内容正文:
课 题
数词
教学目标
(1) 掌握基数词、序数词、小数、分数和百分数的读法以及基本用法
重、难点
1、 基数词变为序数词
2、 单位词hundred,thousand,million,billion加s与不加s的区分
3、分数和百分数作主语时谓语动词单复数的选择
[①紧扣考点 专题讲解]
1、 知识点解析
1、 数词的含义
表示数目多少或顺序先后的词叫数词。
二、数词的分类
基数词
序数词
小数
分数
百分数
三、基数词:用来表示数目多少的数词
记忆方式
示例
1-12单独记
one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve
13-19词尾为后缀-teen
thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen
20-90逢十词尾为后缀-ty
twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety
21-99(除逢十词外)在十位数和个位数之间加连字符构成
twenty-nine, thirty-eight, forty-seven, fifty-six, sixty-five, seventy-four, eighty-three, ninety-two
单位词
100hundred 1,000thousand 1,000,000million 1,000,000,000billion
说明:(1)101-999先说几百,再加and,再加末尾两位数(或末尾一位数)
168 one hundred and sixty-eight, 908 nine hundred and eight
(2)1,000以上的数词,先从后向前数,每三位用一个千分撇隔开。第一个千分撇表示thousand(千),第二个千分撇表示million(百万),第三个千分撇表示billion(十亿),然后一节一节地用几百几十几的方法表示
1,234 one thousand, two hundred and thirty-four
12,345 twelve thousand, three hundred and forty-five
123,456 one hundred and twenty-three thousand, four hundred and fifty-six
1,234,567 one million, two hundred and thirty-four thousand, five hundred and sixty-seven
★基数词的用法
(1) 表示数量 eg. 一 How many books would you like?-I would like two.
(2) 表示号码 eg. My phone number is 6887789.
(3) 表示时间 eg. I watch CCTV News at seven o’clock every evening.
(4) 表示“不确切岁数或年代”用几十的复数形式。
如: He is in his early thirties.他有三十来岁(31—34岁)
This took place in the 1930s.这事发生在二十世纪三十年代
(5) 基数词在表示具体数字时,数字+hundred/thousand/million
当表示不确切的数字时,hundreds/thousands/millions+ of
hundreds of(数百,成百上千的),thousands of(数干,成千上万的),millions of(数百万)
如:There are six hundred students in our grade.
Hundreds of old people died of cold last winter.
(6)基数词常和一些计量类名词“单数”用“--”连在一起,构成复合形容词,修饰名词。
如:a twelve-year-old boy一个十二岁的男孩
a five-mile race一次五英里的赛跑
(6) another +基数词+名词=基数词+more+名词
如:two more apples=another two apples.
真题再现
( )1