新高考英语语法表格式详解讲义：数词

中小学教育资源及组卷应用平台 数词 表示数目多少或顺序先后的词叫数词,主要有基数词,序数词,小数,分数和百分数等基数词, 小数, 分数和百分数表示数目或数量的多少。序数词表示顺序和等级。其功能相当于名词或形容词, 在句子中作主语、宾语、表语、定语和同位语等成分。 一、 数词的分类及表示方法 基数词 变化方式 例词 1～12无固定词形 one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve 13 ～19加后缀teen ▲thirteen fourteen ▲fifteen sixteen seventeen ▲eighteen nineteen 20～90整+加后缀+ty ▲twenty ▲thirty ▲forty ▲fifty, sixty, seventy ,▲eighty, ninety 十位和个位用“-”连接 twenty-nine, thirty-eight, forty-seven, fifty-six, sixty-five, seventy-four, eighty-three, ninety-two 单位词 100：hundred l,000：thousand l,000,000：million 100,000,000：hundred million l,000,000,000：billion ▲十位和个位之间用“-”▲百位和十位之间用“and"▲千位和百位之间用“, ”隔开 100：one hundred 202：two hundred and two121：one hundred and twenty-one1,221：one thousand, two hundred and twenty-one12,321：twelve thousand, three hundred and twenty-one123,321：one hundred and twenty-three thousand, three hundred and twenty-one1,234,321：one million, two hundred and thirty-four thousand, three hundred and twenty-one 序数词 第1至第3形式各异 first 1st second 2nd third 3rd 第4至第l9用基数词+th fourth, ▲ fifth, sixth, seventh,▲eighth,▲ ninth, tenth, eleventh,▲ twelfth, thirteenth, fourteenth, fifteenth, sixteenth, seventeenth, eighteenth, nineteenth 第20至第90变y为-ieth twentieth, thirtieth, fortieth, fiftieth, sixtieth, seventieth, eightieth, ninetieth 只改变个位基数词为序数词 thirty-first, forty-second, fifty-third, sixty-fourth, seventy-fifth, eighty-sixth 100th：(one) hundredth101st：(one) hundred and first132nd：(one) hundred and thirty-second1,123rd：(one) thousand, one hundred and twenty-third1,000,000th：(one) millionth 1,000,000,000th：(one) billionth1,324,657,890th：(one) billion, three hundred and twenty-four million, six hundred and fifty-seven thousand, eight hundred and ninetieth 二、 与数词相关的其他表示法 小数 小数点读作point 0.035读作zero point zero three five1.58％读作one point five eight percent 倍数 once一倍twice二倍3 times三倍4 times四倍 3 times as long as The railway is twice longer than that one． 3 times the length of The lengthof the railway is 3 times the length of that one． 百分数 ％读作percent 45％读作forty-five percent96％读作ninety-six percent 分 数 分子基数词, 分母序数词；分子大于一,分母加“s”,分母若是2和4, 则用half, quarter代替 1/3读作one(-)third 3/5 three-fifths 1/2 读作one/a half 1/4读作one-fourth 或 one/a quarter注：(口语中) a third/a half/a quarter/a fourth比one-third／one half/one quarter/one fourth常见 度数 19 ℃ 读作nineteen degrees centigrade ; –12℃读作 minus twelve degrees centigrade 或12℃ below freezing; 0℃读作 zero degriee centigrade ; 0摄氏度以上 读作over zero centigrade 其他 the 10th line from the bottom/end 倒数第10行；last but one/ two 倒数第二/三 常见数学式子的英文读法 1.A + B=？How much is A plus B 2. A + B=… A plus B i ... ...