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Thereisacageinthepicture.acageThecageisbeautiful.asnakealionatigeragiraffeanegganumbrellaanorangeanEnglishbook1.第一次提到某人或某物时。Ihaveabook.2.泛指某一类的人或物。Apandaisverylovely.判断一个单词用a还是用an，是根据其读音，而不是根据其首字母。以元音音素开头的词前用“an”，以辅音音素开头的词前”a“。如：anhour,anapple,anelephant,ausefulbook等。Look!Hereisapanda.Thepandaiseatingbamboo.Look!Hereisanapple.Theappleisred.小试身手：用a或an填空___lion___bird___orange___“L”___giraffe___oldman___“u”___umbrella___interestingbook___hour___honestboyaaanananananaaan注意：an是放于元音音素前，而不是元音字母前。an•特殊词：•ausualboy;ausefulbook;•auniversity;aone–legdog•anuncle;anumbrella•anhonestboy;anhour;•字母前用an“a,e,i,o,f,h,l,m,n,r,s,x”1.指上文提到过的人或物。如：Lucyboughtanewbike,thebikeisgreen.2.世界上独一无二的事物。如：thesunthemoon3.谈话双方都知道的人或事物。如：Openthedoor,please.4.序数词和形容词最高级前。如：Sheisalwaysthefirsttogettoschool.5.乐器名词前用。如：playthepianoplaytheviolin6.定冠词与形容词连用表示一类人，加在姓氏的复数形式前表示“全家人”或“夫妇”。如：therich有钱人theyoung年青人theRreens格林一家7.某些专用名词和习惯用语中用定冠词。theGreatWallbytheway8.用在方位名词前ontheleft/right小试身手：用适当的冠词填空，为什么？1.Weliveon___thirdfloorofthetallbuilding.2.____WhitesarepreparingforthecomingThanksgivingDay.3.Mycousin,Amy,likeplaying____violin.4.___earthgoesaround____sun.5.Ibelieveyouare____bestsinger.6.____richshouldtrytheirbesttohelp____poor.ThethethethetheThetheThe序数词前用于姓氏复数形式前，表示某一家人乐器前世界上独一无二的事物形容词最高级前某些形容词前，表示某一类人1.名词前已经有指示代词（this,that,these,those）、形容词性物主代词（my,his,our…）或名词所有格等限定词。2.表示语言、学科、三餐、球类运动、棋类运动的名词前。3.在不可数名词前。3.表示星期、月份、季节、某些节日的名词前。4.表示人名、国名、称呼语或头衔等专有名词前。5.某些固定短语中。bybike,bybus,atfirst,atwork,onfoot,gotoschool,gotobed,等。Practice：Fillintheblankswitha,anorthe.1.---Icansee___kiteoverthere.---Whereis____kite?Ican’tseeit.2.---Isthere___librarynearhere?---Yes.____libraryisjustnexttoourclassroom.3.Ihave___apple.It’sinmybag.Canyousee____apple?4.Thereis_____cinemainGreenStreet.I'llwatch___filmin_____cinema.aaanaaThethethetheMillie:Let’sgotothePandaHousefirst.Daniel:Hereweare.Icansee(1)___pandathere.It’slyingonthegrass.Millie:Howcute!Ilovepandas.Look!There’s(2)____babypanda.It’ssosmall.aaDaniel:Yes.(3)_____babypandadoesn’tlooklikeitsmother.Millie:Nowlet’sgotoseesomelions.Daniel:Are(4)___lionsin(5)___openarea?Millie:No,theyaren’t.Theyarein(6)___verybigcage.theanaDaniel:Isee.(Halfanhourlater)Daniel:Millie,here’s(7)____bridge.Whatcanyouseeacrossit?Millie:Oh,(8)____elephantisstandingoverthere.Daniel:Let’sgoacross(9)____bridgeandsee(10)____elephant.aanthethe在必要的地方用a,an,the填空。1.WhereisPeter?Heisn’tat___school.2.Thereis___orangeinthefridge.3.____pencilonthedeskbelongstoSandy.4.Ihave__newbike.Iclean___bikeeveryday.anTheathe×5.Dadoftengoesfishingin____summer.6.A:CanIhelpyou?B:I’mlookingfor___pairofshoes.7.PeopleinNanjingnowgotoworkby______underground.8.Whoisgoodatplaying______footballinyourclass?9._____boyinaredcoatismycousin.×a××The10.Iliveon____thirdfloor.11.Thereis___“h”,___“o”,___“u”intheword“hour”.12.Simonlikestoplay____pianobuthedoesn’tliketoplay___basketball.13.Beijingis____capitalofChina.thethethe×aananinsideoutsideonover/aboveinfrontofbehindontheleftofontherightofunder/belowPrepositionsoftheplace(方位介词)over在……的正上方under在……的正下方above在……的上方(表面不接触)below在……的下方on在……的上面(表面接触)overunderabovebelowonDoyouknowthesewords?Let’slearnthemtogether.Canyoufillintheblankswiththeseprepositions.1.Thereisaface_____thedesk.2.Themoonis______thedesk.3.Thesunis______thedesk.4.Icanseeastar______thedesk.5.Thereisatree____thedesk.deskoveraboveunderbelowonover－underabove－belowinside－outsideinfrontof－behindontheleft(of)－ontheright(of)nextto=beside,inthemiddleof,inthecentreofin,on,at,opposite,near,between…and...,inthefrontof表示方位的介词Theflowerareinfrontoftheshop.Thetreesarebehindtheshop.Theshopkeeperisinsidetheshop.Theboyisoutsidetheshop.Thefoodisabovethedrinks.Thedrinksarebelowthefood.Thesignisoverthebench.Thedogisunderthebench.There’sabeautifullakeinthepark.Look!Twoboysarerowingaboat(1)___thelake.(2)_______thelakethere’safootballfield.Someboysareplayingfootball(3)____it.BesideIntheparkonon(4)__________thefootballfield,therearetwotrees.Ontheleft,abirdissinging.(5)____onetree.Ontheright,twoboysaresitting(6)______theothertree.(7)________thetwotrees,threegirlsarechatting(8)_____thebench.InfrontofBetweeninunderon1.Thefootballis______thedoor,soIcan’tseeit.2.Don’tstand__________us,orwecan’tseethefilmclearly.3.Thereisanelectricfan_____thedesk.4.Look!Yourrubberis_____thechair.Pickitup.5.Themoonisnow_____thetrees.behindinfrontofaboveunderabove练一练：填入适当的介词使句子通顺。6.Eddiedoesn’twanttolive__thepalace.7.Stephenischattingwithhisfriends___thebalcony.8.LiMingismyneighbour.Hishouseis_____________mine.9.ThePalaceMuseumisinthe______ofBeijing.10.“KittysitsontherightofSandy”.ItmeansSandysitsonKitty’s____.inoncentreleftbeside/nextto1.Rememberthenewwordsinthislesson.2.Dotheexercisesontheworkbook.