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1、Unit 7Whats the highest mountain in the world?,Section A 1a-2d,Grammar Focus,(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1100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,one 1 two 2 three 3 four 4 five 5,six 6 seven 7 eight 8 nine 9 ten 10,eleven 11 twelve 12 thirteen 13 four
2、teen 14,fifteen 15 sixteen 16 seventeen 17 eighteen 18 nineteen 19,2、2090等十位数,twenty 20thirty 30forty 40fifty 50sixty 60seventy 70eighty 80ninety 90,twenty-one 21 twenty-two 22 其它的十位数照此类推，如：thirty-one 31 forty-two 42 seventy-five 75 ninety-six 96,3、百、千、万,百 hundred 100 one hundred 200 two hundred 以此类
3、推 千 thousand 1 000 one thousand 2 000 two thousand英语里没有“万”这一单位，万也用thousand表示。如：10 000 ten thousand 一万20 000 twenty thousand 两万,4、十万、百万,十万的说法是：100.000 a(one)hundred thousand 200.000 two hundred thousand million 百万 a(one)million 1,000,000 two million 2,000,000 以此类推 8,000,000 eight million,多位基数词读法,457,
4、890,608,389,three hundred and eighty-nine,four hundred and fifty-seven,eight hundred and ninety,six hundred and eight,1）101999的三位数由“百位数and+两位数组成”。如：325three hundred and twenty-five,102 one hundred and two,635 six hundred and thirty-five,2)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
5、,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：2,648 two thousand,six hundred and forty-eight 16,250,064 sixteen million,two hundred and fifty thousand,sixty-four,3,872,Three thousand eight hundred and seventy-two,46,290,Forty-six thousand two hundred and ninety,58,230,Fifty-eight thousand two hundred and
6、 thirty,练一练3451,00118,657,421,three hundred and forty-five,one thousand(and)one,eighteen million,six hundred and fifty-seven thousand,four hundred and twenty-one,Grammar Focus,(二)形容词的比较级和最高级 comparatives and superlatives with adj.and adv.,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:,形
7、容词和副词的比较级,1.构成的不规则变化:e.g.good/well better best bad/badly worse worst many/much more most little less least far farther/further farthest/furthest,2.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 coldest bright brighterbrightest young younger youngest,2)以字母 e 结尾的词只加 r 或-st
8、构成 比较级和最高级。原级 比较级 最高级 nice nicer nicest fine finer finest large larger largest,3)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 biggest thin thinner thinnest 4)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 easiest happy happier happiest,5)多音节词和部分双音节词在词前加more 或most。如：delicious more delicious most delicious interesting more interesting most interesting importantmore important most important,carefully-more carefully-most carefullyquickly-more quickly-most quicklyslowly-more slowly-most slowlyeasily-more easily-most easily,Thank You!,
