人教版九年级全册 unit15 were trying to save the manatees SectionA 第一课时课件.ppt

新目标九年级Unit15,Unit15Weretryingtosavethemanatees!,SectionAPeriod1,Howmuchdoyouknowaboutendangeredanimals?Howmanyendangeredanimalscanyousay?Canyourecognizetheendageredanimalsinthephotosbelow?,Warmingup,PandaPandaisoneoftheendangeredanimals.,YangtzeRiverDolphin(白鳍豚)Itslistedasoneofthe12mostendangeredanimalspeciesintheworld.,SiberianTiger(东北虎)Accordingtostatistics,theSiberiantigersleftatpresent,arelessthan20.,Whatsthis?Andhowtodescribeit?,enormous,gray,Africanelephant,1a,noisy,chimpanzee,playful,kangaroo,gentle,shy,manatee,spotted,fast,cheetah,aggressive,furry,polarbear,1bListenandcirclethewordsin1athatVictorandGinnyusetodescribetheanimals.,gentlefurryenormousplayfulnoisyshyaggressivegrayfastspotted,A:IamlikethisanimalbecauseIamstrongandintelligent.IlikewaterandIliketoeatvegetables.B:Yourelikeanelephant.A:No.B:Yourelikeamanatee.A:Yes!,1cGroupwork,Itsenormous,itsabout10feetlongandweighs1000pounds,butitsgentleandkindofshy.Theirfavoritehabitatisinthewaterunderthetreesinmangroveswamps(红树林沼泽地).Theyeataquaticfeed(水生植物).Sometimes,afemalemanateecanfeeditsbabylikeawoman,soitscalled“mermaid”(美人鱼).Butnow,someoftheswampshavebecomepolluted.Also,theresometimesisntenoughfoodforallofthem.Sotheyare,endangered!,2aListening,Listenandcompletethechart.,2b,2,500intheU.S.,waterundertreesinmangroveswamps,swampspolluted.notenoughfood.,large,10feetlong,weighs1,000pounds,2cPairwork,A:Howbigaremanatees?B:Theyreabout10feetlongandtheyweighabout1,000pounds.A:Wheredotheylive?,B:Theirfavoritehabitatisthewaterunderthetreesinmangroveswamps.A:Whyaretheyendangered?B:Someoftheswampshavebecomepolluted.Also,theresometimesisntenoughfoodforallofthem.,1.IamlikethisanimalbecauseIamstrongandintelligent.belike=looklike=besimilarto像，看起来像。e.g.Heislikehisfather.他像他的父亲。=Helookslikehisfather.=Heissimilartohisfather.,Explanation,这里的like作介词，意思为“像”，like还可做动词用，表示“喜欢”，like（doing）sth.喜欢做某事。e.g.Helikeshisfatherverymuch.他很喜欢他的父亲。Marylikesplayingvolleyball.玛丽喜欢打排球。,2.Howbigaremanatees?海牛有多大？howbig.询问体重。以how组合的疑问词组有很多，如：howold询问年龄howoften询问频率howlong询问动作持续的长短howmuch询问质量或者价钱howfar询问距离howmany询问数量howsoon询问过多久,3.theyweighabout1,000pounds,他们大约重1000磅。weighv.称重量，测重量e.g.Heweighedthestoneinhishand.他用手掂了掂这块石头的重量。Thepieceofmeatweighsfourpounds.这块肉重四磅。,weight还可用做名词，重量。e.g.Whatisyourweight？你的体重是多少？,4.Weretryingtosavethemanatees.我们正在竭尽全力拯救海牛。trytodo=tryonesbesttodo努力去做某事。e.g.Everystudentshouldtrytostudyhardinordertostudyinauniversity.为了进入大学学习,每个学生都应该努力学习。,do/does,did,be(am/is/are)doing,have/hasdone,was/weredone,have/hasbeendone,Grammar,1.当我们不知道动作的执行者时。e.g.Look!Thereisnothinghere.Everythinghasbeentakenaway.,被动语态,被动语态常用在以下情况：,2.当我们不必要提出动作的执行者时。e.g.Iwasbornin1960.3.当我们强调或侧重动作的承受者时。e.g.Sheislikedbyeveryone.(强调she)4.当我们出于礼貌避免说出动作的执行者时。e.g.Youllbecontacted.,5.当我们出于行文的需要时。e.g.ThefilmwasdirectedbyXieJin.3.有些动词习惯上常用被动语态。e.g.Heissaidtobeagoodteacher.,定义：现在完成时表示到目前为止已经完成，并对现在留下某种后果和影响的动作。,现在完成时,have/has+动词的过去分词,如:already,yet,ever,never,just,before,once,twice等连用,也可以和包括现在在内的时间状语,如thesedays,today,thisyear,sofar等连用。e.g.Wehaveseenthatfilmbefore.,1.表示过去发生的某一动作对现在造成的影响或结果,常与一些时间状语。,2.表示过去发生的动作或存在的状态,一直持续到现在,也许还将继续下去,可以和表示从过去某一时刻延续到现在的一段时间的状语连用。1)即for+时间段,since+时间点/从句,inthelasttenyears等,谓语只可用延续性动词。e.g.Hehaslivedheresince2005.,2)has/havebeento去过某地表示某人的一种经历,可与once,twice,already,ever,never等连用。e.g.IhavebeentoNewYorkonce.have/hasgoneto去某地了,说话时某人已离开此地,在去某地的途中或已在某地。e.g.HehasgonetoShanghai.,have/hasbeenin逗留在某地(已经一段时间)。常和fortendays,sinceIcamehere等连用。e.g.HehasbeeninLondonforhalfamonth.,1)WhereisJim?He_Wuhan.2)Myparents_theGreatWalltwice.Theylikethereverymuch.3)_youever_totheHappyvalley?4)Howlong_Peter_theWestHillfarm?,havebeento,Have,beento,has,beenin,hasgoneto,即学即练,5)Mysister_theshop.Shewillbebackintwohours.6)She_Shanghai.Sheisnthere.7)She_Shanghai.Sheishere.8)She_Shanghaifortwoyears.,hasgoneto,hasgoneto,hasbeento,hasbeenin,3.already-yet已经用于肯定句,用于否定句,疑问句,1.Shehasnotseenthisfilm_.Shehas_seenthisfilm.2.Ihave_combedmyhair.Haveyoucombedyourhair_.3.Hehas_watchedavideo.Hehasnotwatchedavideo_.,already,already,already,yet,yet,yet,4.现在完成时中延续性动词和非延续性动词,英语动词根据词义可分为两种,一种是延续性的,一种是非延续性的,终止性动词(也可称为瞬间动词,或点动词),如:become,begin,buy,borrow,arrive,die,finish,gettoknow,go,join,marry,start,stop等。,表示动作的发生与结束于一瞬间完成,不能再延续,所以它的现在完成时不能和表示延续的时间状语连用,即不能与表示一段时间的状语,for+时间段,since+时间点/从句连用,也不能用在howlong引导的特殊疑问句。,中常见非延续性动词有:leave,go,come,arrive,begin,buy,borrow,die,join,become等。非延续性动词要表示持续时,可用以下方法：将时间状语改为时间段+ago,句中谓语动词用一般过去时。e.g.Mybrotherjoinedthearmytwoyearsago.我弟弟参军两年了。,若保留for+时间段,since+时间点/从句,或用在howlong句型中,则需将终止性动词改为相应的状态动词或延续性动词。,come/go/arrive/get/reach/move-bein/atopen-beopendie-bedeadclose-beclosedbecome-beborrow-keepputon-wearbuy-have,常见终止性动词与延续性动词(或状态动词)的对应关系如下:,leave-beaway(from)begin/start-beonfallasleep-beasleepend/finish-beovercatchacold-haveacold,jointhearmy-beinthearmybeasoldierjointheParty-beinthePartybeaPartymember,吉姆买了这只钢笔两年了。Jimboughtthispentwoyearsago.Jimhashadthispenfortwoyears.Jimhashadthispensincetwoyearsago.ItistwoyearssinceJimboughtthispen.IthasbeentwoyearssinceJimboughtthispen.,现在完成时和一般过去时的区别：现在完成时所表明的是过去发生的动作对现在的影响,强调的是现在的情况,不可以和表示过去的时间状语。yesterday,in1991,threedaysagolasttime,lastnight等连用。一般过去时表明的是过去发生的事实,和现在不发生关系。,e.g.HehaslivedinBeijingfor8years.(A)HelivedinBeijingfor8years.(B)他在北京住了8年。(A)句讲的是到目前为止他在北京住了8年，可能还会继续在北京住下去。(B)句讲的是他在北京住过8年，现在不在北京了。,1.Itsalongtimesincewe_(meet)lasttime,isntit?2.-Iknowyou_(choose)apicturebookamongthese.-Yes,Havealookatit,please.3.Sofar,spaceshipswithoutpeople_(reach)themoonandsomeotherpartsoftheuniverse.,met,havechosen,havereached,Exercises,4.Myfather_homefornearlythreeweeks.A.hasgoneawayfromB.hasleftC.hasbeenawayfromD.wentaway,5.MrandMrsGreenhave_inChinaforaweek.A.beenB.gotC.arrivedD.reached,近义句转换：1.JackjoinedtheLeaguefivemonthsago.Jack_aLeaguememberfivemonthsago.2.Itsalongtimesincewemetlast.We_eachotherforalongtimesincewemetlasttime.,hasbeen,havent,seen,Fillintheblankswiththerightformsofthegivenwords.1.Everydaymymother_(get)upearly.2.Thedinosaureggs_(discover)manyyearsagobyscientists.3.Listen!Somechildren