八年级英语上册Unit7.ppt

Unit7What sthehighestmountainintheworld LanguageGoal Talkaboutgeographyandnature Qomolangma theNile theCaspianSea theSahara Doyouknowtheseinterestplaces Qomolangma QomolangmarunsalongtheborderbetweenChinaandNepal Itiscoveredwithsnowalltheyearround It s8844 43high thehighestintheworld It s26kilometerslong TheNileisthelongestriverintheworld It smorethan6600kilometerslong Itrunsthrough9countries it soneofthelargestriverflowsthroughtheinternationalstatesintheworldandrunsintotheMediterraneanSea 地中海 intheend TheNile TheCaspianSea TheCaspianSeaisthebiggestlakeintheworld ItliesintheborderbetweenAsiaandEurope TheSaharaisthebiggestdesertintheworld ItislocatedinthenorthernAfrica climateconditionsareverybad isoneoftheearth smostnotsuitableforbiologicalsurvival TheSahara 1aMatchthefactsyouknow Presentation squaren 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 desertintheworld TheCaspianSeais ofallthesaltlakes TheNileis riverintheworld higher thebiggest thedeepest thelongest 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 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 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 fat fatter fattest thin thinner thinnest hot hotter hottest red redder reddest wet wetter wettest big bigger biggest 5 多音节和部分双音节的词需要在形容词原级前 more构成比较级 themost构成最高级 如 beautiful morebeautiful themostbeautiful又如 delicious popular important interesting expensive creative双音节的词如 careful morecareful themostcarefuluseful moreuseful themostuseful 少数单音节词也是这样 如 pleased morepleased themostpleasedtired moretired themosttiredb 不规则变化 good better bestwell better bestbad worse worstmany much more most 三者或三者以上相比 表示最高程度时 用 the 最高级 的结构表示 这种句式一般常有表示比较范围的介词短语 例如 ZhangHuaisthetallestofthethree Heworks the hardestinhisclass 最高级的用法 2 最高级可被序数词以及much byfar nearly almost bynomeans notquite notreally nothinglike等词语所修饰 例如 Thishatisbyfar much nearly almost notnearly bynomeans notquite nothinglikethebiggest Howmuchdidthesecondmostexpensivehatcoat 3 表示 最高程度 的形容词 如excellent extreme perfect等 没有最高级 也不能用比较级 4 形容词最高级修饰作表语或介词宾语的名词 代词时 被修饰的词往往省略 e g Heisthetallest boy inhisclass 5 作状语的副词最高级前可以不加定冠词 e g Ofalltheboyshecame the earliest A whatisthelongestriverintheworld B TheNile Makeconversations A whatisthehighestm