvironment.(4)Eatingtoomuchjunkfoodis_______your

health.(5)Hecanusedifferent_______toworkoutthe

problem.method,cruel,harmful,afford,lawcruelaffordlawharmfulmethodII.单项选择。1.—Areyougoingto_____anyoftheevents?

—Yes.Maybelon