数词有基数词和序数词两种。英语的数词可以作句子的主语、宾语、表语和定语。
1.定义：表示数目的词叫基数词
2.常见基数词：
延申：1000→one(a) thousand,10000→ ten thousand,100000→one hundred thousand ,1000000→one million,10000000→ten million, 100000000→one hundred million, 1000000000→one(a) billion
108→one hundred and eight, 146→one hundred and forty-six, 500→five hundred , 1001→one thousand and one, 1813→one thousand eight hundred and thirteen.
注：
(1)百位与十位之间要加and；十万位和万位,亿位和千万位之间通常也要加and。
(2)英语用千、百万等单位计数,大数字从右向左看, 每隔三位划一逗号,倒数第一个逗号之前要用thousand,倒数第二个逗号之前要用million,倒数第三的逗号之前要用billion表示。
(3) hundred、 thousand、 million作数词时,不用复数,前面可以加上one, two, …等其它数词。用作名词时复数表示“成…上…”,后面必须要有of,前面可以加上some,many,several等词。如：five hundred(五百), hundreds of(成百上千的), ten thousand(一万), thousands of(成千上万的), millions of(成百万的)
1.定义：表示顺序的数词叫序数词。
2.序数词的基本变法
除第一（first）、第二(second)、第三(third)特殊外，一般在基数词后加th,(2)-ve结尾的改为-fth,(3)-ty结尾的改为-tieth。
3.常见序数词：
延申：1000th→one thousandth, 1000000th →one millionth., 第703→the seven hundred and third,
第5480→the five thousand four hundred and eightieth.
注：
(1)两位以上的序数词仅个位数部分用序数词,其余部分仍用基数词。如：thirty-sixth,
(2) 使用序数词时一般加定冠词the. 如：I’m in the third grade.
(3) 序数词作“几分之几”讲时,有复数形式。如：1/5→one fifth ; 2/3→ two thirds ; 4/7→ four sevenths ; 1/2→ a half ; 1/4→a quarter ; 3/4→ three quarters ; 50%→ fifty hundredths ( fifty per cent).
1、表示年份：2002: twenty thousand and two ; 1976 : nineteen seventy-six.
2、表示日期： 12月1日: Dec.1st或the first of December；2002年11月8日: Nov. 8th, 2002.
3、表示时刻： 5：15→ five fifteen或a quarter past five ; 8：30→ eight thirty或half past eight ; 10：45→ ten forty-five或a quarter to eleven.
4、表示编号：Room 105→Room one 0 five; Bus No.13→Bus Number Thirteen; P.5→Page Five; Tel.No.7658659→Telephone Number seven-six-five-eight-six-five-nine
5、小数的读法：5.7→ five point seven, 0.16 →zero point one six.
6、“半”的表达： 1/2→half, 半小时→half an hour, 1.5小时→one and a half hours或one hour and a half.
7、序数词前面加the时,表示顺序,加a/an时表示“再一、又一”。如：The third lesson is rather difficult.(第三课相当难)/ Shall we read the text a third time?(我们把课文读第三遍,好吗？)
练习
( ) 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
( ) 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. Nine 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.
A. three times big 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.
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 ________.
A. two B. both C. twice D. the second
( ) 22. Three hundred thousand one hundred and seventy means _______.
A. 3,170 B. 3,117 C. 300,170 D. 30,170
( ) 23. On May ________, ________ people traveled round the country.
A. the first, millions B. the first, millions of
C. first, the millionth D. first, millions
( ) 24. ________ of them are dining at school.
A. Twelve B. Twelfth C. The twelve D. The 12th
( ) 25. It’s 7:17 is read ________.
A. seven and seventeen B. seven seven
C. seven one seven D. seven seventeen
( ) 26. Four ________ two is two.
A. plus B. minus C. times D. divided by
( ) 27. Three ________ five is eight.
A. plus B. minus C. times D. divided by
( ) 28. Three ________ seven is twenty-one.
A. plus B. minus C. times D. divided by
( ) 29. Forty-two ________ seven is six.
A. plus B. minus C. times D. divided by
( ) 30. There are ________ days in a year.
A. three hundred sixty and five B. three hundred and sixty-five
C. three hundreds and sixty-five D. three hundred sixty-five
( ) 31. There are ________ students in that school.
A. two thousand eight-six B. two thousand eighty-six
C. two thousand and eighty-six D. two thousands and eighty-six
( ) 32. It took me ________ to get there.
A. two hours and a half B. two hours and half
C. two hour and a half D. two hour and half
( ) 33. September is _________ month of the year.
A. the nineth B. the ninth C. nineth D. ninth
( ) 34. Please pass me _______ book on the left.
A. third B. three C. the third D. the three
( ) 35. ________ is a very tall boy.
A. The twelve B. The twelveth C. The twelfeth D. The twelfth
( ) 36. We have known each other for ________.
A. a year and half B. a year with half
C. a year and a half D. a year with a half
( ) 37. ---“What year is it?” ---“It’s ________.”
A. nineteen hundred and ninety-seven
B. nineteen and ninety-seven
C. nineteen ninety and seven
D. nineteen ninety-seven
( ) 38. ---“What’s the date today?” ---“It’s _________.”
A. Tuesday B. June Fourth
C. June the four D. June the fourth
( ) 39. The train from Shanghai will arrive ________.
A. in quarter past six B. in a quarter past six
C. at quarter past six D. at a quarter past six
( ) 40. My friend was born on _________.
A. three of July, 1979 B. the third of July,1979
C. 1979, July the third D. 1979, the third of July
( ) 41. ________ is less than ________.
A. One-third; two-thirds B. One-third; two-third
C. First-three; first-threes D. One-third; one-three
( ) 42. ---Which lesson did you learn yesterday? ---________.
A. Lesson Seven B. Lesson seventh
C. The 7 Lesson D. 7 Lesson
( ) 43. ---“What’s the date today?” ---“It’s _______.”
A. the fourth of may B. the fourth May
C. May four D. May the fourth
( ) 44. 334 is read ________.
A. three hundreds and thirty four B. three hundreds thirty four
C. three hundred and thirty fourth D. three hundred and thirty-four
( ) 45. In February, there are only _________ days.
A. twenty nine B. twenty-nineth C. twenty-nine D. twenty eight
( ) 46. There will be a comedy on TV at ________ this evening.
A. seven past thirty B. half past seven
C. seven the thirty D. thirty to seven
( ) 47. It took me ________ to find out the key to the drawer.
A. one and half hours B. one and a half hours
C. one and a half hour D. one and half hour
( ) 48. I’m so tired after ________ walk.
A. three hours B. three hours’ C. three hour’s D. three hour
( ) 49. There are ________ stars in the sky.
A. million of B. millions of C. the million D. a million of
( ) 50. The street is ________ wide.
A. two meters B. two meter C. the two meter D. a two meter
