Unit13课时3SestionAGrammarFocus-4b课件人教版（2012）九年级英语全册

2.Whosebirthdayisit?

Unit13We'retryingtosavetheearth!SectionA(GrammarFocus-4b)新目标英语（九年级）2.Whosebirthdayisit?语言能力学习能力思维品质文化意识1234学习目标掌握下列词汇：takepartin,afford,turnoff,reusable,payfor,takeaction,transportation掌握句型：Wecan’taffordtowaitanylongertotakeaction!Haveyouevertakenpartinanenvironmentalproject?

能够在听说活动中掌握写作技能，培养学生的结构性思维和逻辑性思维。能运用目标语言谈论污染问题，能在实际情景对话中认识解决空气污染和垃圾污染的方法。

通过了解谓语动词解题思路，能够复习现在进行时、现在完成时、情态动词、被动语态、usedto的表意功能和用法。

GrammarFocusReadthesentencesandtranslatethem.We’retryingtosavetheearth.PresentprogressiveTheriverusedtobesoclean.usedtoTheairisbadlypolluted.PassivevoiceNoscientificstudieshaveshownthatsharkfinsaregoodforhealth.PresentperfectWeshouldhelpsavethesharks.ModalverbsWe’retryingtosavetheearth.PresentprogressiveTheriverusedtobesoclean.usedtoTheairisbadlypolluted.PassivevoiceNoscientificstudieshaveshownthatsharkfinsaregoodforhealth.PresentperfectWeshouldhelpsavethesharks.Modalverbs探究：现在进行时的结构和用法定义：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。现在进行时的结构和用法定义：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。Theyareplayingbasketballnow.Tomisworkingonanewbookaboutstories.正在发生目前一段时间内正在进行谓语构成：Be(am\is\are)＋v-ing(动词的现在分词)It’salwaysraininghere.说话者的强烈情感（抱怨情绪Whyareyoualways

cominglateforclass?含说话者的强烈情感Heiswatchingamovienow.IamstudyingChineseontheInternetthesedays.Factories

areputtingwasteintotheriver.现在进行时的结构和用法句式变化：①肯定句:

主语+am/is/are+v-ing②否定句:

主语+am/is/are+not+v-ing③疑问句:Am/Is/Are+主语

+v-ing?Isshereadingabooknow?Sheisnotreadingabooknow.Sheisreadingabooknow.v.-ing形式(现在分词)的构成：a.一般情况下，在动词词尾后加-ing。如：go→going。b.以不发音的e结尾的动词，去掉e加-ing。如：have→having。c.以重读闭音节结尾的动词，末尾只有一个辅音字母，双写这个辅音字母，再加-ing。如：run→running。现在进行时的结构和用法标志性词汇：now,rightnow,look,listen,thesedays,atthemoment,atpresentLook!Theboyiscrying.Listen!Theboyissinging.Heiswatchingamovienow.具体用法：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。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。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。)4.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.Sheiscominglater.玛丽现在不在这儿，她一会儿来。Practice1.Look!Someoldpeople________inthepark.A.sings B.sing C.aresinging2.—Don’tmakenoise!Thechildren________online.—Sorry,Iwon’t.A.studies B.arestudyingC.studied D.werestudying3.—Peter,whatareyoudoing?—Oh,I________areportaboutnationalheroes.A.willwrite B.amwriting C.wrote D.havewrittenWe’retryingtosavetheearth.PresentprogressiveTheriverusedtobesoclean.usedtoTheairisbadlypolluted.PassivevoiceNoscientificstudieshaveshownthatsharkfinsaregoodforhealth.PresentperfectWeshouldhelpsavethesharks.Modalverbs探究：usedto的结构和用法Theriverusedtobeclean.Didtheriverusetobeclean?Theriverdidn’tusetobeclean.Yes,itdid./No,itdidn’t.1.结构usedtodosthdidn’tusetodosthDid...usetodosth?Yes,...did./No,...didn’t.usedtodosth过去常常做某事，现在没做了。usenottodosthUsed...todosth?beusedtodoingsth习惯于做某事。beusedtodosth被用于做某事。Practice1.Youused_________(go)toschoolbybike，didn'tyou?2.我习惯于晚饭后打篮球。I_________________basketballafterdinner.3.这种小刀是用来切东西的。Thiskindofknife________________things.4.Heusedtospendmuchtimeplayingcomputergames.（改一般疑问句）____________________muchtimeplayingcomputergames?togoamusedtoplayingareusedtocutDidheusetospendWe’retryingtosavetheearth.PresentprogressiveTheriverusedtobesoclean.usedtoTheairisbadlypolluted.PassivevoiceNoscientificstudieshaveshownthatsharkfinsaregoodforhealth.PresentperfectWeshouldhelpsavethesharks.Modalverbs探究：被动语态的结构和用法1.定义：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，即行为动作的对象。2.结构：be+过去分词e.g.Anewschoolwasbuiltlastyear.Ourclassroomiscleanedeveryday.被动语态的结构和用法3.主动语态如何变为被动语态小口诀：宾变主，主变by+宾，谓语动词用被动（be+done）,其他成分不变。①①②③Icleanedmyroom.→Myroomwascleanedbyme.主动语态中有些感官动词（如hear,see,watch,notice等）和使役动词（如make,let等）后用不带to的不定式作宾语补足语，变为被动语态时，要把不定式符号to还原。Isawhimcrosstheroadandentertheshop.→Hewasseentocrosstheroadandentertheshop.5.各种时态的被动语态谓语构成不同时态的被动语态结构(以动词do为例):一般现在时:am/is/are+done一般过去时:was/were+done一般将来时:willbe/is(/am/are)goingtobe+done含情态动词:can/may/must...+be+done被动语态的基本结构：助动词be+及物动词的过去分词TheSecondarySchoolEntranceExam_______(hold)inJune.isheldAstrangenoise__________(hear)byhismotherlastnight.washeardAwideroad_____________(build)betweenthetwovillageswillbebuiltActionsshould_________(take)toprotecttheearth.betakena.讲话者不知道动作的执行者，不必或不便说出动作的执行者（这时可

省掉by引导的短语）;b.借助被动的动作突出动作的承受者Anewschoolwasbuiltlastyear.TeaplantsaregrowninSouthChina.4.被动语态用法:

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.4.Actionsshould______________(take)toprotecttheearth.isheldwasheardwillbebuiltbetaken一般现在时一般过去时一般将来时情态动词PracticeWe’retryingtosavetheearth.PresentprogressiveTheriverusedtobesoclean.usedtoTheairisbadlypolluted.PassivevoiceNoscientificstudieshaveshownthatsharkfinsaregoodforhealth.PresentperfectWeshouldhelpsavethesharks.Modalverbs探究：现在完成时的结构和用法现在完成时构成现在完成时have/has+过去分词现在完成时含义①表示过去发生的事情对现在造成的影响。②表示从过去某一时间开始一直持续到现在，并还有可能继续下去的动作。标志性词already,yet,ever,never,just,before,once,sofar,recently,for,since.写出下面动词的过去分词。1.clean_______2.live_______3.study_______4.plan_______5.put________6.begin_______7.teach________8.get_______9.drive_______10.see_______cleanedlivedstudiedplannedputbeguntaughtgotdrivenseen过去分词的规则变化1.一般情况下，直接+ed。2.以字母e结尾的，直接＋d。4.以重读闭音节结尾，且末尾只有一个辅音字母的，

双写这个辅音字母再加+ed。3.以辅音字母+y结尾的，将y改为i再加＋ed。过去分词Practice1.Inthepastfewyears,greatchanges__________(take)placeinLianyungang.2.I___________(notread)thebookLittleWomenyet,butI'llletyoureaditfirst.3.He____________(notcome)yet.Whatdoyouthinkhashappenedtohim?4.They__________________(marry)forfiftyyears.5.Linda_____________(live)heresinceshewasfiveyearsold.hastakenhaven’treadhasn’tcomehavebeenmarriedhaslivedfor+一段时间since+过去时间点/从句（一般过去时）6.I_______totheWestLakefourtimes,butIwillgothereagainthissummer.A．havegoneB．havebeenC．hadgone7.—WhereisMr.Brown?—He________Australia.He________therelastyear.A．hasbeento;hasbeenB．hasbeento;hasgoneC．hasgoneto;went8.I_______Shijiazhuangforthreeyears.A.havebeentoB.havebeeninC.havegonetohave/hasbeento

去过某地，已经回来了。have/hasgoneto去了某地，还未回来have/hasbeenin在某地多长时间We’retryingtosavetheearth.PresentprogressiveTheriverusedtobesoclean.usedtoTheairisbadlypolluted.PassivevoiceNoscientificstudieshaveshownthatsharkfinsaregoodforhealth.PresentperfectWeshouldhelpsavethesharks.Modalverbs探究：情态动词的结构和用法Everyoneshouldtakepartinsavingtheearth.Hecan’tplaytheguitar.Theymayhavefinishedthetasklastmonth.情态动词1.情态动词+动词原形2.情态动词没有人称和数的变化。3.常用的情态动词有：can/could,may/might,must/haveto,should/oughtto,would,need

等。Practice1.—Couldyouplaythepianoattheageoffive?—No,I______.Istartedatsix.A.can’tB.shouldn’tC.needn’tD.couldn’t2.—MustIreturnthisbookbeforeFriday,Sir?—No,you________,dear.Youcankeepitfortwoweeks.A.can’tB.shouldn’tC.mustn’tD.needn’t3.—HowlongcanIkeepthesebooks?—Accordingtothelibraryrules,you________returnthemwithin7days.A.mustB.mightC.couldD.will4.—You________takephotoshere!Lookatthesign.Itsays“Nophotos”. —Sorry,Iwon’t. A.must B.need C.mustn’t D.needn’t4aFillintheblankswiththecorrectformsoftheverbsinbrackets.Joe:_____youever_____(take)partinanenvironmentalproject?Ken:Yes,Ihave.I_______(help)withaClean-UpDaylastyear.Itwas__________(consider)thebiggestclean-upprojectthiscity______ever________(have).Joe:Howmanypeople________(take)part?Ken:I___________(think)morethan1,000people______(come)tohelpout.Joe:That’sfantastic!Iguesseveryoneinthiscityis______(try)toimprovetheenvironment.Ken:Yes,wecan’taffordto________(wait)anylongertotakeaction!Havetakenhelpedconsideredhadhadtookthinkcametryingwaittakepartinsth/doingsth参加affordtodosth负担得起takeaction采取行动People_________thinkthatbigthings__________________bedonetosavetheearth.Manyforgetthatsavingtheearthbeginswithsmallthings.Forexample,you______________saveelectricitybyturningoffthelightswhenyouleavearoom.You_______________alsousereusablebagsinsteadofplasticbags.Fillintheblankswiththeappropriatemodalverbsfromthebox.canwouldcouldhavetoshouldmustmay/might4bmay/mightshould/haveto/mustcan/could/shouldcan/could/shouldbeginwith开始于turnoff关闭reusable可重复使用的canwouldcouldhavetoshouldmustmay/mightIthinkit’sagreatideathatyounow_______payforplasticbagsinsomestores.Andinsteadofdrivingtoschoolorwork,you_______________rideyourbikeorwalk.Ifit’sfar,you__________takethebus.Allthesesmallthings__________addupandbecomebigthingsthat______________improvetheenvironment.Let’stakeactionnow!havetocan/could/shouldcan/couldcan/could

would/can/couldpayfor付费；付出代价addup合计；加起来Makealistofthingsthatpeoplecandotohelptheenvironmentanddiscussyourlistwithyourpartner.4cIthinkthateveryoneshouldusepublictransportation.Idisagree.It’sdifficultforparentswithyoungchildrentousepublictransportation...________________________________________________________usepublictransport