基数词&序数词
一、基数词树正群海
1. 1-10 ( one, two, three, four, five, six, ven, eight, nine, ten)海苔怎么吃
2. 11-19 (eleven, twelve, thirteen, fourteen, fifteen, sixteen, venteen, eighteen, nineteen)
3. 两位数(非整数),十位数和个位数之间用连字符“-”。 ( 21 twenty-one; 76 venty-six)
4. 两位数(整数),以ty结尾; (40 forty; 90 ninety)
4. 三位数,在百位数和十位数之间用and连接。
101 a hundred and one; 320 three hundred and twenty; 648 six hundred and forty-eight
5. 百(hundred),千(thousand),百万(million),千万(billion)
6. 表示确切的百、千、百万时,不能用其复数形式; ( 400 four hundred,hundred不加s)
表示成百、成千时,用其复数形式;( 成百 hundreds of; 成千 thousands of )
7. 表示“人的不确切岁数”,用几十的复数形式;
He became a professor in his thirties. (他在三十多岁成为教授。)
8. 表示年代时,用几十的复数形式;
It was in 1960s. (那是在20世纪60年代。)
二、序数词
1、英语的序数词基本变法:
(1) 1-19:一般在基数词后加th
特殊情况:one---first ; two---cond; three---third; eight---eighth; nine---ninth;
-ve结尾的改ve为f加th;(如five---fifth; twelve---twelfth)
(2)两位数(整数),改y为-ie,加th; (如twenty---twentieth; thirty---thirtieth)
(3)两位数/多位数(非整数),仅个位数部分用序数词。
(如:thirty-sixth, fifty---third, one hundred and twenty-first)
2.缩写形式:阿拉伯数字 + 序数词末尾两个字母 (只有1st, 2nd, 3rd为特殊形式,其他都是阿拉伯数字+ th)
first ---1st; cond---2nd; twentieth ---20th; twenty-third ---23rd
三、基数词/序数词用法辨别
1. 基数词也可以表示顺序,要将基数词放在名词之后。
the first Lesson --- Lesson One / the fifth page --- Page 5
2. (1)序数词前面加the时,表示顺序,
This is the fourth time I come here. 这是我第四次来这儿。
(2) 加a/an时表示“再一、又一”
We’ve tried it three times. Must we try it a fourth time? 我们已经试过三遍了,还必须再试一次(第四次)吗?
客服工作内容
四、时间的数词表示法
1. 表示时刻
(1)整点用“ o’clock ”; (5: 00读作five o’clock或five)
(2)几点过几分,分钟 + past + 小时; 重点支援大西北打一字
(five past ven 七点过五分; a quarter past eight八点过一刻; half past eight八点半)
(3)几点差几分,分钟 + to + 小时;
(ten to eight八点差十分; a quarter to twelve 十二点差一刻)
(4)直接法:小时 + 分钟;
(6: 31读作six thirty-one; 10:26 ten twenty-six)
2. 表示日期,用the 加序数词表示,或用缩写形式
12月1日: Dec.1st或the first of December;2002年11月8日: Nov. 8th, 2002.
3. 表示年份,用基数词表示
2002读作twenty thousand and two; 1976读作 nineteen venty-six
4. 表示年代,用the + 年代 + ‘s/ s
在20世纪30年代: in the 1930’s 或 in the 1930s
5. 表示世纪,用the + 序数词 + century,或者 the + 整百 + ‘s/s
20世纪: the 20th century 或 the 1900’s/ the 1900s
五、分数/小数/百分数表示法
1、分数表示法:基数词作分子,序数词作分母;
分子是“1”时,序数词用单数;除此之外,序数词用复数
1/3:one third / a third; 1/2:a half; 1/4:one quarter ;
3/4:three fourths/ three quarters ; 1:one and a half
2. “半”的表达:
一半---a half; 半小时→half an hour; 1.5小时→one and a half hours或one hour and a half.
3. 当分数后接名词时,如果分数值大于1,名词用复数;小于1,名词用单数。
one and a half hours一个半小时; two and three fourths meters 2.75米
3)小数:小数点左边合起来读,小数点右边的数字分开读,小数点读作point
杉的组词 10.25 -----ten point two five / 1.03----one point o three
4)10.25 -----ten point two five / 1.03----one point o three
4)百分数:用基数词+ percent表示
50%---fifty percent; 3% ----- three percent
专项练习题
1. Excu me, how does this number 20,135 read? It reads__________.
A. twenty thousands one hundred and thirty-five. C. twenty thousand one hundred and thirty five.
B. twenty thousand one hundred and thirty-five. D. twenty thousands, one hundred and thirty-five.
2. Each year, _________ fished are killed by the polluted water and many people are made sick by the polluted air.
A. millions of B. million of C. two millions of D. two millions恋爱节奏
3. During the ven-day May Day holiday __________ families went sighteing.
A. thousand B. thousands C. thousands and thousands D. thousands of
4. The building has ___________ floors. They live on the __________ floor.
A. ninth, last B. nine, nine C. nine, ninth D. nine , tenth
5. The beautiful skirts are on show in the shop. Jane likes _________.
A. the ninth B. the nineth C. nine D. ninth
6. December is the ________ month of the year.
A. twelve B. twelveth C. twelvitth D. twelfth
7. I think that the _________ century(世纪) will bring us more hopes.
A. twenty-one B. twentiety-first C. twenty-first D. twentieth-one招成语
8. Now let me have ___________.
学生论文 A. the third try B. a third try C. third try D. this third try
9. My sister is a student of ________.