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1、1专题复习-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、 基数词用来表示数目，或者说表示数量的词叫基数词。最基本的基数词如下表所示：1one 11eleven 100a/one hundred2two 12twelve 20twenty 1,000a/one thousand3three 13thirteen 30thirty 1,000,000a/one million4four 14fourteen 40forty 10,000,000ten million5five 15fifteen 50fifty 100,000,000a/one hundred million6s
2、ix 16sixteen 60sixty 1,000,000,000a/one billion7seven 17seventeen 70seventy8eight 18eighteen 80eithty9nine 19nineteen 90ninety10ten说明：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: seven
3、ty-nine 81: eighty-one4. 101999 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
4、 twelve million five hundred and sixty-four thousand three hundred and one812,067,331,991: eight hundred and twelve billion sixty-seven million three hundred 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 thous
5、ands 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2直接加后缀-th 构成。 （见下表）第一到第十 第十一到第十九 第二十以上firstsecondthirdfourthfifthsixthseventheighthninthtentheleventhtwelfththirteenthfourteenthfifteenthsixteenthseventee
6、ntheighteenthnineteenthtwentieththirtiethfortiethfiftiethsixtiethseventietheightiethninetiethhundredththousandth说明：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：Im in the
7、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 year7. 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
8、 No.12课堂练习：一、写出下列数字1. 62 2. 74 3. 27 4. 59 5. 12 6. 13 7. 113 8. 275 9. 403 10. 680 11. 第 85 12. 第 111 13. 第 18 14. 第 49 15. 8888888888 16. 999999999999 二、选择适当的单词填空。1. I am the (two; second) child of my parents.32. Jack is in Class (Eight; Eighth).3. There are (fourth; four) floors in the building.4
9、. Usually it is very cold in the (one; first) month here.5. A man has (ten; tenth) fingers.6. We often have (three; third) meals every day. They are breakfast, lunch and supper.7. There are (fifty-two; fifty-second) weeks in a year.8. Today is the (two; second) day of the new term.三、用适当的数词填空。1. T is
10、 the letter in the word Christmas.2. Teachers Day is on the of September.3. Womens 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 Years Day i
11、s 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 203 B. Room 203 C. 203rd Room D. 203 Room
12、2. There were people in the park last Sunday.A. thousands B. thousand of C. thousand D. thousands of3. -Peter, how old is your father this year?- . And we just had a party for his birthday last weekend.A. Fortieth; forty B. Forty; forty C. Forty; fortieth D. Fortieth; fortieth4. There are months in
13、a year. December is the month of the year.A. twelve; twelve B. twelve; twelfth C. twelfth; twelve D. twelve; twelveth5. We had learned about English words by the end of last term.A. nine hundreds and forty-five B. nine hundreds of and forty-fiveC. nine hundred and forty-five D. nine hundred and fourty-five6. The farmer keeps cows on his farm.A. hundred B. hundred of C. hundreds D. hundreds of47. visitors come to China every year.A
