小学英语数词讲解与练习题

数词专
练
数词是表示数量多少或顺序先后的词。

分为基数词和序数词。

一. 基数词
1. 表示数量多少的词是基数词，如：one, two, three等。

2. 数词的构成
1）从1－12分别由从one到twelve，12个各不相同的词表示。

one, two, three, four, five, six,
seven, eight, nine, ten, eleven, twelve
2）从13－19均以后缀-teen结尾。

thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen
3）从20－90的整十数词均以后缀-ty结尾。

表示“几十几”时，个位和十位之间需加连字符。

twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety
21 twenty-one 32 thirty-two 43 forty-three 4）整百数由1—9加hundred构成。

100 one (a) hundred 500 five hundred
5) 整百数和整十数之间由and连接，十位与个位之间要加连字符“-”。

如果十位数为零，那就在百位和个位之间用and连接。

101 one hundred and two 245 two hundred and forty- five 6）1,000以上的数，要用计数逗点，即从个位开始，每隔三位数加一逗点，第一个逗点处是thousand(千)，第二逗点处是million(百万) 例如：1，000→a(one)thousand
4,596→fo ur thousand five hundr ed and ninety-six
10，000→ten thousand
18,261→eighteen thousand two hundred and sixty-one
100，000→a(one)hundred thousand 766,132→seven hundred and six ty-six thousand one hundred an d thirty-two
Exercise:
写出下列数字
12 14 20
40 90
19
400
600
35
78
305
678
二、序数词
序数词表示排列顺序，如first, second, third等。

构成规则：
1) 序数词第一、第二和第三为first, second和third,其他序数词的构成是在基数词后加th。

例如：six → sixth seven →
2) fifth(第五)、eigth (第八)、ninth (第九)和twelfth (第十二)在拼法上有变化。

first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, twelfth, thirteenth, fourteenth, fifteenth, sixteenth,
seventeenth, eighteenth,
3) 二十、三十等基数词变为序数词时,要把y变成ie再加-th。

例如：
twentieth, thirtieth, fortieth, fiftieth, sixtieth, seventieth, eightieth, ninetieth
4) 基数词几十几变成序数词时,表示几十的数词不变,只把表示几的基数词变成序数词。

例如：
twenty-one →
twenty-first forty-five →
forty-
5) 第一百、第一千、第一百万、第十亿都是在基数词后直接加th构成。

例如：第一百→hundredth第一千第一百万
→millionth第十亿
6）.序数词的缩略形式是由阿拉伯数字加序数词的最后两个字母构成。

例如：
1st, 2nd, 3rd, 4th, 21st, 32nd,
7) 序数词前必须加定冠词the
The first time I came to China, I liked it very much.
我第一次来中国，我就非常喜欢这个国家。

The first is always better than
第一总是比第二好。

She will choose the third. 她将选择第三。

Exercise:
把下列基数词改成序数词。

one two
three
five nine eight
fourteen
twenty
thirty-five
三. 数词的应用
1）时刻的表示法
A、表示几点钟用基数词加可以省略的o'clock
5:00 读作five o'clock 或five B、半点的表示法
表示半点钟时，用“钟点数+ thirty”或“half+ past +钟点数”表示
2: 30 two thirty / half past two
8:30 eighty thirty / half past eighty
C、“几点几分”的表示法
（1）用“钟点数+分钟数”表示
7：10 seven ten 9：40 nine forty
（2）分钟数在30分钟以内的，用“分钟数+ past +钟点数”表示，意为“几点过几分“
7：10 ten past seven
10:15 fifteen past ten / a quarter past ten
（3）分钟数超过30分钟的，用“（60-分钟数）+ to +下一个钟点数”表示，意为“差几分到几点”
10:40 twenty to eleven 2 : 45 fifteen to three / a quarter to three
Exercise: 用英语表示下列时间
10: 05
8: 30
12:10
1:15
5:47
9:23
3:51
11:49
6:00
7:22
2) 编号的表示法
编号既可以用序数词,也可用基数词。

Lesson Ten 第十课
page 50第五十页
有的编号习惯上常用基数词。

例如：
Room 321(读作three two one)
321号房间
Tel.No.4013586(读作Telephone number four 0 one three five eight six)
电话号码4013586
遇到相同的两位数可用double,如22,可读作double two.
四、课堂练习
1）根据括号中的数字填写合适的序数词或基数词（写单词）。

1、Bill is （14）years old , he is in Class （2）Grade （6）.
2、My birthday is on the （3）of March .
3、September is the （9）month in a year .
4、Which boy is thinner , the （1）one or the （2）one ?
5、There are （55）students in our class .
2）单项选择
( )1．There are ___________ days in a year．
A．three hundred and sixty five B．three hundred and sixty-five
C．three hundreds and sixty five D．three hundreds and sixty—five
( )2．Danny lives in __________．
A．room 404 B．Room 404 C．404 room D．404 Room
( )3．Jim is in __________．
A．class one，grade six B．grade one，class six
C．Class One，Grade Six D．Grade One, Class Six
( )4．The bike cost me _________ yuan．
A．five hundred forty B．five hundreds fourty
C．five hundred and forty D．five hundred fourty
( )5．My telephone number is ____________．
A．eighty eight two forty four zero nine
B．eight eight two double four O nine
C．eighty eight two forty-four zero nine
D．eight eight two four four zero nine
( )6．Is there any food for us _________?
A．ten B．tenth C．the tenth D．the ten
( )7．Mary is _________ girl．
A. an 8 year old B．8一years—old
C．the 8 years old D．an 8一year—old
( )8．—What day is today? — ___________
A．June B．Tuesday
C．It is hot D．It’s fine
( )9．—What’s the date today? — ___________
A．It’s Saturday B．It’s July C．It’s fine D．It’s JuIy 15 ( )10．—What time do you get up every day?
A．It’s seve n
o’clock B．Seven o’clock time C．At seven D．On seven
五课后作业
（一）. 写出下列数字的英文表达。

12 14 20
45
90 . 600
678
903
115
227
1002
1320
4200
63152
.
(二)．选择填空
1. Fifty plus .
A. fourty is ninety
B. forty is ninety
C. thirty is ninety
D. fifty is ninety
2.There are students in this school.
A. four hundred fifty-two
B. four hundreds fifty two
C. four hundred and fifty-two
D. four hundreds and fifty-two
3．December is and last month in a year.
A.the
twelveth B.twelve C.t he twelfth D.twelfth
4．The bike cost me _________ yuan．
A．five hundred forty B．five hundreds fourty
C．five hundred and forty D．five hundred fourty 5．There are two ________people in the meeting room.
A.hundred
B.hundreds
C.hundreds of
D.hundred of
6．What is five and eight?
A.Twelve
B.Thirteen
C. Fourteen
D.Fifteen 7．There are ________months in a year.December is the ________month of the year.
A.twelve; twelve
B.twelve; twelfth
C.twelfth; twelve
D.twelve; twelveth
8．—What day is today? —___________
A．June B．Tuesday C．It is hot D．It’s fine 9．—What’s the date today? —___________
A．It’s Saturday B．It’s July C．It’s fine D．It’s JuIy 15 10．—What time do you get up every day?
A．It’s seven o’clock B．Seven o’clock time C．At seven D．On seven
11.I bought shoes yesterday. shoes are very beautiful.
A. a, The
B. a pair of, The
C. the, The
D. a pair, The pair
12.He was soldier in the Second World War.
A. a
B. an
C. the
D. /
13.She can play and .
A. the tennis, the guitar
B. tennis, guitar
C. the tennis, guitar
D. tennis, the guitar
14.I can see moon and clouds in the sky.
A. the, a
B. a, a
C. the, /
D. the, the
15. “c” is in “cat.”“s” is in “sat.”
A. An, An
B. An, A
C. A, A
D. A, An
16. Tian’anmen Square is in Beijing.
A. /, /
B. A, /
C. The, /
D. /, the
17.—Can you tell me nearest bookshop?
—Go straight and turn right at_______third crossing, and you will see it.
A. the, a
B. the, the
C. a, the
D. the, /。