八年级英语下册 Unit 3 Animals Are Our Friends Lesson 17 S

Unit3AnimalsAreOurFriendsLesson17Ⅰ.根据汉语提示写出下列单词或短语1.世纪n._______2.(兽类的)毛n.___3.标志;象征n._______4.勇气;胆量n._______centuryfursymbolcourage5.勇敢的;无畏的adj._____6.链子;链条n._____7.原因;动机;理由n.______8.消失;失踪v._________9.杀死v.___10.砍;剪;切;割v.___bravechainreasondisappearkillcut11.使……变小;减少v.________12.下降到_______13.还;也______decreasedroptoaswellⅡ.根据汉语提示完成下列句子1.在二十世纪初期,野生老虎的数量大约是十万。_________________the20thcentury,____________tigersinthewildwasaround100000.2.老虎在食物链的顶端。Thetigeris__________the_________.Atthebeginningofthenumberofatthetopoffoodchain3.它可以帮助保持其他野生动物的数量平衡。It__________thenumberofotherwildanimals_________.4.人们也砍伐了许多树。Peoplehave________alotoftreesaswell.helpskeepinbalancecutdown5.最近几年,老虎已经面临着消失的危险了。Inrecentyears,tigers_____________________disappearing.havebeenindangerofⅢ.Readthedialogueandanswerthequestions1.Howmanytigersarethereinthewildtoday?______________________________________2.Whatisthereasontigersareimportanttotheenvironment?____________________________________________________________________________________Thenumberhasdroppedtoafewthousand.Thetigerisatthetopofthefoodchain.Ithelpskeepthenumberofotherwildanimalsinbalance.3.Whydopeoplehuntandkilltigers?______________________________________4.Asidefromtheirbeinghuntedandkilled,whatisanotherreasontigersaredisappearing?___________________________________________________________________________Somepeoplehuntandkilltigersformoney.disappear,tigerslosetheirhomes.Peoplehavecutdownalotoftreesaswell.Asforests要点1atthebeginningof在……开始Step1难点·探(1)atthebeginningof后常接什么词?(2)beginning可构成哪些短语?Step2语境·悟*Atthebeginningofthe20thcentury,thenumberoftigersinthewildwasaround100000.在20世纪初,野生老虎的数量是十万。(P42)*Atthebeginningoftheclass,MissWangtoldastory.开始上课时,王老师讲了一个故事。Step3知识·得atthebeginningof意思是“在……之初,最初”,强调开始的时间,其后常接表示时间、事件或其他意义的名词。同义短语是atthestartof。其反义短语是attheendof...意为“在……的结尾/末端”。【拓展】beginning的其他短语Step4考点·练①今年年初我们学校建立了一个新的实验室。Anewclubwasbuiltinourschool________________thisyear.②吉姆从一开始就在公共汽车上。Jimwasonthebus_________________.atthebeginningoffromthebeginning要点2thenumberof...……的数量Step1难点·探(1)thenumberof做主语谓语动词用什么形式?(2)thenumberof和anumberof有什么区别?Step2语境·悟*Atthebeginningofthe20thcentury,thenumberoftigersinthewildwasaround100000.在二十世纪初期,野生老虎的数量大约是十万。(P42)*Anumberofstudentsareplayingontheplayground.许多学生正在操场上玩。Step3知识·得thenumberof意为“……的数量”,后接可数名词复数,但中心词是number,作主语时,谓语动词要用_____形式anumberof量词短语,意为“许多;大量”,后接_____名词。在句中作主语时,谓语动词用_____形式。number前面还可以用large,small来修饰单数复数复数Step4考点·练()①Anumberofvisitors_____visitingtheWestLakeandthenumberofthevisitors_____increasing.世纪金榜导学号A.are,isB.is,areC.are,areD.is,isA②共享单车的使用人数今年有望达到五千万。_____________sharedbikeusersisexpectedtoreach50millionthisyear.Thenumberof要点3cutdown砍伐Step1难点·探(1)cutdown宾语为代词时放在什么位置?(2)cut相关短语有哪些?Step2语境·悟*Peoplehavecutdownalotoftreesaswell.人们还砍伐了许多树木。(P42)*Thezookeepercutdownsomebambootofeedthepandas.动物园饲养员砍了些竹子去喂熊猫。*Shewantstocutthepocketmoneydownto50yuan.她想把零花钱降到50元。Step3知识·得(1)cutdown意为“砍倒”,为动副短语。当宾语为代词时必须放在cut和down_____,当宾语为名词时,放在down前后均可。(2)cutdown还可以表示“(尺寸上或者数量上)削减,缩小”,也可以与to或者on连用。之间【拓展】与cut有关的常用短语有:Step4考点·练①人类砍伐树木,因此动物处于极大的危险之中。People________manytrees,soanimalsareingreatdanger.cutdown()②(2018·安顺中考)Ithinkyoungphubbers(低头族)aresupposedto_____thetimetheyspend_____theirsmartphones.A.cutoff;inB.cutdown;onC.cutup;onD.cutin;inB()③(2018·连云港中考)—I’msorryto_____onyou,butthereareoneortwothingsIdon’tunderstand.—Itdoesn’tmatter.A.cutdownB.cutoutC.cutinD.cutoffC