二年级上英语课件-UNIT-10-Did-you-know-剑桥版【小学学科网】

Unit10Didyouknow?theNile(尼罗河）TheNileisverylong.It’s6673kilometerslong.It’sthe______riverintheworld.longestMountEverest(珠穆朗玛峰）MountEverestisthemountainintheworld.highestsailfish（旗鱼）Thefishisthesailfish.Itcantravelat100kmperhour.fastestbluewhale(蓝鲸）Theanimalisthebluewhale.Itis30metreslongand150tons.biggestgiraffe(长颈鹿）Thegiraffeisthelandanimal.Itis5.5metrestall.tallestThemaninChinais2.36metrestall.tallesttheUSA(美国）TheplaneisintheUSA.Ittravelsat3,530kmperhour.fastestBritain(英国）ThecarisinBritain.Ittravelsat1,020kmperhour.fastestAustralia(澳大利亚）TheboatisinAustralia.Ittravelsat556kmperhour.fastestshortshortertheshortestoldolderoldestWhichisbigger,thepigortheelephant?Theelephantisbigger.Whichistaller,thegiraffeorthedog?Thegiraffeistaller.Whichisfaster,thetigerorthedog?Thetigerisfaster.What’sthesmallestinthepicture?Theantisthesmallest.What’sthebiggestinthepicture?Thewhaleisthebiggest.slowslowerslowestThesnailistheslowest.fastfasterfastestThetigeristhefastest.tall-taller–thetallestshort-shorter–theshortestold–older-theoldestyoung-younger–theyoungestfast-faster—thefastestslow-slower—theslowesttallestshortestoldestyoungestfattestthinnestbiggestsmallestfinefinerfinestthinthinnerthinnesthothotterhottesteasyeasiereasiesthappyhappierhappiest特殊形容词最高级的变化形容词最高级的构成方法：1、一般在形容词末尾加est。如：short---shortest2、一元一辅双写辅，再加est。big---biggest3.以e结尾的，直接加st。如；fine-finest4.以辅音加y结尾的，把y变i，加est。如：happy-happiestHowtallarethey?