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1、-一、知识归纳基数词变序数词的规律：口诀：基变序，有规律。一、二、三、特殊记，词尾字母t,d,d. (如：first, second, third)。 八减t,九去e,（如：eighth, ninth）, f 来把ve替。（如：twelfth）. 单词ty作结尾，ty变成tie(如：twentieth).若是碰到几十几，只变个位就可以。（如：twenty-first）1-100的序数词：1st-first；2nd-second；3rd-third；4th-fourth；5th-fifth；6th-sixth；7th-seventh；8th-eighth；9th-ninth；10th-tenth
2、；11th-eleventh； 12th-twelfth；20th-twentieth；21st-twenty-first；22nd-twenty-second；29th-twenty-ninth；30th-thirtieth；31st-thirty-first；40th-fortieth；50th-fiftieth；60th-sixtieth；70th-seventieth；80th-eightieth； 90th-ninetieth；100th-hundredth基数词序数词练习题I. Choose the best answer( )1. Please turn to _. A. Pag
3、e 11 B. the 11 st page C. page 11 D. page the 11 th( )2. At night we can see _ stars in the sky. A. thousands and thousands of B. thousand and thousands ofC. a thousand and thousands D. thousand and thousand( )3. There are some _ in our classroom. A. hundred of books B. the hundreds of books C. hund
4、reds of books D. hundred of book( )4. I have been to the village _. A. a hundred time B. hundred times C. hundreds of times D. hundred of times( )5. There are _ students in our school. A. fourhundred and fortyfive B. four hundred and fortyfive C. four hundreds and fortyfive D. four hundred and forty
5、 five( )6. The teacher told me to go over _ lessons. A. thirst three B. the three first C. three the first D. the first three( )7. May is _ of a year. A. the fifth months B. the fifth month C. the five months D. the five month( )8. We live in _. A. the twenty-first century B. the century twenty-one
6、C. century twenty-one D. the century twenty-first( )9. He said he was going to be free in _. A. one and a half hour B. one hour and half C. one and half hours D. an hour and a half( )10. -How many English books are there on the table? -There is only _English book on it. A. a B. an C. one D. the( )11
7、. Mr Smith stayed in _ last night. A. Room 403 B. the Room 403 C. the 403 room D. 403 the room( )12. The road is _. A. two thousand and five hundred metres long B. two thousands metres long C. long one thousand five hundred metre D. a thousand and five hundreds metres long( )13. He joined the army o
8、n _ of May 1980. A. 1 st B. the 1 C. first D. the first( )14. Is Sunday the _ day of the week? A. a B. one C. once D. first( )15. March the _ is Womens Day. A. eighth B. ninth C. tenth D. eight( )16. September is the _month of the year. A. nineth B. ninth C. nine D. the twelveth( )17. December the _
9、 is Christmas. A. twenty-five B. twenty-fifth C. twentieth-five D. twenty-five( )18. Another way of saying Lesson 12 is _. A. Lesson ten-two B. Lesson Ten-second C. the Twelfth Lesson D. Twelfth lessonII. Complete the sentences according to the numerals: (用past或 to的句型)1. What time is it ? (8:30) Its
10、 _. 2. What is it ? (9:15) Its _. 3. What time is it ? (7;45) Its _. 4. What was the date ? (1893年1月226日)It _.III. Translate the following into English:1. 电话号码8485308 _ 2. 第六十四中学 _3. 成千上万的儿童 _ 4. 两个月半 _5. 45路公共汽车 _ 6. 三分之一 _7. 五分之四 _ 8. 第501房间 _9. 第二层 _ 10. 第三次 _11. 第五册 _ 12. 两周半 _13. 他每天早上总是第一个到校。_
11、14. 第三天早上玛丽没有迟到。_15. 这本书我昨晚读了20页。_.16. 最近的医院离他们学校约45公里。_17. 在二十世纪三十年代 _ 18. 中华路21号_ 参考答案：I. 选择题15. AACCB 610. DBADC 1115. DADDA 1618. BBC II. 完成句子： 1. Its half past eight. 2. Its a quarter past nine. 3. Its a quarter to eight. 4. It was January twenty-sixth eighteen ninety-three. III. 翻译短语和句子： 1. Te
12、lephone number/ Tel. No. eight four eight five three o eight2. No. Sixty-four Middle School 3. thousands of children 4. half and two months/ two months and a half 5. No. 45 bus/ Bus 456. one third 7. four fifths 8. Room 501 9. the second floor10. the third time 11. Book V 12. half and two weeks/ two
13、 weeks and a half 13. He is always the first to get to school every morning.14. The third day Mary wasnt late 15. I read so pages of the book yesterday evening.16. The nearest hospital is about four to five kilometers from their school.17. in the 1930s 18. 2 Zhonghua Road一、基数词下面把100以内的基数词分为四类。1、第一类：
14、one一two二three三four四five五six六seven七eight八nine九ten十eleven十一twelve十二这一类共计十二个单词，在结构上与其他的基数词相比较是特殊的，就象不规则的动词一样，要求逐个的硬背下来，这对学好其他的基数词和序数词都是及其重要的。 2、第二类：thirteen十三fourteen十四fifteen十五sixteen十六seventeen十七eighteen十八nineteen十九这一类基数词共有七个。它们在结构上有两个特点：一是在发音方面都有两个重音；二是在拼法上都有后缀teen。除了thirteen和fifteen之外，都是纯粹地在另一个基数词的
15、后面加上后缀teen。但要注意eighteen的拼法，eight本身有t字母，因此只加een。 3、第三类：twenty二十thirty三十forty四十fifty五十sixty六十seventy七十eighty八十ninety九十这类基数词共有八个。都是十位的整数，均以后缀ty结尾。其中sixty、seventy、eighty、ninety基本上是在相应的基数词后面加上后缀ty。但要注意eighty的拼法，eight本身有t字母，因此只加y。 4、第四类：这一类和很简单，可以看成是一种合成词。其结构方式是：用十位整数加上个位整数，其间用连字符号“”连接，表示“几十几”。这类基数词的变化都是规
16、则的。如：twenty-one二十一forty-six四十六seventy-eight七十八ninety-five九十五二、序数词下面把199的序数词也分为四个类。1、第一类first(1st)第一second(2nd)第二third(3rd)第三（在括号里的是缩写形式，均在阿拉伯数字后面加上相应序数词的最后两个字母构成，以下各类与此相同。）这类序数词只有三个，在整个序数词里面是特殊的，就和第一类基数词一样，需要逐个地硬记下来。 2、第二类：fourth(4th)第四fifth(5th)第五sixth(6th)第六seventh(7th)第七eighth(8th)第八ninth(9th)第九t
17、enth(10th)第十eleventh(11th)第十一twelfth(12th)第十二thirteenth(13th)第十三fourteenth(14th)第十四fifteenth(15th)第十五sixteenth(16th)第十六seventeenth(17th)第十七eighteenth(18th)第十八nineteenth(19th)第十九这一类序数词共有十六个。均在相应的基数词后面加上后缀th构成。要注意其中fifth、eighth、ninth、twelth四个词的拼法。 3、第三类：twentieth(20th)第二十thirtieth(30th)第三十fortieth(40t
18、h)第四十fiftieth(50th)第五十sixtieth(60th)第六十seventieth(70th)第七十eightieth(80th)第八十ninetieth(90th)第九十这一类全是十位整数的序数词，共八个。它们的构成方法是：先将相应的十位整数的基数词词尾ty中的y改成i，然后在加上后缀eth。 4、第四类：thirty-first(31th)第三十一sixty-second(62nd)第六十二eighty-seventh(87th)第八十七ninety-eighth(98th)第九十八这类表示“第几十几”的序数词，跟表示“几十几”的基数词一样简单。在构成方法上均由基数词“几十几”变化而来，十位数不变，仅把个位上的基数词变成序数词就行了。-第 8 页-