2020人教版九年级英语下册unit-13单元全套课件

unit13人教版九年级英语下册单元全套课件We’retryingtosavetheearth!unit13人教版九年级英语下册单元全套课件We’retSectionA1a-2d

目录SectionA3a-3cSectionAGrammarFocus-4cSectionB1a-2eSectionB3a-SelfCheck使用说明：点击对应课时，就会跳转到相应章节内容，方便使用。SectionA1a-2d目录SectionUnit13We’retryingtosavetheearth!人教版九年级英语下册SectionA1a-2dUnit13人教版九年级英语下册SectionA1a-ObjectivesTotalkaboutairpollution,waterpollutionandnoisepollution.Tothinkaboutwaysofprotectingtheenvironment.Tolearntousethesentencepatterns

usedto...butnowshoulddosth.ObjectivesTotalkaboutairpoHerearesomewordsrelatedtodifferentkindsofpollution.Writethemintheboxbelow.Thenaddmorewords.1aHerearesomewordsrelatedtonoisepollution________________________________________________airpollution____________________________________________waterpollution________________________________________________loudmusicplanesmobilephonesfactoriescarssmokingshipsfactorieslitteringrubbishbuildinghousesbuildinghousesloudmusiccarsrubbishplaneslitteringshipsfactoriessmokingbuildinghousesmobilephonescarsnoisepollutionairpollutionListenandcompletethesentences.Whatwastheproblem?Theriverwas_____________.Eventhebottomoftheriverwasfullof_________.Therewerenomore______forfishermentocatch.reallydirtyrubbishfish1bListenandcompletethesentenWhatcausedtheproblem?Peoplearethrowing_______intotheriver.Factoriesareputting______intotheriver.Howshouldtheproblembesolved?Weshouldwritetothe____________andaskthemto___________thefactories.Everyoneshouldhelpto__________theriver.litterwastegovernmentclosedowncleanupWhatcausedtheproblem?PeopleListenagainandanswerthefollowingquestions.WhatdoesTonywanttodolaterthisafternoon?HewantstogoswimmingwithMarkintheriverlaterthisafternoon.Listenagainandanswerthefo2.Whydoesn’tMarkwanttogowithTony?

Becausetheriverwasreallydirty.Eventhebottomoftheriverwasfullofrubbish,andtherewerenomorefishforfishermentocatch.3.Howwastheriverinthepast?

Itusedtobesoclean.Ithasbeenthenicestriverinthistown.2.Whydoesn’tMarkwanttogoRole-playtheconversation.Thenmakeyourownconversationsaboutthekindsofpollutionin1a.1cMark:Theriverwasdirty.Eventhebottomoftheriverwasfullofrubbish.Tony:Butitusedtobesoclean!Mark:Yes,butpeoplearelitteringintheriver.Tony:Everyoneinthistownshouldplayapartincleaningitup!Role-playtheconversation.ThListentotheinterview.CirclethekindsofpollutionthatJasonandSusantalkabout.landpollutionB.airpollutionC.noisepollutionD.waterpollution2aListentotheinterview.CirclListenagainandcompletethesentences.1.Theairisbadlypollutedbecausethereare___________ontheroadthesedays.2.Factoriesthatburncoalalso________theairwithalotofblacksmoke.morecarspollute2bListenagainandcompletethe3.Thereisalsotoomuchrubbishandwaste.People_________________thingseveryday.4.Peoplearealsolitteringin______________likeparks.Thisisturningbeautifulplacesintougly

ones.arethrowingawaypublicplaces3.ThereisalsotoomuchrubbUsetheinformationin2aand2btorole-playconversationsbetweenJasonandSusan.2cJason:Theairhasbecomereallypollutedaroundhere.I’mgettingveryworried.Susan:Yes,Iusedtobeabletoseestarsinthesky.Jason:Theproblemisthat...Usetheinformationin2aandWhatshouldwedotosavetheearth?WhatshouldwedotosavetheTurnoffthelightswhenyouleavearoom.Turnoffthelightswhenyoulstopridingincarsstopridingincarsstopusingpapertowelsornapkins

n.餐巾,餐巾纸stopusingpapertowelsornaprecycle

booksandpaperv.回收利用;再利用recyclebooksandpaperv.回收利用Interviewer:JasonandSusan,whatareyourideasforsolvingtheseproblems?Jason:Well,tocutdownairpollution,weshouldtakethebusorsubwayinsteadofdriving.Susan:Yeah,orrideabike.Thereareother

advantagesofbikeriding.It’sgoodforhealthanditdoesn’tcostanything!Role-playtheconversation.2dInterviewer:JasonandSusan,Interviewer:Greatideas!Whataboutwaste

pollution?Susan:Mmm,Ithinksimplethingslike

bringingabagtogoshoppingcanhelp.

Istarteddoingthatayearago.Jason:Me,too.Also,Inevertakewooden

chopsticksorplasticforkswhenIbuy

takeawayfood.Iusetheonesathome.Interviewer:Greatideas!WhatSusan:Andremembertothrow

rubbishinthebinsandkeep

publicplacescleanand

beautifulforeveryone.Interviewer:Sotogether,ouractions

canmakea

difference

andleadtobetter

future!Susan:AndremembertothrowCompletethechart.ProblemsSolvingproblemsairpollutionwastepollutiontakethebus,subwayorrideabikeinsteadofdrivingbringabagtogoshoppingusechopsticksorforksathomehrowrubbishinthebinsCompletethechart.ProblemsSolWe’retryingtosavetheearth!我们正在竭尽全力拯救地球!trytodo=tryone’sbesttodo努力去做某事e.g.We’ll

try

tofinishtheworkinaweek.

我们将努力在一周内完成这项工作。LanguagepointsWe’retryingtosavetheearthHerearesomewordsrelatedtodifferentkindsofpollution.berelatedto与……有关e.g.

Isthedriverrelatedtotheaccident?

司机和这起事故有关吗？HerearesomewordsrelatedtoEventhebottomoftheriverwasfullofrubbish.Yes,butpeoplearethrowinglitterintotheriver.litter和rubbish都可指“垃圾”，用作不可数名词。litter指“（室内或公共场所）乱扔的废物（纸屑、不要的包装纸、废瓶等）”还可回收。rubbish指“没用的东西（被扔或将要丢弃的无用的东西）”不可回收。Eventhebottomoftheriverwe.g.Throwtherubbishout.把垃圾扔出去。Theroomisfullofrubbish.房间里堆满了垃圾。Pickupyourlitterafterapicnic.野餐后将废弃物收拾好。e.g.Throwtherubbishout.Everyoneinthistownshouldplayapartincleaningitup!playapartin在……方面起作用e.g.Agooddietplaysalargepartinhelpingpeoplelivelonger.

健康的饮食在帮助人们长寿方面起着非常

大的作用。EveryoneinthistownshouldpIt’sgoodforhealthanditdoesn’tcostanything!cost

v.花费；使付出，指花费金钱，主语通常是物。cost的过去式和过去分词均为cost。e.g.ThenewshirtcostMrWang200yuan.

王先生花了200元买了新衬衫。

Howmuchdoesthenewcomputercost?

新电脑花了多少钱？It’sgoodforhealthanditdotake,spend,pay&costtake，spend，pay和cost都可以表示“花费”，但它们的用法各有不同。take多表示花费时间常用于Ittakessb.sometimetodosth.句型中，其中it作形式主语。e.g.Itusuallytakesme40minutestocookthedinner.take,spend,pay&costspend多表示花费时间和金钱，主语常是人，常用于sb.spend(s)sometime/moneyonsth.sb.spend(s)sometime/money(in)doingsth.两种句型。e.g.Davidspent2,000yuanonthenewmachine.Myfatherspendsanhour(in)watchingthenewsonTVeveryday.spend多表示花费时间和金钱，主语常是人，pay多表示花费金钱，主语通常是人，常用于sb.pay(s)somemoneyforsth.句型。e.g.Tommypaid20yuanforhisbreakfastyesterday.cost多表示花费金钱，主语通常是物，常用于sth.cost(s)(sb.)somemoney.句型。e.g.ThenewdresscostLinda88yuan.pay多表示花费金钱，主语通常是人，常用于sb.根据句意用take,spend,pay或cost的适当形式填空。1.Thatnewcar________

themlotsofmoney.2.Mona__________50yuanonthebooksjustnow.3.Itusually_______

meanhourtodomyhomework.cost

spent

takes根据句意用take,spend,pay或cost的适当形4.Youshould__________

sometimepractisingyourpronunciation.5.Mybrother_______

6,000yuanforthenewcomputeryesterday.spendpaid4.Youshould__________

someExercisesbin,cost,coal,fisherman,takeaway1.Ahot________felloutofthefireandburntthe

carpet(地毯).2.A__________ishotcookedfoodthatyoubuyfrom

ashoporrestaurantandeatsomewhereelse.coaltakeawayI.根据句意，从方框中选择恰当的单词填空，

有的需要变换形式。Exercisesbin,cost,coal,3.DoyouwantthisorshallIthrowitinthe

________?4.Writingsuchalongnovel________much

timeandpatience.5.Look!Some____________arecatchingfish

overthere.costsfishermenbin3.DoyouwantthisorshallIII.根据汉语意思完成英语句子。1.工人们正在竭尽全力降低事故率。

Theworkersaredoingalltheycan___________

theaccidentrate.2.左边第二个房间里堆满了书。

Thesecondroomontheleftis

_______________

books.tocutdownfullof/filledwithII.根据汉语意思完成英语句子。tocutdownfu3.你应该向那些参与挽救病人的医生道谢。

Youshouldsaythankstothosedoctorswho

have_________________savingthepatient.playedapartin4.拉里将去开会，而不是我。Larrywillgotothemeeting__________me.insteadof3.你应该向那些参与挽救病人的医生道谢。playeda5.我的目的是把这件坏事变成好事。

Mypurposeisto________thisbadthing

________a

goodone.6.保持教室干净是我们的责任。

It’sourdutyto________theclassroom

_______.turnkeepintoclean5.我的目的是把这件坏事变成好事。turnkeepinto7.我们小区的噪音污染很严重。

The_________________inourneighborhood

isveryserious.noisepollution7.我们小区的噪音污染很严重。noisepollutioIII.汉译英。我尽量今天晚上完成工作。他在工作中其重要作用。这些问题都是密切相关的。Iwilltrytofinishtheworkthisevening.Heplaysanimportantpartinthework.Theseproblemsarecloselyrelated.III.汉译英。Iwilltrytofinish中考链接(2019·贵州安顺)—Myfather_________tohisworkplacebybus,butnowhe__________therebybike.—Really?Youhaveanenvironmentally-friendlyfather.A.usedtogo,isusedtogoB.usedtogoing,isusedtogoC.isusedtogo,isusedtogoingD.usedtogo,isusedtogoingD中考链接(2019·贵州安顺)D1.Writeashortpassageabouthowtoprotectourenvironment.2.Previewthenewwordsandexpressions.3.Previewthearticleonpage99.Homework1.WriteashortpassageaboutUnit13We’retryingtosavetheearth!人教版九年级英语下册SectionA3a-3bUnit13人教版九年级英语下册SectionA3a-ObjectivesTohavetheawareness(意识)ofprotectingsharksandrespectingnature.Tounderstandthepassageaboutendangeredanimals—sharks.Tolearntousesomewordsandexpressions.ObjectivesTohavetheawareneInyouropinion,whichanimalsneedtobesaved?WarmingupInyouropinion,whichanimalsFreetalkHaveyoueverseensharks（鲨鱼）?Whydotheyneedtobesaved?FreetalkHaveyoueverseensReadthepassageaboutsharksandcompletethefactsheetbelow.3aSavetheSharks!Manyhaveheardofsharkfinsoup.ThisfamousandexpensivedishisespeciallypopularinsouthernChina.Butdoyourealizethatyou’rekillingawholesharkeachtimeyouenjoyabowlofsharkfinsoup?ReadthepassageaboutsharksWhenpeoplecatchsharks,theycutofftheirfinsandthrowthesharkbackintotheocean.Thisisnotonlycruel,butalsoharmfultotheenvironment.Withoutafin,asharkcannolongerswimandslowlydies.Sharksareatthetopofthefoodchainintheocean’secosystem.Iftheirnumbersdroptoolow,itwillbringdangertoalloceanlife.ManyWhenpeoplecatchsharks,theybelievethatsharkscanneverbeendangeredbecausetheyarethestrongestintheirfoodchain.Butinfact,around70millionsharksarecaughtandtradedinthisindustryeveryyear.Thenumbersofsomekindsofsharkshavefallenbyover90percentinthelast20to30years.believethatsharkscanneverEnvironmentalprotectiongroupsaroundtheworld,suchasWildAidandtheWWF,areteachingthepublicabout“finning”.Theyhaveevenaskedgovernmentstodeveloplawstostopthesaleofsharkfins.Sofar,noscientificstudieshaveshownthatsharkfinsaregoodforhealth,sowhyeatthem?Helpsavethesharks!EnvironmentalprotectiongroupWheresharkfinsoupispopularNumberofsharkscaughtandtradedeveryyearHowgoernmemtcanhelpTwoenvironmentalgroupsagainst“finning”southernChina70milliondeveloplawstostopthesaleofsharkfinsWildAidandtheWWFWheresharkfinsoupispopulaReadthetitle,thefirstandlastsentencesineachparagraphsandmatchthemainideas.Talkaboutsharkfinsoup.Sharksareendangerednow.Appeal(呼吁)topeopleagainsteatingsharkfins.Para.3Para.1Para.2Readthetitle,thefirstandReadParagraph2carefullyandanswerthefollowingquestions1.Ifasharkdoesn’thaveafin,whatwillhappen?2.Ifsharks’numbersdroptoolow,whatwillhappen?3.Whyaresharksendangerednow?ReadParagraph2carefullyandIfasharkdoesn’thaveafin,whatwillhappen?Asharkcannolongerswimandslowlydies.Ifasharkdoesn’thaveafin,Ifsharks’numbersdroptoolow,whatwillhappen?Itwillbringdangertoalloceanlife.Ifsharks’numbersdroptooloWhyaresharksendangerednow?Around70millionsharksarecaughtandtradedinthisindustryeveryyear.Thenumbersofsomekindsofsharkshavefallenbyover90percentinthelast20to30years.Whyaresharksendangerednow?ReadParagraph3andanswerthequestions.1.Whatarethetwoenvironmentalprotectiongroupsdoingtoprotectthesharks?Andwhathavetheydone?a.Theyareteachingthepublicabout“finning”.b.Theyhaveevenaskedgovernmentstodeveloplawstostopthesaleofsharkfins.2.Aresharkfinsgoodforhealth?Why?No,theyaren’t.Becausenoscientificstudieshaveshownthatsharksaregoodforhealth.ReadParagraph3andanswerthSomepeopleliketoeatsharkfinsoup,especiallyin_________China.Butgettingthesharkfinisvery_____.Whenpeoplecatchthesharks,they________theirfinsandthrowthesharksintotheocean.Thesharksslowlydiesbecausetheycan’t_____withoutfins.Anditisalso________totheenvironment.Sharksareatthe___ofthefoodchain.Ifthenumberofsharksdropstoolow,itwillbreakthebalanceofthenature.Pleasesaynotoeatingsharkfinsoup,andtakeactiontosavethesharks!Retellthepassage.southerncruelcutoffswimharmfultopSomepeopleliketoeatshark1.Manypeopledonotrealizetheyarekillingawholeshark_____theyenjoyabowlofshark’sfinsoup.2.Sharksareatthetopofthefoodchain,______iftheirnumbersdrop,theocean’secosystemwillbeindanger.Readthepassageagainandfillintheblankswiththewordsinthebox.soalthoughifbutwhensowhen3b1.ManypeopledonotrealizeManythinkthatsharksaretoostrongtobeendangered,_________theyarewrong._________therearenoscientificstudiestosupportthis,alotofpeoplebelievethatsharkfinsaregoodforhealth.5.Sharksmaydisappearoneday____wedonotdosomethingtostopthesaleofsharkfins.butAlthoughifManythinkthatsharksaretoWhatshouldwedotosavetheanimals?DiscussionWhatshouldwedotosavetheDon’tkillthemDon’tkillthemDon’twearthemDon’twearthemNotradeNomurderNotradeNomurderNotonly+倒装句，butalso…不但……而且……Notonlycanmysisterplaythepiano,butalsoshecanplaytheviolin.我姐姐不但会弹钢琴，还会拉小提琴。LanguagepointsNotonly+倒装句，butalso…LanguagHarmful有害的构成的短语：

beharmfultosb./sth.对某人/某事有害=

doharmtosb.或bebadforsb./sth.Smokingisharmfultoourhealth.=Smokingdoesharmtoourhealth.=Smokingisbadforourhealth。Harmful有害的endangered濒危的；濒危灭绝的Ourgovernmentmustbedonetoprotecttheseendangeredanimals.我们的政府必须采取措施来保护这些濒临灭绝动物。Pandasareendangeredanimal.熊猫是濒危动物。endangered濒危的；濒危灭绝的ExercisesI.根据句意及汉语提示填写单词。1.Thereisnooneto________(支持)him.2.Keepingtheanimalsinthezooisvery________(残酷的)．3.________(鲨鱼)areverysmartanimals.4.Ourgovernmenthasmade________(法律)tostopdriving

afterdrinking.5.Pollutionproblemisbecomingmoreandmoreserious

withthedevelopmentofthe________(工业)．supportcruelSharkslawsindustryExercisesI.根据句意及汉语提示填写单词。suppII.根据句意，用括号中所给词的适当形式填空。1.Hainanisinthe________partofChina.(south)2.Weallsupporthis__________research.(science)3.Thisisan_____________animal.Weshouldtryto

saveit.(danger)4.Smokingis________toyourhealth.Youmustgive

itup.(harm)5.Tomis_____________inourschool.(strong)southernscientificendangeredharmfulthestrongestII.根据句意，用括号中所给词的适当形式填空。southeReviewthepassageyou’velearnedtoday.2.Writeatleast5measurestoprotecttheendangeredanimals.HomeworkReviewthepassageyou’velearUnit13We’retryingtosavetheearth!人教版九年级英语下册SectionAGrammarFocus-4cUnit13人教版九年级英语下册SectionAGra

ObjectivesTolearnaboutThePresentContinuous

Tense,passivevoice,PresentPerfect

andModalVerbs.ObjectivesTolearnaboutTheHaveyouevertakepartinanenvironmentproject?Whatshouldyoudotosavetheenvironment?

①turnoffthelightswhen…②usethepaperbags...③walktoschool...WarmingupHaveyouevertakepartinanWe’retryingtosavetheearth.PresentprogressiveTheriverusedtobesoclean.usedtoTheairisbadlypolluted.PassivevoiceNoscientificstudieshaveshownthatsharkfinsaregoodforhealth.PresentperfectWeshouldhelpsavethesharks.ModalverbsGrammarFocusWe’retryingtosavetheearth现在进行时表示现在或现阶段正在进行或发生的动作。①肯定句:

主语+am/is/are+-ing②否定句:

主语+am/is/are+not+-ing③疑问句:Am/Is/Are+主语+-ingLanguagepoints现在进行时表示现在或现阶段正在进行或发生的动作。Langua现在进行时的用法1.表示说话时正在进行的，目前正在发生的动作。

常带有表示目前时刻的时间状语如：now,atthe(very)moment,forthetimebeing,atpresent,及Look!Listen!...①Look!Thebigbirdisflyingaway.

看，那只大鸟正在飞走。②Heiswatchingamovienow.

他现在正在看电影。现在进行时的用法2.表示目前一段时间内正在进行，但说话时可能没有进行的动作。RightnowIamstudyingChinesebydistancelearning.

我现在正通过远程教育学习汉语。

2.表示目前一段时间内正在进行，但说话时3.与always,constantly,forever,allthetime等副

词连用，表示动作反复或习惯。此时句子常

含有说话者的强烈情感在内。表达较强的

“责备”或“表扬”之意。①Youarealwayschangingyourmind.

你总是主意不定。(太烦人了。)②Heisalwayshelpingothers.

他总是帮助别人。(他真是个好人。)

3.与always,constantly,foreve4.对于come,go,leave,arrive,start等表示位置移动的动词常可用进行时态表将来。①HeisleavingonWednesday.他将于周三离开。

②Maryisn’thereatthemoment.Sheis

coming

later.

玛丽现在不在这儿，她一会儿来。4.对于come,go,leave,arrive,s用括号内所给动词的适当形式填空。Listen!Thephone__________(ring).Pleasegoto

answerit.2.—Alan,it’slate.Whynotgotobed?—Jennyhasn’tcomebackyet.I___________

(wait)forher.3.—What’syourfatherdoingnow?—He__________(write)aletterinthestudy.isringingamwaitingiswriting用括号内所给动词的适当形式填空。isringingamwWhatafinedaytoday!Look!Whataretheydoing?

GroupdiscussionWhatafinedaytoday!Groupusedtodosth.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Iusedtogetupatsixo’clock.我以前六点钟起床。Joeisusedtodrinkingacupofcoffeeeverymorning.乔习惯每天早晨喝一杯咖啡。usedtodo&beusedtodoingusedtodosth.表示过去常常做某事，而现在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.Translation.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

Anewschoolwasbuiltlastyear.

Ourclassroomiscleanedeveryday.被动语态：Passivevoice定义：表示主语是动作的承

①一般现在时的被动语态：am/is/are+V-edThefirstsectionofNewCollegeEnglishisdesignedforspeakingpracticeandisbasedonpicturesandtopics.

②一般过去时的被动语态：was/were+V-edThesecomputersweremadeinourowncountrylastyear.③一般将来时的被动语态：will/shall+be+V-edShallwebeaskedtoattendtheopeningceremony?

①一般现在时的被动语态：am/is/are+V-ed1.有些动词可以有两个宾语，直接宾语与间接宾语。一些特殊的被动语态Theydidn’tofferAnnthejob.Annwasn’tofferedthejob.间接宾语直接宾语主语(2)直接宾语做主语，需在间接宾语前加to或者for.在变为被动语态时:Thejobwasn’tofferedtoAnn.主语Shemademeacake.(1)间接宾语(通常指人)做主语，直接宾语依然保留在谓语后边。Acakewasmadeforme.主语1.有些动词可以有两个宾语，直接宾语与间接宾语。一些特殊的被2.在使役动词have,make,get以及感官动词see,watch,notice,hear,feel,observe等后面不定式作宾语补语时，在主动结构中不定式to要省略，但变为被动结构时，要加to。Theymakehercleanthefloor.Sheismade

toclean

thefloorbythem.2.在使役动词have,make,get以及感官动词s3.It+be+V-ed+that从句=主语+be+V-ed+todosth.表示:据说/据报道/据悉/据信等……Itissaidthattheboyhaspassedthenationalexam.Theboyissaidtohavepassedthenationalexam.据说这个男孩已经通过了这次全国性的测试。3.It+be+V-ed+that从句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.Thedishtastesdelicious.Thetheoryprovedrightatlast.Thebookissointerestingthatitsellswell.Thepenwriteswell.不可以变成被动语态的情况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2.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).3.通常只有及物动词（组）才有被动语态，不及物动词没有。战争爆发了。Thewarbrokeout.但不能说：Thewarwasbrokenout.2.need做实意动词时，need+V-ing主动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.【运用】Translatethesentencesbyusi用括号内所给动词的适当形式填空。1.TheSecondarySchoolEntranceExam

_______(hold)inJune.2.Astrangenoise__________(hear)byhismotherlastnight.3.Awideroad_____________(build)betweenthetwovillagesbythosepeoplenextyear.isheldwasheardwillbebuilt用括号内所给动词的适当形式填空。1.TheSeconda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。标志词：already,yet,ever,never,since,for…Ihaven’tfinishedmyhomeworkyet.

现在完成时:PresentPerfect定义：表示动作已经完成,但对现在造成影响；或者表示从过去某肯定句：主语+have/has+V-ed+其他否定句：主语+haven’t/hasn’t+V-ed+其他一般疑问句：Have/Has+主语+V-ed+…？肯定答语：Yes,主格代词+have/has.否定答语：No,主格代词+haven’t/hasn’t.现在完成时—构成肯定句：主语+have/has+V-ed+其Completethefollowingsentences.I_________(be)inBeijingfortwoyears.2.I_____never_____(hear)ofthatmanbefore.3.Tom________________(work)theresincetwoyearsago.havebeenhaveheardhasworkedCompletethefollowingsentenc4.Thetwins_____________(wash)theclothes

foranhour.5.He___________(play)basketballsincethreeyearsago.6.Howlong______Sally_______(sing)yet?havewashedhasplayedhassung4.Thetwins_____________(wa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。情态动词情态动词本身有一定的词义,表示说话人的情绪、情态动词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。Kencanclimbupthetreeslikeakoala.Tracycouldrideabicyclewhenshewasfiveyearsold.Youmustn’tplaywithfire.Itisdangerous.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.Translation.Wecan’teatinthJoe:__________youever__________(take)part

inanenvironmentalproject?Ken:Yes,Ihave.I_____(help)withaClean-UpDaylastyear.Itwas________________

(consider)thebiggestclean-upprojectthis

city______ever______(have).Joe:Howmanypeople__________(take)part?Havetakenhelpconsideredtobehadhadhavetaken4aFillintheblankswiththecorrectformsoftheverbsinbrackets.Joe:__________youever_____Ken:I__________(think)morethan1,000people_________(come)tohelpout.Joe:That’sfantastic!Iguesseveryoneinthiscityis_______(try)toimprovetheenvironment.Ken:Yes,wecan’taffordto___________(wait)

anylongertotakeaction!thinkhavecometryingwaitingKen:I__________(think)morePeople______thinkthatbigthings______bedonetosavetheearth.Manyforgetthatsavingtheearthbeginswithsmallthings.Forexample,you_______saveelectricitybyturningoffthelightswhenyouleavearoom.You_______alsousereusablebagsinsteadofplasticbags.canwouldcouldhavetoshouldmustmay/mightmaymustcouldcouldFillintheblankswiththeappropriatemodalverbsfromthebox.4bPeople______thinkthatbigthiIthinkit’sagreatideathatyounow______payforplasticbagsinsomestores.Andinsteadofdrivingtoschoolorwork,you_________rideyourbikeorwalk.Ifit’sfar,you________takethebus.Allthesesmallthings________addupandbecomebigthingsthat_________improvetheenvironment.Let’stakeactionsnow!havetocancanwouldshouldcan

wouldcouldhaveto

should

mustmay/mightIthinkit’sagreatideathatMakealistofthingsthatpeoplecandotohelptheenvironmentanddiscussyourlistwithyourpartner.usepublictransportation(n.交通运输);turnoffthelightswhenyouleavearoom;usereusablebagsinsteadofplasticbags;rideyourbikeorwalktoschoolorwork;stopusingpapernapkins(餐巾纸);recyclebooksandpaper...4cMakealistofthingsthatpeoDiscussing...usepublictransportationtakeyourownshoppingbagswhengoshoppingreducetheuseofairconditionersinsummerturnoffthelightswhenyouleavetheroomgrowmoreplants...Discussing...usepublictranspA:Ithinkthateveryoneshouldtakeyourownshoppingbagswhengoshopping.B:Iagree.it'sgoodfortheenvironment.A:IthinkthateveryoneshoulA:Ithinkthateveryoneshouldreducetheuseofairconditionersinsummer.B:Idisagree.Thesummerissohot,especiallyinsourthChina.Withoutair-conditioners,peoplemaynothavethepatiencetowork.

A:IthinkthateveryoneshoulA:Ithinkthateveryoneshouldturnoffthelightswhenyouleavetheroom.B:Iagree.It'sgoodtosaveenergyresources.A:IthinkthateveryoneshoulA: