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《Unit 3 Animals Are Our Friends Lesson 17 Save the Tigers 课件1》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、Lesson17SavetheTigersUnit3AnimalsAreOurFriendscenturyfursymbolcouragebravechainn.世纪n.（兽类的）毛n.标志，象征n.勇气，胆量adj.勇敢的，无畏的n.链子；链条Wordsandexpressionsbalancereasondisappearkillcutdecreasen.平衡，平稳n.原因，动机，理由v.消失，失踪v.杀死v.砍，切，剪，割v.使……变小；减少WordsandexpressionsTousethefollowingwor
2、dsandexpressionscorrectly:century,courage,brave,reason,kill,cut,atthebeginningof…,dropto,foodchain,inbalance,indanger,cutdown,aswellobjectivesThinkaboutit!Wherecanyouusuallyseeatiger?Doyouthinktigersneedourhelp?Whyorwhynot?Seethevideoofapublic-serviceadvertisement.
3、Seethevideoofareport.Therearecurrentlysixtypesoftigers:theBengaltiger,theSiberiantiger,theSumatrantiger,theMalayantiger,theIndochinesetigerandtheSouthChinatiger.theBengaltigertheSiberiantigertheSumatrantigertheMalayantigertheIndochinesetigertheSouthChinatigerReadth
4、elessonandanswerthequestions.1.Howmanytigerswerethereatthebeginningofthe20thcentury?Around100000.2.Howmanytigersarethereinthewildtoday?Thenumberhasdroppedtoafewthousand.3.Wheredotigerslive?TheyliveintheforestsofAsia.4.Whatdotigerslooklike?Theyusuallyhaveorangefuran
5、ddarkstripes.5.Whatdotigerssymbolize?Theyaresymbolsofstrengthandcourage.6.Howaretigersdescribedinmanystories?Theyarebrave.7.Whatdoes“atthetopofthefoodchain”mean?Tigersarethekingofallthewildanimals.8.Whatisthereasontigersareimportanttotheenvironment?Becausetigershel
6、pkeepthenumberofotherwildanimalsinbalance.9.Whydopeoplehuntandkilltigers?Theyareformoney.10.Asidefromtheirbeinghuntedandkilled,whatisanotherreasontigersaredisappearing?Peoplehavecutdownalotoftreesaswell.Asforestsdisappear,tigerslosethehomes.LanguagePoints1.Atthebeg
7、inningofthe20thcentury,thenumberoftigersinthewildwasaround100000.在二十世纪初期，野生老虎的数量大约是十万只。thenumberof意为“……的数量”，跟复数名词连用作主语时，中心词是number，谓语动词要用单数。anumberof表示“许多”，相当于many，修饰可数名词复数。作主语时，谓语动词用复数。number前可用large，small等修饰，表示程度。例如：Thenumberofstudentsinourclassis50.Thenumberofpa
8、gesinthisbookis60.Anumberofstudentsareplantingtreesonthehill.2.Buttodaythatnumberhasdroppedtoafewthousand.但是现在，数量已经下降到几千只。afewthousand表示“几千”。当hun
