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1、人教版（新目标）（2012教材）初中八下Unit7What’sthehighestmountainintheworld？PeriodOne形容词的比较级和最高级1、规则变化：A）单音节词和少数双音节词一般在词尾加er或est：bright___________;B以不发音的e字母结尾的加r,或st：large;C以辅音字母加y结尾的变y为I加er或est:easy；D以一个辅音字母结尾的重读闭音节词双写最后一个辅音字母再加er或est:big以er，ow结尾的双音节词加er或est:cleverslow2多音节词前加more或mos
2、t,副词最高级前省略the.(3)部分形容词本身表示最高级，因此他们没有比较级和最高级形式：favouriteround2、不规则变化：good,well（）;bad,badly,ill;（）much,many（）;little（）;far;（）old（）;注：只有少数形容词和副词有两种比较级和最高级形式：oldfarTheworld’shighestmountainintheworld.Doyouknowhowhighitis?Itis8,844metershigh.QomolangmaDoyouknowSaharaisthebi
3、ggestdesertintheworld?Yes,itisabout9,600,000squarekilometersinsize.SaharaTheworld’sdeepestsaltlakeTheCaspianSeaDoyouknowthathowdeeptheworld’sdeepestSaltlake?Yes,itis1,025metersdeep.ThelongestriverinAsia.TheYangtzeRiverDoyouknowthattheYangtzeRiveristhelongestriverinAsia
4、?Yes,itis6,300kilometerslong.1aMatchthefactsyouknow.Qomolangmaabout9600000squarekilometresinsize.TheSahara1025metersdeepTheCaspianSea6671kilometerslongTheNile8844.43metershighIt’s8,844metershigh.它有8,844米高。Itis…metershigh(long,wide,deep…).它……米高（长,宽……)。表达“有多长（宽，高……）”时，将数
5、词和数量单位放在表示长宽高的形容词前1.这张桌子两米长，一米宽。2.这座山有1500米高。3.这栋楼120米高。4.这本字典有五厘米厚。5.这个湖有多深？1025米深。Thetableistwometerslongandonemeterwide.Themountainis1,500metershigh.Thebuildingis120meterstall.Thedictionaryisfivecentimetersthick.Howdeepisthelake?It’s1,o25metersdeep.Translation1bList
6、enandcompletethesentences.1.Qomolangmais_________thananyothermountainintheworld.2.TheSharais___________desertintheworld.3.TheCaspianSeais___________ofallthesaltlakes.4.TheNileis______________riverintheworld.higerthebiggestthedeepestthelongest写出下列单词的比较级和最高级highdeepbiglo
7、ngoldyoung自主互助学习请根据预习写出下列短语1.最高的山2.最长的河3.八百万平方公里4.1025米深5.……的人口6……的高度7.和…一样大11.少于……的长度TheYangtzeRiverisabout____kilometreslongandtheYellowRiveris____kilometerslong.Chinahasthebiggestpopulationintheworld.It'salotbiggerthanthepopulationoftheUS.Chinaisover_____yearsold.It
8、hasamuchlongerhistorythantheUS.TheUSisnoteven_____yearsold.ChinaisalmostasbigastheUS,anditisthebiggestcountryinAsia.6
