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Unit7What’sthehighestmountainintheworld?GrammarFocus(一)数词Numeral数词是用来表示事物的数目和顺序的词。数词的分类：1.基数词2.序数词3.分数词今天我们先来学习一下基数词。1.复习1—100以内的所有数字。2.掌握百、千、万、十万、百万的表达法。1、1-19的基数词one1two2three3four4five5six6seven7eight8nine9ten10eleven11twelve12thirteen13fourteen14fifteen15sixteen16seventeen17eighteen18nineteen192、20—90等十位数twenty20thirty30forty40fifty50sixty60seventy70eighty80ninety90twenty-one21twenty-two22………………其它的十位数照此类推，如：thirty-one31forty-two42seventy-five75ninety-six963、百、千、万百hundred100onehundred200twohundred以此类推····千thousand1000onethousand2000twothousand·········英语里没有“万”这一单位，万也用thousand表示。如：10000tenthousand一万20000twentythousand两万·····4、十万、百万十万的说法是：100.000a(one)hundredthousand200.000twohundredthousandmillion百万a(one)million1,000,000twomillion2,000,000········以此类推······8,000,000eightmillion多位基数词读法457890608389threehundredandeighty-ninefourhundredandfifty-seveneighthundredandninetysixhundredandeight1）101~999的三位数由“百位数＋and+两位数组成”。如：325—threehundredandtwenty-five102onehundredandtwo635sixhundredandthirty-five2)三位数以上的数，从个位往前数，每三位数加一个逗号，从后往前数的第一个逗号代表thousand,第二个逗号代表million,第三个逗号是billion，注意这几个词不能用复数形式，后也不能加and。例如：2,648twothousand,sixhundredandforty-eight16,250,064sixteenmillion,twohundredandfiftythousand,sixty-four3,872Threethousandeighthundredandseventy-two46,290Forty-sixthousandtwohundredandninety58,230Fifty-eightthousandtwohundredandthirty练一练3451,00118,657,421threehundredandforty-fiveonethousand(and)oneeighteenmillion,sixhundredandfifty-seventhousand,fourhundredandtwenty-oneGrammarFocus(二)形容词的比较级和最高级comparativesandsuperlativeswithadj.andadv.大多数形容词和副词有三个等级：原级、比较级、最高级。一、形容词比较级的构成1.构成的不规则变化:2.构成的规则变化:1.构成的不规则变化:e.g.good/well–better–bestbad/badly–worse–worstmany/much–more–mostlittle–less–leastfar–farther/further–farthest/furthest2.构成的规则变化:1)单音节词和少数双音节词一般在词尾后加-er构成比较级或-est构成最高级.如：原级比较级最高级cold–——colder–——coldestbright———brighter———brightestyoung——younger——youngest2)以字母e结尾的词只加–r或-st构成比较级和最高级。原级比较级最高级nice———nicer–———nicestfine———finer————finestlarge——larger————largest3)重读闭音节词末尾只有一个辅音字母时,先双写这个辅音字母,再加-er或-est。如:big–bigger–biggestthin–thinner–thinnest4)以“辅音字母+y”结尾的双音节词，先改y为i,再加-er或-est。如：easy–easier–easiesthappy–happier–happiest5)多音节词和部分双音节词在词前加more或most。如：delicious–moredelicious–mostdeliciousinteresting–moreinteresting–mostinterestingimportant—moreimportant—mostimportantcarefully---morecarefully--mostcarefullyquickly---morequickly---mostquicklyslowly---moreslowly---mostslowlyeasily---moreeasily---mosteasily