中考英语复习---数词表示数目和顺序的词叫数词。
数词可以分为基数词和序数词。
一、 基数词1. 11-19是由个位数加后缀-teen 构成。
注意12,13,15,18的拼写。
2. 20-90（整十）是由个位数加后缀-ty 构成。
注意20,30,40,50和80的拼写。
3. 其他非整十的两位数（21-99）是由整十数加连字符“-”，再接个位数构成。
Eg. 35: thirty-five 79: seventy-nine 81: eighty-one4. 101—999先写百位数，后加and ，再写十位数和个位数。
（百位与十位之间必须加and ）Eg. 108: one hundred and eight 691: six hundred and ninety-one5. 1001及以上数字：数字从右往左看，每隔三位划一逗号，倒数第一个逗号前加thousand,倒数第二个逗号前加million ，倒数第三个逗号前加billionEg. 1,954: one thousand nine hundred and fifty-four712,564,301: seven hundred and twelve million five hundred and sixty-fourthousand three hundred and one812,067,331,991: eight hundred and twelve billion sixty-seven million threehundred and thirty-one thousand nine hundred and ninety-one6. “hundreds ”, “thousands ”,”millions ” 后加of 表示大量的不确定的数目：Eg: hundreds of people 数以百计的人 thousands of trees 成千上万的树 而表示确定的大量数目则直接用基数词，其后不加s ，也不加of:Eg: two hundred students 两百个学生 five thousand years 五千年二、 序数词序数词用来表示数词的顺序，除特殊情况外，序数词一般都是直接在基数词后直1. 英语表示第一、第二、第三的序数词属于特殊形式：first second third2. –ve结尾的改为fth3. –ty结尾的改为tieth4. 两位数以上的序数词，仅个位数部分用序数词，其余部分仍用基数词。
Eg. fifty-first(第五十一) forty-eighth(第四十八)6.使用序数词时一般在前面加定冠词the，如：I’m in the third grade.但当名词前有物主代词、指示代词修饰时，the 一定要省略。
如：in his third year 7.序数词可缩写为阿拉伯数字加序数词最后两个字母。
Eg. 第一(the) first(1st) 第二(the)second(2nd) 第三(the)third(3rd) 第九十七(the)ninety-seventh(97th)第一百零一(the)one hundred and first(101st)8.编了号的事物要用基数词表示顺序，但是基数词要后置。
第三十二页：Page 32 第305房间：Room 305第五课：Lesson Five 第12路公汽：Bus No.12数词的用法：1.分数表达法：基数词做分子，序数词作分母;当分子超过1时，分母要加“s”.Eg: 1/5: one fifth 2/3: two thirds 1/2: one/a half1/4: a quarter/ one fourth 3/4: three quarters/ three fourths2. 年月日表达法：(1)年份用基数词表达，分两位一读。
Eg: 1999: nineteen ninety-nine 2000: two thousand2001: two thousand and one2012: twenty twelve/ two thousand and twelve年份前用介词in, 如：在1998年：in 1998(2)月份名称的第一个字母都要大写，有些月份名称有缩写形式。
一月January(Jan) 二月February(Feb) 三月March(Mar)四月April(Apr) 五月May 六月June 七月July八月August(Aug) 九月September(Sep) 十月October(Oct)十一月November(Nov) 十二月December(Dec)表示在某个月，用介词inEg. in October in July 2003：在2003年7月(3)日期的表达法，日期前要用介词onon June 1st：在六月1号读作：on June (the) first(4)年月日的表达法：表示某年某月某日，按“月份+日期+年份”或以“日期+月份+年份”写，年份前加逗号隔开。
年月日前面用介词onEg: on 15 August, 2003或on August 15th, 2003：在2003年8月15日(5)年代和年龄表达法：A. “in+the+数词的复数形式”，表示年代。
Eg.in the 1870s 或in 1870’s (在19世纪70年代，读作：eighteenseventies)B. “in+物主代词+数词的复数形式”，表示“在某人……多少岁时”Eg. in his twenties(在他20几岁时)3.时刻表达法：(时刻前用介词at)(1) 表示整点时间，后面可以加o’clock, 也可以不加o’clock而表示非整点时间，后面绝对不能加o’clockEg. at nine(o’clock) 在九点(2)非整点时间（几点几分）表达法：A. 可用基数词按顺序表达，也可以用介词past 或to 来表达。
若分钟数少于30，用“分钟数+past+小时数”若分钟数大于30，用“（60-分钟数）+to+(小时数+1)”Eg. at 6:18---at six eighteen或at eighteen past sixEg. at 8:55---at eight fifty-five或at five to nineB. a quarter=fifteen minutesEg. 9:15---nine fifteen或fifteen past nine或a quarter past fifteenEg. 9:45---nine forty-five或fifteen to ten或a quarter to ten4.半数表达法：a/one half 一半half an hour半个小时one and a half hours=one hour and a half(一个半小时)two and a half hours=two hours and a half（两个半小时）课堂练习：一、写出下列数字1. 622. 1133. 6804. 第855. 999999999999二、选择适当的单词填空。
1. I am the (two; second) child of my parents’.2. Jack is in Class (Eight; Eighth).3. There are (fourth; four) floors in the building.4. Usually it is very cold in the (one; first) month here.5. A man has (ten; tenth) fingers.6. Today is the (two; second) day of the new term.三、用适当的数词填空。
1. ‘T’ is the letter in the word ‘Christmas’.2. Teachers’ Day is on the of September.3. Women’s Day is on the of March.4. There are days in a week.5. Autumn is the season of a year.6. November is the month of a year.7. Tom is nine years old. Today is his birthday.8. There are seasons in a year.9. New Year’s Day is the day of a year.10. There are months in a year.11. The month of a year is May.12. There are minutes in an hour.13. Half of one hundred is .14. There are letters in English alphabet(字母表).15. There are days in February.课后练习：单项选择：1. He lives in .A. the Room 203B. Room 203C. 203rd RoomD. 203 Room2. There were people in the park last Sunday.A. thousandsB. thousand ofC. thousandD. thousands of3. ---Peter, how old is your father this year?--- . And we just had a party for his birthday last weekend.A. Fortieth; fortyB. Forty; fortyC. Forty; fortiethD. Fortieth; fortieth4. There are months in a year. December is the month of the year.A. twelve; twelveB. twelve; twelfthC. twelfth; twelveD. twelve; twelveth5. We had learned about English words by the end of last term.A. nine hundreds and forty-fiveB. nine hundreds of and forty-fiveC. nine hundred and forty-fiveD. nine hundred and fourty-five6. The farmer keeps cows on his farm.A. hundredB. hundred ofC. hundredsD. hundreds of7. visitors come to China every year.A. Thousands ofB. Ten thousandsC. Ten thousand ofD. Thousand of8. ---Have you seen the CCTV news on TV?---Yes, children had a good festival on the Children’s Day.A. millions of; sixtyB. ten million; sixtyC. millions of; sixtiethD. ten millions; sixtieth9. Father’s Day is on Sunday of June.A. threeB. thirdC. the thirdD. the three10. The number 999 reads nine .A. hundreds and ninety ninthB. hundreds and ninety-nineC. hundred ninety and nineD. hundred and ninety-nine11. The word in the word “possible” is “i”.A. fiveB. secondC. twoD. fifth12. ---What’s the population of China?---It’s about .A. thirteen billionB. one billion, three thousand millionC. twelve billion, hundred millionD. one billion, three hundred million13. ---Good news! Bill won medal in the long jump just now.---Really? That’s his one at our sports meeting.A. a; fourB. an; fourthC. a; fourthD. an; four14. Today is my mother’s birthday. I will buy her a gift.A. fourteenB. fourteenthC. fortyD. fortieth15. More than two years ago, people knew little about the universe.A. thousandsB. thousandC. thousand ofD. thousands of课堂练习：一、写出下列时间（除整点外，其它时间写出两种表达方式。