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基数词&序数词 一、基数词

1. 1-10 （ one, two, three, four, five, six, seven, eight, nine, ten）

2. 11-19 (eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, 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 seventy-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---second; 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； second---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 Room 404 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？ 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； （five past seven 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）

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（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 seventy-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 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

数词专项练习 (一) 50题

( ) 1. Lincoln was born on ________.

A. February 12, 1809 B. 1809, February 12 C. 1809, 12 February D. February 1809,12 ( ) 2. A _______ boy can sing the English song very well.

A. ten-years-old B. ten years old C. ten-year-old D. fifth years old

( ) 3. An hour later, _____ minister was sent to see the “magic cloth” woven by those two men.

A. two B. the second C. the two D. second ( ) 4. Abraham Lincoln was _______ President of the United States. A. 16 B. the 16 C. 16th D. the 16th ( ) 5. Do you think there is any room for us ________?

A. two B. the two C. second D. the second

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( ) 6. ---How many students are there in your class? ---________.

A. Twenty nine B. Thirty and two C. Forty-five D. fifties ( ) 7. Which number is wrong? _______.

A. Ninety B. Ninteen C. Ninth D. Nineteenth ( ) 8. The People’s Liberation Army was founded _______. A. on August 1, 1927 B. in 1927, 1 August C. on August 1st, 1927 D. in August 1, 1927 ( ) 9. The number 4,123 is read _______.

A. four thousand one hundred and twenty-three B. four thousand and one hundred twenty-three C. four thousand and a hundred and twenty-three D. four thousands a hundred and twenty-three

( ) 10. The old professor still works hard though he is _________.

A. in his sixty B. in his sixties C. in sixties D. in the sixty

( ) 11. This classroom is ________ ours. 主语+谓语+倍数（或分数）+as+adj. +as A. three times big as B. as three times big as C. three times as big as D. as big three times as ( ) 12. The basketball team of our school ranks ________ in the match. A. three B. third C. the three D. the third ( ) 13. ---Which is the car that he drives? ---It’s ________.

A. fifty two B. the fifty-two cars C. the car fifty four D. the fifty-fourth car ( ) 14. Which of the following is wrong? ________.

A. He is a fifteen-year-old boy. B. He is at the age of 15. C. He is a boy of 15. D. He is fifteen year old. ( ) 15. Our school is not very big. There are only ________ students. A. nine hundreds of B. nine hundred C. nine hundreds D. nine hundred of ( ) 16. ---How many new words are there in ________ lesson? ---There are only _________.

A. five; fifth B. fifth; five C. the fifth; the five D. the fifth; five ( ) 17. ________, Coca-Cola began to enter China’s market. 年代的表达方法 In+the+年+-s A. In 1970’s B. In 1970s C. In the 1970s’ D. In the 1970s ( ) 18. There was no bus in that small town. We had a ________. A. ten miles walk B. ten-mile walk C. ten mile’s walk D. tenth mile walk ( ) 19. Today is the first day and ________.

A. Tuesday is fourth B. Thursday is the fourth C. second is Tuesday D. a second is Thursday ( ) 20. ---Which room do you live in? ---________.

A. The 201 Room B. Room 201 C. Room 201st D. The 201’s Room ( ) 21. ---How many magazines do you have? ---I have ________.

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