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Unit13SectionA(3a-GrammaFocus),Whatarethey?Whataretheylike?,Aretheycuteandlovely,werentthey?Buttheyareindanger.Whydoesthenumberofthembecomesmallerandsmaller?LetsreadthepassageonPage99andanswerthequestions.,Readthepassageagainandfillintheblankswiththeworksinthebox.,Manypeoledonotrealizetheyarekillingawholeofshake_theyenjoyabowlofsharkfinsoup.2.Sharksarethetopofthefoodchain,_iftheirnumbersdrop,theocreansecosystemwillbeindanger.3.Manythinkthatsharksaretoostrongtobeendangered,_theyarewrong.4._therearenoscientificstudiestosupportthis,alotofpeoplebelievethatshakrfinsaregoodforhealth.5Sharksmaydisappearoneday_wedonotdosomethingtostopthesaleofsharkfins.,soalthoughifbutwhen,时,态,一般现在时,一般过去时,一般将来时,常用八种时态,现在进行时,现在完成时,过去进行时,现在完成进行时,过去完成时,一般现在时,1.定义：表示经常性、反复性、习惯性动作或现在存在的状态。,2.,一般现在时用法,习惯活动,现在情况,客观事实,主将从现,Igetupatsixeverymorning.,Theyareverybusy.,Heneedshelp.,Themoonmovesroundtheearth.,Wellgothereifitdoesntrain.,Hellcallyouwhenhearrives.,一般过去时,一般过去时用法,过去活动,过去状态,过去连续活动,Isawhimyesterday.,IwasinGradeOnelastyear.,Shepickeditupandwentout.,一般将来时,一般将来时用法,将来状态,将来活动,主将从现,现进表将,Therewillberaintomorrow.,Whatareyougoingtodonextweekend?,IwillcallyouassoonasIgettheretomorrowmorning.,Thebusiscoming.,现在进行时,现在进行时用法,正在进行,一直进行,与always连用,Look,theyareplayingfootball.,Heiswritinganovelthisyear.,Myteacherisalwayssmilinginclass.,一共复习了5个了，还有1个呀！,过去进行时,过去进行时用法,过时正进,过段直进,when,while,Iwasdoingmyhomeworkateightlastnight.,TheywerewatchingTVfromninetotenyesterday.,Theywerereadingaloudwhentheteachercamein.,现在完成时,现在完成时用法,过影响现,过延到现,两“去”,Icantfindmypen.Ihavelostit.,Haveyoufinishedityet?,Hehasworkedhereforayear.,Ihavebeeninthisschoolsince1999.,HehasbeentoChinatwice.,Heisnthere.Hehasgonetothelibrary.,考考场,Choosethebestanswers.,1.Theshop_at7:30p.m.onweekends.A.willcloseB.closesC.closedD.hasclosed2.Ifhe_earlytomorrow,hellbelate.A.doesntgetupB.wontgetupC.getsupD.doesntgetsup3.Listen!XiaoLi_anEnglishsong.A.issingingB.singsC.isgoingtosingD.sang4.Theharderyou_,thebetterresultsyouwillget.A.willstudyB.studiedC.studyD.studying5.Theteachertoldusinclassthattheearth_aroundthesun.A.movesB.movedC.ismovingD.tomove6.Heusedto_alot.smokingB.smokeC.smokedD.smokes7.Lucy_sillyquestions.A.isalwaysaskingB.alwaysaskC.willalwaysaskD.asks,8.Jimwithhisparents_abroad.They_backintwoweeks.A.havegone；willcomeB.hasgone；willcomeC.havebeento；havecomeD.hasbeen；come9.Ihavefinishedmyhomework.When_you_it?A.have;finishedB.do;finishC.did;finishD.will;finish10.I_mymobilephonesincefiveyearsago.A.boughtB.haveboughtC.hadboughtD.havehad11.-Susan,whyareyoustillhere?Theyareallreadytostart.-Imsorry,butI_whentomeet.A.donttellB.didnttellC.haventtoldD.wasnttold12.JimisastudentandinTownHighSchool.A.studiesB.studiedC.hadstudied,13.SandyhisoldfriendTomwhenhewascrossingthestreet.A.hadmetB.hasmetC.met14.ThewholeclasstotheEastLakeifitisfinethisSunday.A.willgoB.havegoneC.go15.Who?Itsoundslikealittlegirl.A.doescryB.iscryingC.cried16.-HaveyouseenBill?-Yes,hetothelibrary.A.hasgoneB.hadgoneC.hasbeen17.-Excuseme,pleaselookatthesign“NoSmoking”.-Sorry,I_.A.dontnoticeitB.amnotnoticedC.didntnoticeitD.wasntnoticed,18.IfMike_upearlier,hecanfinishtheworkintime.A.getB.willgetC.getsD.isgetting19.Therecorder_yesterday.ItworksOKnow.A.repairedB.wasrepairedC.hasrepairedD.willberepaired20.-DoyouknowJane?-Yes,Ifirstmetherthreeyearsago.She_atafruitshopatthattime.A.hadworkedB.workedC.hasworkedD.wasworking,GrammarFocus,Filltheblankswiththecorrectformsoftheverbsinbrackets,Joe:_youever_(take)partinanenvironmentproject?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:Thatsfantastic!Iguesseveryoneinthiscityis_(try)toimprovetheenvironment.Ken:Yes,wecantaffordto_(wait)anylongertotakeaction!,4a,Thankyouforlistening!,
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