Unit3Languageinuse【教學(xué)目標(biāo)】TousethepointsinUnits1and2;Tousethepointsinunits1and2freely;TomakeSslearnabouttheenvironmentpollutionandhowtoprotecttheenvironment.【教學(xué)重點(diǎn)】Tomastertheword,thenumbersandthearticle.【教學(xué)難點(diǎn)】Theusingofthenumberandthearticle.【教學(xué)方法】PWPmethod,Formalandinteractivepractice【教學(xué)手段】Ataperecorder,multimediaandsomepictures【教學(xué)過程】TeachingProcedures:Step1LanguagepracticeTomasterthestructureofthegrammar1.That’sahugenumber.2.ThesmalllocalschoolinParkvillecloseddownfiveyearsago,andgettingtothenearestschoolinArnwicktakesheranhourbybus.Grammar:冠詞冠詞是置于名詞之前，用以說明名詞所指的人或事物的一種虛詞。冠詞有三種形式：不定冠詞a,an,定冠the和零冠詞。一、不定冠詞a,an的用法1.表示數(shù)量，泛指同類事物中的“任何一個(gè)”，含有“一”的意思。如：Tomhadanappleforbreakfastthismorning.2.表示某類人或物，此時(shí)的不定冠詞一般不譯為“一”。如：Apandaeatsbamboo.3.表示數(shù)量，意為“每一”。如：Howoftendoyougoswimmingaweek?4.用于某些抽象名詞前，表示“一種；一場；一陣等”。如：Ihaveaheadache.注：不定冠詞a常用于以輔音音素開頭的單數(shù)可數(shù)名詞前；an常用于以元音音素開頭的單數(shù)可數(shù)名詞前。

二、定冠詞the的用法1.特指某（些）人或物。如：Iliketheredclothes.2.特指上文提到過的人或物。如：Ihaveacamera.ThecameraiswhiteandIlikeitverymuch.3.指世界上獨(dú)一無二的事物。如：thesun,themoon,theearth4.用于序數(shù)詞、表示方位的名詞或形容詞最高級前面。如：thefirstboy,inthenorth,thetallestboy5.用于表示樂器的名詞前面。如：playthepiano6.用于姓氏的復(fù)數(shù)形式前面，表示“一家人”或“夫婦倆人”。如：TheBlacksarehavingapicnicnow.7.與形容詞連用,表示某一類人或物。如：therich,theold8.用于某些專有名詞前面。如：theGreatWall9.用于一些固定短語中。如：inthemorning,bytheway三、零冠詞的用法1.表示節(jié)日、星期、月份、季節(jié)等的名詞前面一般不加冠詞。如：onTeachers’Day,onMonday,inSeptember,inwinter注意：inthesummerof2015（表示特指，故加the）2.表示一日三餐的名詞前面一般不加冠詞。如：havelunch3.表示球類運(yùn)動(dòng)和棋類的名詞與play連用時(shí)，一般不加冠詞。如：playbasketball,playchess4.表示語言和學(xué)科的名詞前面一般不加冠詞。如：DavidcanspeakChineseverywell.HistoryisSusan’sfavouritesubject.5.名詞前面有指示代詞或形容詞性物主代詞時(shí)，不再加冠詞。如：MayIhavealookatyourdictionary?

6.在一些固定短語中，名詞前面用零冠詞。如：gotobed,gotoschool,bybus,atnightStep2MatchthecountrieswiththeirpopulationsMatchthecountrieswiththeirpopulationsin2020.1)Chinaa)5,084,0002)theUSb)25,690,0003)Australiac)331,698,0004)NewZealandd)1,411,780,0002.ReadyouranswerstoActivity1tothewholeclass.3.Nowlistenandcheck.Step3LearningtolearnTolearnhowtoseeatableandachartWhenyouseeatableorachart,lookcarefullyatthelabelsandgraphstomakesurethatyouunderstandwhattheyareshowing.Lookatthechartbelow.Whatisitcomparing?Whatcanyouconclude?Step4ReadthechartandanswerthequestionsReadthechartandanswerthequestions.1.Whichcityhadthelargestpopulationin2018?2.Whichcity’spopulationwillincreasethemostfrom2018to2030?3.Whichcitywillhavealargerincreaseinitspopulation,MumbaiorCairo?4.Whichcity/citieswillhavethebiggestpopulationproblem?Why?Step5Writea,anorthewherenecessary1.Readthepassagecarefully.2.Thenusethearticlestofillintheblankswherenecessary.Minais(1)____eighteen-year-oldgirl.She’sgot(2)____brotherand(3)____sister.Minais(4)____oldestchildin(5)_____family.Shelivesin(6)____verybigcity.Shehas(7)___jobin(8)____hotel.Shehopesthatonedayshewillhave(9)___chancetogoto(10)___college.Step6CompletethesentenceswiththecorrectformofthewordsintheboxFirstreadthesentencesandusetherightformofthewordsfromtheboxtofillintheblanks.fewgoodmuchsmall1.WebelievetheschoolsinArnwickareverygood,andwe’reworkingtomakethemeven_______.2.Theirflatistoolargefortwopeople.Theywanttofinda_______one.3.Annaalwaystalksaboutherideas.Ithinksheneedstolisten________.4.Therearealotofparksinthiscity.Ithinkthereare______parksinalotofothercities.Step7CompletethediagramshowingpopulationproblemsReadthediagram.Usethewordsfromtheboxtocompletethediagram.TogettheanswersfromtheSs.aircityflatpublicserviceschooltrafficFromParkvilletoArnwick:problemsandsolutionsProblemsReasonsSolutionsPeoplefromParkvillelivein__________________________________.It__________________________________togotoschoolbybus.______________________________________.______________________________________.______________________________________.______________________________________.______________________________________.Thegovernmentismakingagreateffortto____________________________________.____________________________________.____________________________________.Step8CompletethepassagewiththecorrectformofthewordsfromtheboxReadthepassageandmasterthedetailsinthepassage.Usethewordstofillintheblanks.GettherightanswersfromtheSs.countrysidepollutionpopulationspacetrafficOurworldisfacingmanyproblems.Twoofthebiggestareincreasingpopulationandpollution.The(1)___________oftheworldisincreasingquickly.Manypeopleareleavingthe(2)__________toworkinthecities,butthereisnotenough(3)______forsomanypeople.Anotherhugeproblemfortheworldis(4)________.There’ssomuch(5)______ontheroadsthatinsomecitiestheairisheavilypolluted.Weshouldworkhardertoprotectourworld.Step10CompletethesentenceswiththecorrectformoftheexpressionsintheboxReadthesentencesandunderstandthemeanings.Choosethecorrectformoftheexpressions.allovertheworldcloseddowninthefutureittakesnot…anymore1)Growingpopulationisaproblem________________.2)Thepopulationoftheworldmaygrowmoreslowly________________.3)Thesupermarket___________whenabiggeroneopenedinthetown.4)Usually_________anhourtogettherebybus.5)Thetownhadalotofpollutioninthepastbutit’s_____aproblem_________.Step11ListenandchoosethebestsummaryToletthestudentsmasterthesummary.a)It’scheapertoshareacarthantohaveapersonalcar.b)Peopleinacarclubdon’toftentakebuses,trainsortheunderground.c)TherearenocarclubsintheUS.d)Joiningcarclubsisgoodforyouandforthecity.Step12ListenagainandchoosethecorrectanswerJoiningacarclubischeaper/moreexpensivethanhavingapersonalcar.Peopleincarclubspayfor/don’tpayforacarwhentheydrive.Peopleincarclubssometimes/nevertakeabusorrideabike.Peopleincarclubsprobablyare/aren’thealthier.Step13WorkinpairsanddiscussthisquestionDoyouthinkcarclubswouldbepopularinChina?Why?Whynot?Step14AroundtheworldToknowabouttheworldpopulationandwater.WorldpopulationandwaterWithmoreandmorepeopleintheworld,moreandmorewaterisused.Infact,wateruseisgrowingmorethantwiceasfastastheworld’spopulation!Asaresult,gettinggood,cleanwaterisbecomingaprobleminmanyplaces.Alotofwaterispollutedandinmanyareaspeoplehavetowalkalongwaytogetcleanwaterfordailyuse.Morethan3.4millionpeopledieeachyearfromdrinkingandwashingwithpollutedwater.Solet’sdoeverythingwecantostopthepollutionandsavewater.Step15WritingTopreparetomakeyourgraphingroups.Tomakeyourgraphandpresentyourgraphtotheclass.Writeaparagraphtodescribeyourgraph.Step16中考鏈接()1.Wecanliveabetterlifeifwecreate______lesspollutedworld.A.the B.anC.a D.不填(2014江蘇鎮(zhèn)江)()2.—Wouldyoulike______newblueT-shirt,Mary?—Sorry,Mom.Iprefer______orangeone.A.a;a B.a;anC.an;a D.an;an(2014廣西來賓)()3.—HaveyouseenthefilmDad,wherearewegoing?—Yes.It’s______interestingone.A.a B.an C.the D./(2014云南曲靖)()4.—What’sthisinEnglish,Maria?