1.decreasevt./vi.&n.减少，降低Iftheirhabitatisthreatenedortheycannotfindenoughfood，theirnumbermaydecrease.如果其栖息地受到威胁，或者无法觅取足够的食物，它们的数量就可能减少。(P25)[读一读]阅读下列句子，归纳decrease的词性、意义和用法。⑴ThepriceofthistypeofMP3playerhasdecreasedby15%.(词性:vi.；意义:减少;搭配:表示“减少了”)⑵Thenumberofnewstudentsdecreasedfrom210to160thisyear.(词性:___意义:____________搭配:表示“从……减少到……”)vi.减少到……⑶Theyaremakingeveryefforttodecreasetheproductioncost.(词性:_____意义:_________)⑷Thedecreaseinunemploymentwas30percent.(词性:______意义:________)vt.减少n.减少[练一练]选择decrease/increase并用其正确形式填空。Thenumberofvisitors___________sharplyinthepasttwomonths.The________worriesthemanager.“Somethingmustbedoneto________thenumberofvisitors.”hethought.increasehasdecreaseddecreasedecreaseby减少了……decrease(from...)to...(从……)减少到……increasev.&n.增加，增长increaseby增加了……increase(from...)to...从……)增加到……［记一记］2.dieout灭绝Asaresulttheseendangeredanimalsmayevendieout.结果，这些濒危动物甚至可能灭绝。(P25)[读一读]阅读下列句子，体会与die相关短语的不同意思。⑴Elephantswoulddieoutifmanshotasmanyastheywished.()⑵Hehidbehindthedooruntilthefootstepshaddiedaway.()灭绝逐渐减弱,逐渐消失[练一练]用thedeathof、diefrom、dieout、dyingto的正确形式填空。Kathyisalways1________seespeciesofwildlife.Sheappreciatesthatmanytypesofplantsandanimals2______inthewildeveryyear，andmostofthem3________toomuchhuntinganddestructionoftheirhabitats.Sheburstsintotearseverytimeshehearsabout4___________wildanimals.thedeathofdyingtodieoutdiefromdieout灭绝dieaway逐渐减弱，逐渐消失diefor为……而死dieof/from因……而死［记一记］3.lossn.丢失，迷失...lossofbamboogrowingareas.……竹子生长区的消失。(P25)[读一读]阅读下列句子，指出划线单词的词性、意义和用法。⑴Youwillloseyourjobifyoukeeponlikethis.(lose词性:_____意义:_____________)vt.失去⑵Losttimeisneverfoundagain.(lost词性:____词义__________)⑶Iamatalosswhattodonext.(loss词性:____词义__________)adj.丢失的,失去的n.丢失，迷失[练一练]用lose的适当形式填空。Shewasata_____whensheheardthenewsthathersonwas____intheforest.Shecouldn’tbear(承受)thethoughtof______him.Fortunately，hersonwasjust____instudyingaspecialtypeofwildanimalandforgotthetimetogohome.lostlosslostlosingataloss不知所措，困惑belostinsth.全神贯注，沉浸于belostinthought陷入深思［记一记］4.huntvt/vi/n打猎，搜寻...toomuchhuntinginthe1950s.在20世纪50年代的过度捕猎。(P25)[读一读]阅读下列句子，归纳hunt的词性、意义和用法。⑴Policearehuntingforathiefwhobrokeintothehouseyesterday.(词性:_____意义:_____搭配：huntfor意为__________________)正在追捕v.寻找⑵Hundredshavejoinedinapolicehuntforthemissingteenager.(词性:_____词义______________)⑶Sincethe1970stigerhuntinghasbeenillegalinthiscountry.(词性:_____词义______________)搜寻打猎n.n.[练一练]用hunt/hunter/hunting/huntfor的正确形式填空。Mr.Smithisanexcellent_______whousedtomakealivingby________wildanimals.Afterwildanimal________wasforbiddenhehadtogotothecityto_______anewjob.huntforhunterhuntinghuntinghuntfor搜寻，追踪gohunting去打猎jobhunting找工作househunting找房子［记一记］5.inpeace和平/和睦/安祥地...about30-40remainafterbeingleftinpeacewithnohunting.在免受捕猎打扰后，约有30到40只存留下来。(P25)[读一读]阅读下列句子，体会与peace相关短语的不同意思。⑴Hejustwantstobeleftinpeace.(意义_________________)⑵Thecountrieshavebeenatpeaceformorethanacentury.(意义_____________)和平/和睦/安祥地处于和平局面[练一练]用inpeace/atpeace/atwar填空。⑴Allthevillagerslivetogether________.⑵Thetwocountriesusedtobe________witheachother.Fortunately,nowtheyare__________.inpeace和平/和睦/安祥地atpeace处于和平局面atwar处于战争状态［记一记］atpeaceinpeaceatwar
