Unit+13+Section+AGrammar~4c 人教版英语九年级全册

Unit13We'retryingtosavetheearth!PeriodFourSectionA（Grammar-4c)ObjectiveTolearnaboutThePresentprogressive,passivevoice,PresentPerfectandModalVerbstakepartinafford

turnoffreusablepayfortakeactiontransportation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WordsReviewGrammarFocusWe’retryingtosavetheearth.PresentprogressiveTheriverusedtobesoclean.usedtoTheairisbadlypolluted.PassivevoiceNoscientificstudieshaveshownthatsharkfinsaregoodforhealth.PresentperfectWeshouldhelpsavethesharks.Modalverbs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。1)与always,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。)

现在进行时--用法2)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。Whatafinedaytoday!Look!Whataretheydoing?Exercise用括号内所给动词的适当形式填空。Listen!Thephone__________(ring).Pleasegotoanswerit.—Alan,it’slate.Whynotgotobed?—Jennyhasn’tcomebackyet.I___________(wait)forher.3.—What’syourfatherdoingnow?—He__________(write)aletterinthestudy.isringingamwaitingiswritingusedtodosth.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。

2.他习惯于每天晚上熬夜。

ExerciseSheusedtohangoutwithfriendsonweekends.Heisusedtostayingupeverynight.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+过去分词

②一般过去时的被动语态：was/were+过去分词③一般将来时的被动语态：will/shall+be+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用括号内所给动词的适当形式填空。1.TheSecondarySchoolEntranceExams_______(hold)inJune.2.Astrangenoise__________(hear)byhismotherlastnight.3.Awideroad_____________(build)betweenthetwovillagesbythosepeoplenextyear.isheldwasheardwillbebuilt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.4.Thetwins___________(wash)theclothesforanhour.5.He_________(play)basketballsincethreeyearsago.6.Howlong____Sally_____(sing)yet?havebeenhaveheardhasworkedExercisehavewashedhasplayedhassung1.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。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.Kencanclimbupthetreeslikeakoala.Tracycouldrideabicyclewhenshewasfiveyearsold.Youmustn’tplaywithfire.Itisdangerous.情态动词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.4aFillintheblankswiththecorrectformsoftheverbsinbrackets.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’taffordto____(wait)anylongertotakeaction!tookthinkcametryingwaitv.承担得起(后果);买得起electricitybyturningoffthelightswhenyouleavearoom.You______alsousereusablebagsinsteadofplasticbags.Ithinkit’sagreatideathatyounow______payforplasticbagsinsomestores.Andinsteadofdrivingtoschoolorwork,you__________rideyourbikeorwalk.Ifit’sfar,you__________takethebus.Allthese

couldhavetocan/shouldcan/could关掉adj.可重复使用的付费;付出代价smallthings______addupandbecomebigthingsthat_________improvetheenvironment.Let’stakeactionnow!couldwould/can采取行动4cMakealistofthingsthatpeople