【人教版】高中英语必修二：第4单元PeriodⅡWarmingUp&Reading课件VIP专享VIP免费

探究·核心知识探究·核心知识PeriodⅡWarmingUp&Reading1．decreasevt.&vi.减少；(使)变小或变少n．减少；降低(教材P25)Iftheirhabitatisthreatenedortheycannotfindenoughfood，theirnumbersmaydecrease.如果它们的栖息地受到威胁或是它们找不到足够的食物，它们的数量就会减少。①onthedecrease在减少中adecreasein...在……方面减少了②decreaseto...减少到……decreaseby...减少了……decreasefrom...to...从……减少到……③ontheincrease在增加Thenumberofnewstudentsdecreasedfrom210to160thisyear.今年新生人数从210减少到160。Thepriceofwheathasdecreasedby15%.小麦价格降低了15%。Themistakeshehasmadeareonthedecrease.他犯的错误正在减少。介词填空①Therehasbeensomedecrease________trafficaccidentsthisyear.②Theclubmembersdecreased________twohundredcomparedwithlastyear.③Thehousingpriceishopedtodecrease________10%thisyear.④Toourdelight，varietiesofbirdsintheforestare________theincrease.【答案】①in②to③by④on2．dieout灭绝；逐渐消失；逐渐熄灭(教材P25)Asaresulttheseendangeredanimalsmayevendieout.结果，这些濒危动物甚至会灭绝。Thisspecieshasnearlydiedoutbecauseitshabitatisbeingdestroyed.因栖息地正受到破坏，这一物种已濒于灭绝。dieof因……而死(一般指死于内因，如疾病、饥饿、情感原因等)diefrom因……而死(一般指死于外因，如外伤、车祸、污染等)dieaway(声音、风、光等)慢慢变弱，渐渐消失diedown(兴奋、火等)渐弱，渐息，平息dieoff(家庭、种族等)相继死亡，(草木)先后枯死Asthesoundofthemusicdiedaway，thefilmcametoanend.随着音乐声渐渐消失，电影结束了。Theappletreesinthefieldarealldyingofffromdisease.地里的苹果树一棵接一棵地病死了。用适当的介词填空①Nooneknowsforsurewhydinosaursdied________．②Theleavesofthetreearedying________．③Hismotherdied________heartdiseasewhilehisfatherdied________atrafficaccident.【答案】①out②off③of；from3．huntvt.&vi.打猎；猎取；搜寻(教材P25)toomuchhuntinginthe1950s二十世纪五十年代的过度捕杀Atonetimemanhadtohunttosurvive.从前人类要以打猎为生。huntforsth.搜索；寻找某物huntsp.forsb./sth.搜索某地寻找某人/物huntafter追逐，追求huntdown追捕，缉拿huntout搜寻，寻找gohunting去打猎He'sonholidayinAfrica，huntingforanimals.他正在非洲度假，打猎。完成句子①他一直在找工作。Hehasbeen____________ajob.②他们搜遍树林寻找从动物园里逃出来的狮子。They________thewood________thelionescapingfromthezoo.③很多人一生追逐名利，但是总不能成功。Manypeople________________fameintheirlivesbutneverfindit.【答案】①huntingfor②hunted；for③huntafter4．indangerof在危险中；垂危(教材P25)Whyaretheyindangerofdisappearing?它们为什么处于灭绝的危险中呢？Heisindangeroflosinghisjobifhegoesonlikethis.他再这样下去会丢掉工作的。①outofdanger脱离危险beadangertosb./sth.对某人/某物是个威胁②dangerousadj.危险的(指事物或人对别人有危险)③endangervt.危害；危及④endangeredadj.有危险的；濒临灭绝的Thewoundedpolicemanisnowoutofdanger.受伤的警察已脱离危险。Heisadangerousperson；keepawayfromhim.他是个危险人物，不要接近他。indanger/dangerousdangerous指人、物、事态可能引起危险的，对别人构成威胁的。indanger指人或物本身处于危险中，受到外来的威胁。【名师点津】不含冠词的宾短语集锦indanger(of)．..短语中名词danger前不加冠词。类似用法的短语还有inpeace(和平地；和睦地；安详地)，inrelief(如释重负；松了口气)，incommon(有共同之处)，ingeneral(总的来说)，inadvance(提前)，invain(徒劳地)，indetail(详细地)等。语法填空①Wemustd...