midnight深夜
基数词规律：1, 1至12各不同 2,13至19都以teen 结尾 3,20至90 的整十数都以ty 结尾
4,21至 91 的非整数：整数与个数间加 ―一‖ 5，百是hundred, 千是thousand 序数词规律：1，第一至第三有独立式
2，第四至第十二加th (除fifth, eighth, ninth, twelfth 外) 3, 整十数： y 改I 加eth
4, 21至99 间的非整十数：在整数基数词后加―一‖，然后加上个位序数词。
基数词变序数词口诀：
基变序，有规律。
一、二、三、特殊记，词尾字母t,d,d.(first, second, third)。 八减t,九去e,（eighth, ninth）, f 来把ve替。（twelfth）. 单词ty作结尾，ty变成tie(twentieth).
若是碰到几十几，只变个位就可以。（twenty-first） 数词的用法：
（1）时间表达法： 1, 直接表达法 1:53 One fifty-three 8:00 eight o‘clock 2, 间接表达法 8:15 a quarter past eight 9:30 half past nine 11:25 twenty-five past eleven. 11:50 ten to twelve （2）年月日的表达法：年用基数词，日用序数词。 1，月日年， January (the) 19th, 2009 2, 日月年， the 19th of January, 2009
（3）. hundred, thousand, million 与数字连用，表示一定量的具体数字，不用复数，但表示不定概念可用复数
例：three hundred people, millions of people
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（4）. 基数词表示时刻。
例：7点 seven o‘clock, 7:20 seven twenty （5）. 给某些事物编号
例：Lesson One=the first lesson Bus No. 2 7月1日=July I (July Ist)
1996年6月3日=June 3, 1996=June the third, nineteen ninety-six
（6）. 有关分数表示法。分子是基数词，分母是序数词。当分子大于1时，分母就用复数。
例：I‘ve read one-fifth of the books. I‘ve finished three-fifths of the words. （7）. 有关倍数表示法
两倍用twice, 三倍以上用数词+times, 要注意倍数在句子的位置。
例：The door is three times the size of this.
（8）. 十位数字（个位为零）的基数词以复数形式出现时，表示年代、年龄 例：She is a good-looking woman in her forties. (forties 指40—49岁之间) 练习题：
一、 写出下列基数词和序数词。
1________ ________ 2________ _______ 3________ ________ 5_______ _______
9________ ________ 11________ 12________ ________ 13________ ________
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20________ ________ 71________ ________ 22________ ________ 83________ ________
28________ ________ 34________ ________ 36________ 47________ ________ 二、仿照例句，用两种方式表达时间 例子： 八点十分：eight ten; ten past eight
1, 十一点四十： 2，一点十五： 3，三点四十五： 4，九点零七分： 5，五点半： 6，八点三十七： 三、用括号内所给数词的正确形式填空。 1. We are in Class________（3）.
2. We have________（12）months of the year. December is the _____________（12）one. 3. This is my________（1）bag. 4. My birthday is Dec.________（21）.
5. I have________（3）books. I like my________（3） book. 四、 选择题
1. The English for 10,440 is_________.
A. ten thousand, four hundreds and forty B. ten thousand, four hundred and forty
C. ten thousands, four hundred and forty D. ten thousand and four hundred, forty
2.of the workers in the factory is about two hundred, _________of them are women workers.
A. The number, first-third B. The number, one-third C. A number, half D. A number, three quarters
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3. --- Can you write the number eighty-five thousand, six hundred and twenty-six? --- Yes, it is_________.
A. 85662 B. 85626 C. 85006 D. 85000 4. About _________ of the books in our school library are written in Chinese. A. fouth-fifths B. four – fifth C. four –fifths D. fourths-fifth 5. The road is over _________ meters long.
A. six hundred and fifty-two B. six hundreds and fifty two C. six hundred, fifty –two D. six hundred, fifty and two 6. January _________ is New Year‘s Day.
A. one B. two C. the first D. the second 7. Take the _________ turning on your night.
A. nine B. ninth C. nineteen D. nineth 8. There are _________ days in a week.
A. the seven B. seventh C. the seventh D. seven 9. I think that the _________ century (世纪) will bring us more hopes.
A. twenty-one B. twentieth-first C. twenty-first D. twentieth-one 10. -- How many students are there in your school?
-- _________ the students in our school _________ over two thousand.
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A. The number of; is B. The number of ; are C. A number of ; is D. A number of; are
11. The new student is in_________.
A. Class 2 B. Class Second C. 2 Class D. class 2
12. --How many teachers are there in your school? -- _________, but I‘m not sure. A. Hundreds B. Hundred C. Hundreds of D. One hundred 13. _________of the teachers in our school is about one hundred, and _________of them are women teachers.
A. The number, two-thirds B. The number, two-third C. A number, half D. A number, three-quarters
14. --- Dad, when will you be free? You agreed to go to the seaside with me four days ago.
--- I am sorry, Jean. But I think I will have a _________ holiday soon. A. four-days B. four-day C. four days D. four day 15. Fan Zhiyi‘s transfer to Dundee Football Club at the end of last year aroused (激起) _______Chinese people‘s interest.
A. thousand of B. thousand C. thousands of D. thousands 16. This story happened on_________.
A. 1989, Oct 21st B. Oct. 21st, 1989 C. 21 October, 1989 D. 21st of October, 1989
17. \
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