第四章 数 词一、数词概述1、数词的定义:表示数目多少或顺序先后的词为数词。2、数词的分类:数词可分为基数词和序数词,基数词表示数量的多少,序数词表示顺序的先后。二、数词考点纵览知识点考点考点对应典型例题剖析考点1:基数词的构成。① 基数词 1-12 是独立的单词。one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve② 基数词 13-19 是在个位数后面加 -teen 构成,其中 thirteen,fifteen, eighteen 是不规则变化。thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen③ 整十的基数词 20-90 是在个位数词后面加-ty 构成,其中 twenty,thirty, forty, fifty, eighty是不规则变化。twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety④ 非整十基数词 21-99 是在十位数后面加上个位数构成,中间加上连字符“-”。twenty-one, seventy-six, eighty-eight⑤ 三位数以上的基数词,百位数和十位数之间用 and 连接。two hundred and one, five hundred and sixty-five, three thousand fivehundred and fourteen⑥ 英语中没有“万”和“亿”这两个单位,在表示“万”和“亿”时,把“万”念成10 个千,“十万”念成 100 个千,“亿”念成 100个百万……以此类推。10,000:ten thousand100,000: a hundred thousand100,000,000: a hundred million35, 845: thirty-five thousand, eight hundred and forty-five考点一:基数词的用法考点2:hundred, thousand, million 和 billion 的用法hundred, thousand, million 和 billion 等表示确切数字时,只用其单数形式;但是在表示不确切数字时,要用其复数形式,并且与 of 连用,表示约数。典型例题 1There are more thandays in a year.A. three hundredsB. three hundredC. three hundreds ofD. three hundred of答案:B典型例题 2visitors travel to the Great Wall every year.A. ThousandsB. Thousands ofC. ThousandD. Thousand of答案:B典型例题 3The car costs the mandollars.A. several millionB. million ofC. millionD. several millions答案:A考点3:基数词表示编号Lesson Five (the fifth lesson) 第五课Room 306306 房间Page Twelve (the twelfth page) 第十二页Cl...