(
课件网) 英语（牛津版） 八年级 上册 Unit 2 Numbers English Grammar 请用英语朗读下面的数字。 1. (1) 0.03 (2) 1.75 (3) 23.48 2. (1) 4% (2) 94% 3. (1) 20 July, 1998 (2) Oct. 1st, 2019 4. (1) 7:15 (2) 9:30 (3) 10:45 5. (1) 639 148 (2) 945 8204 (3) 7339 2318 3 three 13 thirteen 20 twenty 70 seventy 11 eleven 15 fifteen 30 thirty 82 eight-two 12 twelve 18 eighteen 50 fifty 98 ninety-eight 100 one hundred 200 two hundred 375 three hundred and seventy-five A Cardinal and ordinal numbers We use cardinal numbers to count things. 1,000 one thousand 4,189 four thousand one hundred and eighty-nine 15,362 fifteen thousand three hundred and sixty-two 100,000 one hundred thounsand 285,643 two hundred and eight-five thousand six hundred and forty-three 1,000,000 one million 3,367,982 three million three hundred and sixty-seven thousand nine hundred and eighty-two In the cardinal numbers, we do not add-s to hundred, _____and_____. With large numbers, we put _____ between hundred and ten. Work out the rule thousand million and 数词概述 ★ 数词的定义 表示数目多少或顺序先后的词叫数词。 ★ 数词的分类： 数词分为基数词和序数词。 ★ 基数词作用：表示数目或数量多少。 ★ 序数词作用：表示顺序和等级。 ★ 数词在句中的成分： 可作主语、宾语、表语、定语和同位语等。 两位数以内的 基数词 几十几的基数词 三位数的基数词 千，百万，亿 1-12 12-19 20-90整十数 基数词 ★ 1-12 的基数词： one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve. ★ 13-19 的基数词：以-teen结尾。 thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen. ★ 20-90的整十数基数词的表示方法： 均以 -ty 结尾. twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety. ★ 几十几的基数词： 十位数与个位数之间要用连字符“-”连接. 例如：85— eighty-five 28—twenty-eight ★ 三位数的基数词： 在百位和十位（若无十位则和个位）之间用and连接。 如：148—one hundred and forty-eight, 206—two hundred and six ★ 多位数的表示方法： 从个位开始三个化为一级，分为个级，千级，百万级和十亿级，读的时候从高位开始按照三位数的读法读出再加上表示级别的词。如: 31,415,923 读作：thirty-one million four hundred and fifteen thousand nine hundred and twenty-three 【Things to remember】 hundred(百）thousand(千），million(百万），billion（十亿） 前面有数词时后面不加s. For example: 5000—five thousand 表示不确定的数目时后面加s,再加单词of. For example: hundreds of 成百上千 thousands of 成千上万 ★ 基数词的写法 1）每三位数算一个单位，三个0为千，六个0为百万，9个0为十亿。 2）长的基数词则要用逗号，从右向左三位三位地分开。 写出下面数字： 1. three thousand eight hundred and sixty-two 2. . four hundred and eighty-nine thousand, nine hundred and thirty-two 3,862 489,932 We use ordinal numbers to show the order of things. 1st first 7th seventh 13th thirteenth 19th nineteenth 2nd second 8th eighth 14th fourteenth 20th twentieth 3rd third 9th ninth 15th fifteenth 21st twenty-first 4th fourth 10th tenth 16th sixteenth 33rd thirty-third 5th fifth 11th eleventh 17th seventeenth 40th for ... ...
