八年级英语上册 Module 2 Science and technology Unit 3 Computers Grammar课件 （新版）牛津深圳版.ppt

U3-Grammar,AThecomparativeofadjectives,Whenwecomparetwopeopleorthings,wecanusethecomparativeofadjectives.Weformthecomparativeofadjectiveslikethis:,Toformthecomparativeofadjectives,weoftenadd_toshortadjectivesanduse_withlongadjectives.Weoftenuse_afterthecomparativeofadjectives.,Workouttherule,Mybookismoreinterestingthanyours!,-er,more,than,AThecomparativeofadjectives,EX.Completetheconversationbelowwiththecomparativeoftheadjectivesfromthebox.,bigexpensiveheavylightsmall,Salesman:CanIhelpyou,sir?David:Yes,Ineedasuitcase.Canyoutellmeaboutthesetwo?Salesman:Sure.Theredonecosts￥2500,anditsmadeofleather.David:Isee.Theredoneis_thantheblackone.Whatabouttheweight?Whichoneis_?,moreexpensive,lighter,bigexpensiveheavylightsmall,Salesman:Theblackone.Itsmadeofplastic.Trythem,sir.David:Youreright.Theredoneis_thanthebalckone,andits_thantheblackone.Salesman:Doyouhavealotofthingstocarry?David:Yes,Ido.Illhavetheblackonebecauseits_thantheredone.Salesman:Thankyouverymuch,sir.,heavier,smaller,bigger,BThesuperlativeofadjectives,Whenwecomparemorethantwopeopleorthings,wecanusethesuperlativeofadjectives.Weformthesuperlativeofadjectiveslikethis:,Toformthesuperlativeofadjectives,weoftenadd_toshortadjectivesanduse_withlongadjectives.Weusuallyuse_infrontofthesuperlativeofadjectives.,Workouttherule,-est,most,the,BThesuperlativeofadjectives,B1Davidisshoppingforacamera.Lookatthephotosandwritetheletterofthecorrectmodelaftereachstatement.,￥3589,Madein2010350g109mm78mm46mm,￥2530,Madein2012170g99.8mm56.4mm24.5mm,￥1700,Madein2011183g103mm57mm27.3mm,a.,c.,b.,￥3589,Madein2010350g109mm78mm46mm,￥2530,Madein2012170g99.8mm56.4mm24.5mm,￥1700,Madein2011183g103mm57mm27.3mm,a.,c.,b.,David:Idliketoseesomeofyourcameras.Salesman:Certainly.Thisisthemostexpensivemodel._Thisisthecheapestmodel._Thisisthenewestandlightestmodel._,BThesuperlativeofadjectives,B2DavidtoldhisfriendTonyabouthisshoppingtrip.CompleteDavidssentenceswiththesuperlatieoftheadjectivesfromthebox.,expensivelightoldsmall,Tony:Didtheyshowyouanycameras?David:Yes.The_modelis_.The_modelcosts_.The_modelwasmadein_.The_modelweighs_.,smallest,99.8mm56.4mm24.5mm,mostexpensive,￥3589,oldest,2010,lightest,170g,Summary,规则变化（一）,单音节词和少数双音节词尾加er/est变为比较级/最高级,Summary,规则变化（二）,多音节词和一些双音节在词前加more/most变为比较级/最高级,Summary,不规则变化,拓展,形容词比较级的几种用法,1.Ais+adj.+er+thanB.(两者）JimistallerthanMike.2.比较级前面可以有much,alittle,alot,even等修饰语JimismuchtallerthanMike.3.数量+比较级+thanJimis10cmtallerthanMike.4.比较级+比较级，表示“越来越”hotterandhottermoreandmorebeautiful5.the+比较级，the+比较级表示“越就越”Theharderyouwork,thebetteryouwillbe.,1.Aistheadj.+estof/in.（三者或三者以上）JimisthetallestboyinClass3.=JimistallerthantheotherboysinClass3.=JimistallerthananyotherboyinClass3.2.the+序数词+形容词最高级+名词+in/of表示“第几最”MikeisthesecondtallestboyinClass3.3.oneof+the+形容词最高级+名词复数+in/of表示“最之一”JimisoneofthetallestboysinClass3.,拓展,形容词最高级的几种用法,Post-activity:Doasurvey,Giveareport,Almosteverystudenthasa_athome.Itis_and_.Laptopsare_and_.Soitisbecoming_and_popular.Withthedevelopmentoftechnology,