八年级英语上册Unit-7.ppt

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1、Unit7What'sthehighestmountainintheworld?LanguageGoalTalkaboutgeographyandnature.QomolangmatheNiletheCaspianSeatheSaharaDoyouknowtheseinterestplaces?QomolangmaQomolangmarunsalongtheborderbetweenChinaandNepal.Itiscoveredwithsnowalltheyearround.It’s8844.43high,thehighestintheworld.It’

2、s26kilometerslong.TheNileisthelongestriverintheworld.It’smorethan6600kilometerslong.Itrunsthrough9countries,it’soneofthelargestriverflowsthroughtheinternationalstatesintheworldandrunsintotheMediterraneanSea(地中海)intheend.TheNileTheCaspianSeaTheCaspianSeaisthebiggestlakeintheworld.It

3、liesintheborderbetweenAsiaandEurope.TheSaharaisthebiggestdesertintheworld.ItislocatedinthenorthernAfrica,climateconditionsareverybad,isoneoftheearth'smostnotsuitableforbiologicalsurvival.TheSahara1aMatchthefactsyouknow.Qomolangmaabout9,600,000squarekilometersinsizetheSahara1,025met

4、ersdeeptheCaspianSea6,671kilometerslongtheNile8,844.43metershighPresentationsquaren.平方metern.米deepadj.深的desertn.沙漠populationn.人口Asian.亚洲tourv.n.旅行touristn.旅行者walln.墙amazingadj.令人大为惊奇的ancientadj.古代的wideadj.宽的；宽阔和1b比较级与最高级Qomolangmais_______thananyothermountainintheworld.TheSaharais_

5、___________desertintheworld.TheCaspianSeais_____________ofallthesaltlakes.TheNileis____________riverintheworld.higherthebiggestthedeepestthelongest大多数形容词有三个级。1.原级:Structure:as...as...像..….一样e.g.TimisastallasTom.2.比较级(用于两者之间的比较):Structure：形容词比较级＋than...e.g.Thisboxisbiggerthanthatone

6、.形容词和副词的比较级和最高级3.最高级(用于三者或三者以上的比较):Structure:the+形容词的最高级＋of/in...e.g.Tomistheheaviestinourclass.Heisthemostpopularinourschool.规则变化1)一般情况下，单音节或双音节的形容词/副词比较级＋er，最高级＋est。如:clever—cleverer—cleverestfew—fewer—fewestsmall—smaller—smallest等。形容词、副词的比较级和最高级规则变化和不规则变化2)以e结尾的词，比较级＋r，最高级＋st即可

7、。如：nice—nicer—nicestcute—cuter—cutestlarge—larger—largest3)以辅音字母＋y结尾的变y为i＋er或est如:easy—easier—easiesthappy—happier—happiest再如：early,busy,heavy,dirty,lazy也如此。4)重读闭音节，单辅音结尾的，双写这个辅音字母＋er或est的词：①fat—fatter—fattest②thin—thinner—thinnest③hot—hotter—hottest④red—redder—reddest⑤wet—wetter—w

8、ettest⑥big—bigger—biggest5