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基数词序数词练习题(含答案)

基数词序数词练习题

I.选择题。

( )1. Please turn to ______.

A. Page 11

B. the 11st page

C. page 11

D. page the 11 th

( )2. I have been to the village ________. A. a hundred time

B. hundred times

C. hundreds of times

D. hundred of times

( )3. There are ____ students in our school.

A. four—hundred and forty—five

B. four hundred and forty—five

C. four hundreds and forty—five

D. four hundred and forty five

( )4. We live in ______.

A. the twenty-first century

B. the century twenty-one

C. century twenty-one

D. the century twenty-first

( )5. 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

( )6.-How many English books are there on the table? -There is only _____English book on it.

A. a

B. an

C. one

D. the

( )7. 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 ( )8. He joined the army on ______ of May 1980.

A. 1 st

B. the 1

C. first

D. the first

( )9. March the _____ is Women’s Day.

A. eighth

B. ninth

C. tenth

D. eight

( )10. September is the _____month of the year.

A. nineth

B. ninth

C. nine

D. the twelveth

( )11. December the ____ is Christmas.

A. twenty-five

B. twenty-fifth

C. twentieth-five

D. twenty-five

( )12. Another way of saying Lesson 12 is __________.

A. Lesson ten-two

B. Lesson Ten-second

C. the Twelfth Lesson

D. Twelfth lesson II. Translation.

1. 电话号码8485308 _____________________

2. 第五册 ___________________

3. 成千上万的儿童 _____________________

4. 一个半小时 _______________________

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. 一次/二次/三次 ______________________

11.在某人60岁的时候 _____________________ 12. 在二十世纪三十年代 ____________________

13.It’s half past eight. ________________ 14. It’s a quarter to nine.___________________

15. It’s January twenty-sixth eighteen ninety-three. _____________________________________

16. 他每天早上总是第一个到校。_____________________________________________________________

17. 第三天早上玛丽没有迟到。_______________________________________________________________

18. 这本书我昨晚读了20页。________________________________________________________________

19. 最近的医院离他们学校约4—5公里。______________________________________________________

1—6. ACBADC 7—12. ADABBC

II. 完成句子：

1. It’s half past eight.

2. It’s a quarter past nine.

3. It’s a quarter to eight.

4. It was January twenty-sixth eighteen ninety-three.

III. 翻译短语和句子：

1. Telephone number/ Tel. No. eight four eight five three o eight

2. No. Sixty-four Middle School

3. thousands of children

4. half and two months/ two months and a half

5. No. 45 bus/ Bus 45

6. one third

7. four fifths

8. Room 501

9. the second floor

10. the third time 11. Book V 12. half and two weeks/ two weeks and a half

13. He is always the first to get to school every morning.

14. The third day Mary wasn’t late 15. I read 2o pages of the book yesterday evening.

16. The nearest hospital is about four to five kilometers from their school.

17. in the 1930s

一、基数词

下面把100以内的基数词分为四类。

1、第一类：

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1－99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

tenth (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、ni nth、twelth四个词的拼法。

3、第三类：

twentieth (20th) 第二十

thirtieth (30th) 第三十

fortieth (40th) 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。

基数词及序数词重要用法

1. 基数词的用法

基数词用于表示事物的数量，在表示基数词时，要特别注意hundred, thousand, million, billion等几个词的用法：若其前用了基数词，则不论其面是否有of，都必须用单数形式(此时若带of则通常表示特定范围中的一部分)；若泛指数百、数千、数百万等，则用hundreds of, thousands of, millions of 等这样的结构。如：

Two hundred of the students are needed to plant trees this morning. 今天中午需要200个学生去植树。

Hundreds of people attended the famous director’s farewell concert. 好几百人出席了这位著名指挥家的告别音乐会。

Thousands upon thousands of English words come from foreign tongues. 成千上万英语单词来自外来语。

2. 基数词的复数用法

逢整“十”的基数词的复数形式可用于表示某人的大约年岁和世纪中的年代。如：

The war broke out in the nineties. 这次战争爆发于90年代。

Karl Mark began to learn the Russian language in his fiftieth. 马克思五十多岁开始学俄语。

3. 序数词的用法

序数词用于表示事物的顺序，一般由与之相应的基数词加th构成(但有特殊形式需特别记忆)；序数词主要用作定语，前面一般要加定冠词(或物主代词)。如：

Their second son is a doctor. 他们的二儿子是个博士。

The hundredth cave that George has discovered in his lifetime is near the Alps. 乔治一生中找到的第一百个山洞在阿尔卑斯山附近。

注：序数词前有时可用不定冠词，表示“每一，又一”。如：

We’ll have to do it a second time. 我们将再做一遍。

基变序口诀基变序，有规律

词尾加上-ed(fourth,sixth)

一、二、三，特殊例，

结尾字母t,d,d(first,second,third) 八去t,九去e,(eighth,ninth)

ve要用f替;(fifth,twelfth)

ty将y改成i, th前面有个e。

若是碰到几十几，前用基来后用序。

或记忆为：一、二、三，特殊记，词尾字母t,d,d

八加h,九减e,逢十改y为ie

f要把ve替，还有th莫忘记

新标准英语初一（上）Module 1-10同义句练习题(1)

1.My favourite food is noodles.

I _________ noodles best.

2.What’s the English for this ?

What is this ________ __________ ?

3.Mrs Green has two children , Jim and Kate .

Jim is Mrs ____________ son and Kate is her ____________ .

4. My name is Ling ling .

________ ________ Ling Ling .

5.These are red flowers.

These flowers __________ __________ .

6.Can I help you?

_______ _______ I do ________ you ?

7.There is no clock on the wall .

There is ________ _________ clock on the wall .

8.Have you got any carrots ?

_______ you ________ any carrots ?

9.I’m glad to meet you , boys and girls.

___________ _________ to meet you ,boys and girls .

10.Mary likes English best .

Mary’s ________ lesso n is English .

11.I like fish best

Fish ______ ______ _______food .

12.Remember to close the door when you leave the room .

__________ _________ to close the door when you leave the room .

13.What’s the girl’s name ?

What’s the __________ ________ the girl ?

14.Would you like to go to the theatre ?

_________ __________ to the theatre .

15.His favourite food is eggs .

He __________ eggs __________ .

16.What about you?

_________ _________ __________ ?

17.Where are Tom and Jim from?

Where _______ Tom and Jim _______ from ?

18.Tom gives me a present.

Tom _________ a present _________ __________.

19.What is you favourite animals ?

What animal _______ you like ________ ?

20.The tiger is from China .

The tiger __________ __________ China .

21.What’s the time ?

________ __________ ________ ____________ ?

22.How useful the book is !

It is ________ _________ useful work .

23.Please give me the ruler .

Please give the ruler ________ ____________ .

24.We don’t have any classes at the weekend .

We have ________ __________ at the weekend .

25.We go to work at 7:30 .

We go to work at _________ ________ ________.

26.My teacher often goes to work by car .

My teacher often ____________ _________ ___________ .

27.Let’s meet at about half past one .

________ _________ meeting at about ________ __________ ? 28.What’s the price of your new bike ?

_________ ___________ is your new bike ?

29.Jim looks like Sam .

Jim and Sam __________ __________ _________ .

30.After spring , it is summer .

Summer ___________ __________ spring .

作文：

1. 根据提示描述人物

名字：Nancy 年龄:14 生日: 五月一日国籍:the USA 居住地: New York

外貌：a little short / long,curly hair / wears glasses

最爱的科目: music 最爱的运动：swimming 家庭: a brother and a sister

2. 今天是星期天，李雷不用上课，他和爸爸一起去动物园。在那里他看见很多动物，有老虎、猴子、熊猫和熊。这些动物每天都有食物喂养，但它们并不快乐，它们喜欢生活在森林，因为动物园的生活与森林中的生活不一样。

4. 今天是星期一。张老师想把一些书拿到课室。我和张明去帮他。我找到一个大箱子。我们把书装进箱子。箱子里满满的都是书。我们一起把书拿到课室去。

_________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ ___________________________

5.我的房间

这是我的房间。房间不大。在墙上有三幅画。在窗边是我的桌子。桌子上有一台电脑和一些书。我的床上放着一件外套。床底下是我的足球鞋。你还能看到什么东西吗?

6.我的朋友

我有一个好朋友。她有长长的头发，圆圆的脸，大大的眼睛和小小的嘴巴。她喜欢游泳和读书。她的英语很好，我的数学很棒。我们互相帮助，互相学习。看!她正在跳舞呢!

My friend

_________________________________________________________ _________________________________________________________ _________________________________________________________ __________________________________________________________________________________________________________________ ___________________________

7.足球是Jim最喜欢的运动。每个星期天下午他都和朋友们去踢球。他踢得很好。是学校足球队的队员。Ronaldo是他最喜欢的足球运动员。

8. 今天是星期五，天气晴朗。Lily 和Lucy 在上学。她们正在上一节数学课。她们的爸爸在上班。他是一个医生。她们的妈妈在家。她在做家务。她们的弟弟John今年三岁，他没有上学。他在和一只猫玩。

9. 格林先生从美国来。他教我们英语。他每周去上汉语课，并且学习很认真。他的两个孩子现在也在中国。他们也能说一点汉语。王叔叔是格林先生的一个好朋友。现在，他正为孩子们制造一架模型飞机。

参考答案

四

Today is Monday. Mr. Zhang wants to take some books to the classroom. Zhang Ming and I go to help him. I find a big box. We put the books in the box. The box is full of books. We carry the box to the classroom together.

五

My Room

This is my room. It’s not a big room. There are three pictures on the wall. My desk is near the window. There is a computer and some books on the desk. There is a coat on my bed. My

football shoes are under the bed. What else can you see?

六

My Friend

I have a good friend. She has long hair, a

round face, big eyes and a small mouth. She likes swimming and reading. She is good at

English. I’m good at maths. We help each other and learn from each other. Look! She is dancing!

七

Football is Jim’s favourite sport. Every Sunday afternoon, he plays football with his

friends. He is very good at playing football.

He is on the school football team. Ronaldo is his favourite football player.

八

Today is Friday. It’s a fine day. Lily and Lucy are at school. They’re having a math

lesson. Their father is at work. He is a doctor.

Their mother is at home. She is doing housework.

Their little brother John is three. He doesn’t go to school. He is playing with a cat.

九

Mr. Green is from America. He teaches us English. He has Chinese lessons every week. He studies hard. His two children is in China. They can speak a little Chinese, too. Uncle Wang is Mr. Green’s good friend. He is making a mode l plane for the children.

My friend

I have a good friend. Her name is Nancy. She is from the USA, she speaks English.She lives in New York.she is 14 years old and her birthday is on May 1 st. she is a liitle short,and has long, curly hair. She wears glasses. Her favorite subject in school is music. Her favorite sport is swimming. She has a brother and a sisiter. This is my friend! Do you like her?

1-100的英语基数词、序数词

1、基数词： 1 one 2 two 3 three 4 four 5 five 6 six 7 seven 8 eight 9 nine 10 ten 11 eleven 12 twelve 13 thirteen 14 fourteen 15 fifteen 16 sixteen 17 seventeen 18 eighteen 19 nineteen 20 twenty 21 twenty-one 22 twenty-two 23 twenty-three 24 twenty-four 25 twenty-five 26 twenty-six 27 twenty-seveen 28 twenty-eight 29 twenty-nine 30 thirty 31 thirty-one 32thirty-two 33thirty-three 34thirty -four 35thirty -five 36thirty -six 37thirty-seven 38thirty -eight 39thirty -nine 40 forty 41 forty-one 42forty-two 43forty-three 44forty -four 45forty -five 46forty -six 47forty-seven 48forty -eight 49forty -nine 50 fifty 51 fifity-one 52fifity-two 53fifity-three 54fifity -four 55fifity -five 56fifity -six 57fifity-seven 58fifity -eight 59fifity -nine 60 sixty 61 sixty-one 62sixty-two 63sixty-three 64sixty -four 65sixty -five 66sixty -six 67sixty-seven 68sixty -eight 69sixty -nine 70 seventy 71 seventy-one 72seventy-two 73seventy-three 74seventy -four 75seventy -five 76seventy -six 77seventy-seven 78seventy -eight 79seventy -nine 80 eithty. 81 eithty-one 82eithty-two 83eithty-three 84eithty -four 85eithty -five 86eithty -six 87eithty-seven 88eithty -eight 89eithty -nine 90 ninety 91 ninety-one 92ninety-two 93ninety-three 94ninety -four 95ninety -five 96ninety -six 97ninety-seven 98ninety -eight 99ninety -nine 100 one hundred 2、序数词 first (1st) second (2nd) third (3rd) fourth (4th) fifth (5th) sixth (6th) seventh (7th) eighth (8th) ninth (9th)

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基数词 1 one 2 two 3 three 4 four 5 five 6 six 7 seven 8 eight 9 nine 10 ten 11 eleven 12 twelve 13 thirteen 14 fourteen 15 fifteen 16 sixteen 17 seventeen 18 eighteen 19 nineteen 20 twenty 21 twenty-one 22 twenty-two 23 twenty-three 24 twenty-four 25 twenty-five 26 twenty-six 27 twenty-seven 28 twenty-eight 29 twenty-nine 30 thirty 31 thirty-one 序数词第1 first 第2 second 第3 third 第4 fourth 第5 fifth 第6 sixth 第7 seventh 第8 eighth 第9 ninth 第10 tenth 第11 eleventh 第12 twelfth 第13 thirteenth 第14 fourteenth 第15 fifteenth 第16 sixteenth 第17 seventeenth 第18 eighteenth 第19 nineteenth 第20 twentieth 第21 twenty-first 第22 twenty-second 第23 twenty-third 第24 twenty-fourth 第25 twenty-fifth 第26 twenty-sixth 第27 twenty-sevent h 第28 twenty-eighth 第29 twenty-ninth 第30 thirtieth 第31 thirty-firs t

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初中英语基数词序数词练习题(附答案)

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基数词与序数词对照表

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基数词与序数词详尽用法

数词又分基数词和序数词，基数词表示数量，序数词表示顺序。（2）基数词的写法 ① 21～99 的两位数，十位与个位之间用连字符“－”。例： ◇ 21 twenty－one ◇ 32thirty－two ◇ 98 ninety－eight ◇ 99ninety－nine ② 101～999的三位数，百位数和后面的数之间用连词and，百、千等数词一律用单数形式。◇ 101 one hundred andone ◇ 225 two hundred andtwenty five ◇ 999 nine hundred andninety－nine ③ 1000以上的数，从后面向前数，每三位中间点“，”，第一个“，”前为thousand，第二个“，”前为 million，第三个“，”前为billion。例： ◇ 2，567 two thousand fivehundred and sixty－seven ◇ 3，018 three thousand andeighteen （3）基数词的用法 ①作主语。例：◇ Ten is a very important number．十是一个很重要的数字。 ◇ Two and three are （is） five． 2加3等于5。 ②作定语。例： ◇ One kilometer is equal to two li． 1公里等于2华里。 ◇ She has three brothers．她有三个兄弟。 ③作宾语。例： ◇ I wanted three but he gave mefive．我想要三个，但他给了我五个。 ◇ I get up before six every day．我每天六点之前起床。 ④作表语。例：◇—What time is it几点钟啦—It’s ten．十点。（4）疑难点 hundred，thousand和million在合成数词中一般用单数形式，但是用来表示不定数目时，用作复数形式。例： ◇ Hundreds of workers will go onstrike． ◇ Thousands of people are swimming in the river．此时 hundred，thousand等词前没有数词修饰，且通常其复数形式与of 连用。 4．2 序数词的构成与用法（1）序数词的构成 ①一般来说，是由相应的基数词加词尾th构成。例： ◇ four ＋ th → fourth ◇ six ＋ th → sixth

基数词序数词练习题(含答案)教学提纲

基数词序数词练习题 I.选择题。 ( )1. Please turn to ______. A. Page 11 B. the 11st page C. page 11 D. page the 11 th ( )2. I have been to the village ________. A. a hundred time B. hundred times C. hundreds of times D. hundred of times ( )3. There are ____ students in our school. A. four—hundred and forty—five B. four hundred and forty—five C. four hundreds and forty—five D. four hundred and forty five ( )4. We live in ______. A. the twenty-first century B. the century twenty-one C. century twenty-one D. the century twenty-first ( )5. 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 ( )6.-How many English books are there on the table? -There is only _____English book on it. A. a B. an C. one D. the ( )7. 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 ( )8. He joined the army on ______ of May 1980. A. 1 st B. the 1 C. first D. the first ( )9. March the _____ is Women’s Day. A. eighth B. ninth C. tenth D. eight ( )10. September is the _____month of the year. A. nineth B. ninth C. nine D. the twelveth ( )11. December the ____ is Christmas. A. twenty-five B. twenty-fifth C. twentieth-five D. twenty-five ( )12. Another way of saying Lesson 12 is __________. A. Lesson ten-two B. Lesson Ten-second C. the Twelfth Lesson D. Twelfth lesson II. Translation. 1. 电话号码8485308 _____________________ 2. 第五册 ___________________ 3. 成千上万的儿童 _____________________ 4. 一个半小时 _______________________ 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. 一次/二次/三次 ______________________ 11.在某人60岁的时候 _____________________ 12. 在二十世纪三十年代 ____________________ 13.It’s half past eight. ________________ 14. It’s a quarter to nine.___________________ 15. It’s January twenty-sixth eighteen ninety-three. _____________________________________ 16. 他每天早上总是第一个到校。_____________________________________________________________ 17. 第三天早上玛丽没有迟到。_______________________________________________________________ 18. 这本书我昨晚读了20页。________________________________________________________________ 19. 最近的医院离他们学校约4—5公里。______________________________________________________ 1—6. ACBADC 7—12. ADABBC II. 完成句子：

基数词和序数词

基数词和序数词一．表示数目多少的词叫基数词：二．表示顺序的数次叫序数词：注意： Hundred thousand million 1.其前有具体数字时，用单数： There are thousand students in this in this school. 这所学校大约有2000名学生。 2.前无数词，模糊数字+s+of短语: Hundreds of people come to see our ’s so great. 成百的人来看我们的戏剧，它太成功了。 3.基数词变序数词口诀：基变序，很容易，结尾加上th。一二三特殊记，结尾各是t,d,d。八去t,九去e,f来把ve替，

y改为ie,结尾仍有th。若是遇到几十几，只变个位就可以。三．基数词的用法： 1.基数词在句中可用作主语、宾语、表语、定语和同位语。主语：Four of them went to the factory. 他们四个人去了工厂。宾语： I want two. 我要两个。定语： There thirty classrooms in our school. 我们学校有30个教室。表语： My classmate is eighteen. 我的同学18岁。 He is only three,and he can’t dress himself. 他只有三岁，不会穿衣服。同位语： We three will go there together. 我们3个一起去。注意：1以上的基数词作定语时，它所修饰的名词要用复数形式： The road is 16 meters in width. 这条路十六米宽。 18 American students came to our school yesterday. 昨天有18个美国学生来到我校。四．序数词的用法： 1.序数词可以在句子中当主语、宾语、定语、表语。主语： The second is what I really need. 第二个是是我真正需要的。宾语： He chose the second. 他选了第二个。定语： We are carry out the first plan. 我们将执行第一个计划。表语： She is the second in our class. 在我们班她是第二名。注意： 1.The nine students are in Class Five.这九个学生都是五班的。 2.The ninth student is in Class Five.第九个学生是五班的。 3.序数词前用不定冠词的常见情况： ①序数词前加“a”表“再一次”。 May I have a second try我能再试一次吗 Now tell me why you took a second arrow. 告诉我，为什么你手里拿着另一支箭 ②在名次中排“第几” You should try to get a first or a second in the examination.你应力争在这次考试中得个第一、二名。 ③表示任何一个“第几者”。 We don’t allow a third to have a hand in this matter. 我们不允许第三者插手此事。 ④当“分数词”用表示“几分之几”。 A third of the students failed in the exam. 三分之一的学生在这次考试中没及格。五．时间表达法： 1.顺序法 seven five 7:05 seven fifty-two 7:52 seven thirty 7：30 2.先分钟后时刻法：整点用o’clock,半点用half.＞30用to，＜30用和45分钟用quarter 15分钟) 8 o’clock 八点 half past eight . 上午八点半 a quarter to twelve 差一刻12点 twenty-nine to eight 差29分八点

英语基数词和序数词大全

一、基数词下面把100以内的基数词分为四类。 1、第一类： 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1－99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