数词数词分为基数词和序数词两种。

表示数目或数量多少的词叫基数词；表示数目顺序的词叫序数词。

一. 基数词1. 基数词就注意以下几点：（1）几十几的基数词的十位数与个位数之间要用连字符“-”连接。

如：eighty-five 85 twenty-six 26（2）三位数的基数词须在百位和十位（若无十位则和个位）之间用and连接。

如： three hundred and sixty-five 365 two hundred and six 206（3）基数词的复数形式。

当基数词hundred, thousand, million, billion等词前有具体数词或several修饰时，必须用单数。

如：several hundred year’s ago几百年前 two thousand students两千个学生2. 基数词的特殊用法：（1）表示“几十年代”或“几十岁”时，用逢十的基数词的复数形式。

如： in the 1990’s 20世纪90年代 in o ne’s twenties在某人20多岁时（2）用在习语中。

如：in twos and threes三三两两地二. 序数词序数词应注意的几点事项：1. 多位数的基数词变成序数词时，只需将末位基数词变成序数词，前边的基数词不变。

如：forty-two 42 forty-second第42 nine-hundred 900 nine-hundredth第9002. 当序数词用阿拉伯数字表示时，必须在数字后加上序数词的最后两个字母。

如：21st第21 32nd第323. 序数词前一般要用定冠词the，如果序数词前用a或an时，则表示“又一；再一”（没有具体范围的限制）。

如： Though he had failed twice, he wanted to try a third time.尽管他已失败了两次，他还想再试一次。

The little monkey had had three apples, and he wanted to eat a fourth one.那只小猴子已经吃了3个苹果，他还想再吃一个。

三. 分数和百分数1. 分数（1）分数的分子用基数词，分母用序数词。

如：one fifth五分之一 one tenth十分之一（2）当分子大于1时，分母用序数词的复数。

如：two thirds三分之二 five eighths八分之五（3）当分子是1时，可以用one也可以用a。

如：a second = one second a third = one third（4）当分母是2和4时，分别可以用half和quarter代替。

如：a half二分之一 three quarters四分之三2. 百分数百分数用percent表示。

如：forty percent百分之四十 three percent百分之三3. 分数、百分数与主谓一致分数、百分数的考查往往和主谓一致相联系。

当分数、百分数修饰可数名词的复数时，谓语动词用复数形式；当分数、百分数修饰不可数名词时，谓语动词用单数形式。

如： Eighty percent of the students in our school come from Henan.我们学校百分之八十的学生来自河南。

Three fourths of the students in my class are interested in English.我们班四分之三的学生对英语感兴趣。

Two thirds of the water on the earth is sea water.地球上三分之二的水是海水。

四. 倍数的表示法1. 表示“几倍大小（长短；数量）”，由“倍数+ the size（length, amount...）”结构组成。

如：The earth is forth-nine times the size of the moon.2. 表示“……比……大几倍”，由“倍数+形容词（副词）比较级+ than +被比较部分”结构组成。

如：This box is three times bigger than that one.3. 表示“……是……倍”，由“倍数+ as +形容词+ as +被比较部分”结构组成。

如：Our factory is twice as big as theirs.数词( ) 1. Lincoln was born on ________.A. February 12, 1809B. 1809, February 12C. 1809, 12 FebruaryD. February 1809,12 ( ) 2. A _______ boy can sing the English song very well.A. ten-year-oldB. ten years oldC. ten-year-oldD. 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. 16B. the 16C. 16thD. the 16th( ) 5. Do you think there is any room for us ________ ?A. twoB. the twoC. secondD. the second( ) 6. --How many students are there in your class? --________.A. Twenty nineB. Thirty and twoC. Forty-fiveD. fifties( ) 7. Which number is wrong? _______.A. NinetyB. NinteenC. NinthD. Nineteenth( ) 8. The People's Liberation Army was founded _______.A. on August 1, 1927B. in 1927, 1 AugustC. on August 1st, 1927D. in August 1, 1927( ) 9. The number 4,123 is read _______.A. four thousand one hundred and twenty-threeB. four thousand and one hundred twenty-threeC. four thousand and a hundred and twenty-threeD. four thousands a hundred and twenty-three( ) 10. The old professor still works hard though he is _________.A. in his sixtyB. in his sixtiesC. in sixtiesD. in the sixty( ) 11. This classroom is ________ ours.A. three times big asB. as three times big asC. three times as big asD. as big three times as ( ) 12. The basketball team of our school ranks ________ in the match.A. threeB. thirdC. the threeD. the third( ) 13. Which is the car that he drives? It's ________.A. fifty twoB. the fifty-two carsC. the car fifty fourD. 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 ofB. nine hundredC. nine hundredsD. nine hundred of( ) 16. --How many new words are there in ________ lesson?-- There are only _________.A. five; fifthB. fifth; fiveC. the fifth; the fiveD. the fifth; five( ) 17. ________, Coca-Cola began to enter China's market.A. In 1970'sB. In 1970sC. In the 1970s'D. In the 1970s( ) 18. There was no bus in that small town. We had a ________.A. ten miles walkB. ten-mile walkC. ten mile's walkD. tenth mile walk( ) 19. Today is the first day and ________.A. Tuesday is fourthB. Thursday is the fourthC. second is TuesdayD. a second is Thursday ( ) 20. Which room do you live in? ________.A. The 201 RoomB. Room 201C. Room 201stD. The 201's Room( ) 21. How many magazines do you have? I have ________.A. twoB. bothC. twiceD. the second( ) 22. Three hundred thousand one hundred and seventy means ________.A. 3,170B. 3,117C. 300,170D. 30,170( ) 23. On May ________, ________ people traveled round the country.A. the first, millionsB. the first, millions ofC. first, the millionthD. first, millions ( ) 24. ________ of them are dining at school.A. TwelveB. TwelfthC. The twelveD. the 12th( ) 25. It's 7:17 is read ________.A. seven and seventeenB. seven sevenC. seven one sevenD. seven seventeen( ) 26. Four ________ two is two.A. plusB. minusC. timesD. divided by( ) 27. Three ________ five is eight.A. plusB. minusC. timesD. divided by( ) 28. Three ________ seven is twenty-one.A. plusB. minusC. timesD. divided by( ) 29. Forty-two ________ seven is six.A. plusB. minusC. timesD. divided by( ) 30. There are ________ days in a year.A. three hundred sixty and fiveB. three hundred and sixty-fiveC. three hundreds and sixty-fiveD. three hundred sixty-five( ) 31. There are ________ students in that school.A. two thousand eight-sixB. two thousand eighty-sixC. two thousand and eighty-sixD. two thousands and eighty-six( ) 32. It took me ________ to get there.A. two hours and a halfB. two hours and halfC. two hour and a halfD. two hour and half( ) 33. September is _________ month of the year.A. the ninethB. the ninthC. ninethD. ninth( ) 34. Please pass me _______ book on the left.A. thirdB. threeC. the thirdD. the three( ) 35. ________ is a very tall boy.A. The twelveB. The twelvethC. The twelfethD. The twelfth( ) 36. We have known each other for ________.A. a year and halfB. a year with halfC. a year and a halfD. a year with a half( ) 37.-- “What year is it?”--“It's ________.”A. nineteen hundred and ninety-sevenB. nineteen and ninety-sevenC. nineteen ninety and sevenD. nineteen ninety-seven( ) 38.-- “What's the date today?” -- “It's _________.”A. TuesdayB. June FourthC. June the fourD. June the fourth( ) 39. The train from Shanghai will arrive ________.A. in quarter past sixB. in a quarter past sixC. at quarter past sixD. at a quarter past six( ) 40. My friend was born on _________.A. three of July, 1979B. the third of July,1979C. 1979, July the thirdD. 1979, the third of July( ) 41. ________ is less than ________.A. One-third; two-thirdsB. One-third; two-thirdC. First-three; first-threesD. One-third; one-three( ) 42. Which lesson did you learn yesterday? ________.A. Lesson SevenB. Lesson seventhC. The 7 LessonD. 7 Lesson( ) 43.-- “What's the date today?”-- “It's _______.”A. the fourth of mayB. the fourth MayC. May fourD. May the fourth( ) 44. 334 is read ________.A. three hundreds and thirty fourB. three hundreds thirty fourC. three hundred and thirty fourthD. three hundred and thirty-four( ) 45. In February, there are only _________ days.A. twenty nineB. twenty-ninethC. twenty-nineD. twenty eight( ) 46. There will be a comedy on TV at ________ this evening.A. seven past thirtyB. half past sevenC. seven the thirtyD. thirty to seven( ) 47. It took me ________ to find out the key to the drawer.A. one and half hoursB. one and a half hoursC. one and a half hourD. one and half hour ( ) 48. I'm so tired after ________ walk.A. three hoursB. three hours'C. three hour'sD. three hour( ) 49. There are ________ stars in the sky.A. million ofB. millions ofC. the millionD. a million of( ) 50. the street is ________ wide.A. two metersB. two meterC. the two meterD. a two meterKey:1. A2. C3. B4. D5. A6. C7. B8. A9. A 10. B 11. C 12. D 13. D 14.D 15. B 16. D 17. D 18. B 19. B 20. B 21. A 22. C 23. B 24. A 25. D 26.B 27. A 28.C 29.D 30. B 31. C 32. A 33. B 34. C 35. D 36. C 37. D 38.D 39. D 40. B 41. A 42. A 43. D 44. D 45. C 46. B 47. B 48. B 49. B 50. A。