公共英语等级考试PETS二级语法资料汇总(四)数词
(四)数词 1. 数词分类: 分类 在句中充当的成分 例词 基数词 主语、表语、宾语、定语、同位语 one, eleven, fifty 序数词 主语、表语、宾语、定语、同位语、状语 second, eighth, fortieth 2.基数词的构成及用法: 类型 构成方法 例词 1-12 单独的词 one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve 13-19 在3-9的词尾加上“-teen” thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen 20,30,40-90 以“-ty”结尾 twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety 100,1000,1000,000, 1000 000 000, 百,千,百万,十亿都有具体量词 one/a hundred, one/a thousand, one/a million, one/a billion 21-99 “几十”和“个位”之间用连字符“-” twenty-three,forty-eight 101-999 “百位”后“十位”前加“and” 826: eight hundred and twenty-six 1,000以上 先从右向左每三位数加一逗号,从右向左第一个逗号为thousand,第二个为million,第三个为billion,然后每三位为一单位从左向右读。 1,234,567,892: one billion, two hundred thirty-four million, five hundred sixty-seven thousand eight hund red and ninety-two 3.序数词的构成: 类 型 构成特点 例词及缩写式 one, two, three 单独记忆 first (1st), second (2nd), third (3rd) four~nineteen 在基数词尾加-th fifth (5th), ninth (9th), twelfth (12th) -ty结尾的词 把y→ie,在基数词尾加-th twentieth (20th), fiftieth (50th), fortieth (40th) 以1~9结尾的多位数 变个位数为序数词即可 twenty-first (21st), ninety-ninth (99th) hundred, thousand, million, billion 在基数词尾加-th即可 hundredth (100th) thousandth (1,000th) millionth (1,000,000th) billionth (1,000,000,000th) 4.序数词的用法: 序号 用法特点 举 例 1 前面要加the He’s always the first to get to meeting-room. 2 前面用a/an表“又一,再一” He’d better try a fourth time. |