Unit13SectionA（Grammar-Focus4c）课件人教版九年级英语全册

Unit13We’retryingtosavetheearth！SectionA（GrammarFocus-4c）Talkaboutenvironmentalproblemsyouseeandyoursuggestionstosolvethem,usethewordsinblankstohelpyou.factoriesgiveoutharmfulgasesreducecutdownweshould…wecan…It’sbetterto…ask…forhelpTocutdowntheairpollutionfromthefactories,weshouldaskthegovernmentforhelp.Toreducetheplasticwaste,wecanuseclothbagsinstead.Tokeeptheriverscleanandbeautiful,it’sbettertosetupanorganizationtomaintainthem.maintainv.维持；保养We’retryingtosavetheearth,whatareyourideastoprotecttheenvironment?UsefulwordsStructuresLitter,advantage,recycle,putsth.togooduse,takepartin,takeactions,cutdown,bringback,pulldown,makeadifference,worktogether现在进行时Usedto被动语态现在完成时情态动词Let’ssummarizeGrammarFocusWe’re

tryingtosavetheearth.PresentprogressiveTheriverusedtobesoclean.usedtoTheairisbadlypolluted.PassivevoiceNoscientificstudieshaveshownthatsharkfinsaregoodforhealth.PresentperfectWeshouldhelpsavethesharks.Modalverbs现在进行时:PresentProgressive结构:标志词：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。look,listen,now,atthe(very)moment,rightnow,forthetimebeing,atpresent,…be(am/is/are)+v.-ing1看，那只大鸟正在飞走。我现在正通过远程教育学习汉语。

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。表示说话时正在进行的动作。例例Look!Thebigbirdisflyingaway.RightnowIamstudyingChinesebydistancelearning.

他总是帮助别人。(他真是个好人。)

他将于周三离开。

表示位置移动的动词常可用进行时态表将来。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。例例HeisalwayshelpingothersHeisleavingonWednesday.usedtodosth.

usedtodo&beusedtodoing我以前六点钟起床。例乔习惯每天早晨喝一杯咖啡。例beusedtodoingsth.表示过去常常做某事，而现在往往不做了，后接动词原形表示习惯于做某事Iusedtogetupatsixo’clock.Joeisusedtodrinkingacupofcoffeeeverymorning.2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。被动语态：Passivevoice结构：be+过去分词

例我们的教室每天都被打扫。Ourclassroomiscleanedeveryday.①一般现在时的被动语态：am/is/are+done

3例②一般过去时的被动语态：was/were+done去年建了一所新的学校。Anewschoolwasbuiltlastyear.例③一般将来时的被动语态：will/shall+be+done下周会开个会议。Ameetingwillbeheldnextweek.现在完成时:PresentPerfect标志词：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。结构：has/have+过去分词already,yet,ever,never,since,for…例这个地方已经变了许多吗?Hastheplacechangedalotyet?4情态动词51.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。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。

例小孩禁止玩火，太危险了。Shecouldreadabookbyherselfwhenshewasfouryearsold.她四岁的时候就能独自读一本书了。Childrenmustn’tplaywithfire.Itisdangerous.例Fillintheblankswiththecorrectformsoftheverbsinbrackets.4aJoe:______youever_______(take)partinanenvironmentalproject?Ken:Yes,Ihave.I_____(help)withaClean-UpDaylastyear.Itwas________________(consider)thebiggestclean-upprojectthiscity_____ever_____(have).Joe:Howmanypeople___________(take)part?HavetakenhelpconsideredtobehadhadhavetakenKen:I______(think)morethan1,000people___________(come)tohelpout.Joe:That’sfantastic!Iguesseveryoneinthiscityis______(try)toimprovetheenvironment.Ken:Yes,wecan’taffordto_______(wait)anylongertotakeaction!thinkhavecometryingwaitingFillintheblankswiththeappropriatemodalverbsfromthebox.4bcanwouldcouldhavetoshouldmustmay/mightPeople______thinkthatbigthings______bedonetosavetheearth.Manyforgetthatsavingtheearthbeginswithsmallthings.Forexample,you_______saveelectricitybyturningoffthelightswhenyouleavearoom.You_______alsousereusablebagsinsteadofplasticbags.maymustcouldcouldIthinkit’sagreatideathatyounow_______payforplasticbagsinsomestores.Andinsteadofdrivingtoschoolorwork,you_______rideyourbikeorwalk.Ifit’sfar,you________takethebus.Allthesesmallthings______addupandbecomebigthingsthat_______improvetheenvironment.Let’stakeactionsnow!havetocancanwouldshouldMakealistofthingsthatpeoplecandotohelptheenvironmentanddiscussyourlistwithyourpartner.4cusepublictransportation(n.交通运输);turnoffthelightswhenyouleavearoom;usereusablebagsinsteadofplasticbags;rideyourbikeorwalktoschoolorwork;stopusingpapernapkins(餐巾纸);recyclebooksandpaper...A:Ithinkthateveryoneshouldtakeyourownshoppingbagswhengoshopping.B:Iagree.It'sgoodfortheenvironment.Makeaconversationabouttheactionswecantaketoprotecttheenvironment.ExercisesⅠ.选择正确的形式填空。1.Nick____________(offer)ajobinabank,buttooursurprise,hedidn’ttakeit.2.—HaveyouheardoftheEarthDay?—Yes.ThefirstEarthDay______________(celebrate)in1970toeducateustoprotectourplanet.3.—Excuseme,whosebookisthis?—It______(must)beJohn’s.Ithashisnameonit.wasofferedwascelebratedmust4.Don’tmakesomu