中考英语专题复习：数词

数词
定义：表示“多少”和“第几”的词，叫数词。

其用法相当于名词或者形容词。

数词分为基数词和序数词。

一．基数词的表示方法：表示数目的词是基数词。

1．最基本的数词
2．基数词1—12 是独立单词，需逐个记忆。

基数词13—19 是在个位数词的词干后加teen 构成。

其中thirteen,fifteen,eighteen 变化不规则。

基数词20—90是在十位数词后面加ty 构成。

基数词21—99是在十位数词后面加上个位数词构成，中间加上连字符“-”。

Twenty-one
3．三位数以上的基数词，在百位和十位之间，大凡要用连词“ and。

”
One thousand three hundred and forty-two
4．英语中没有“万”和“亿”，在表示“万”和“亿”时，要按十进位发来推算。

5．Hundred,thousand,millon,dosen 这些词前面如有表示详尽数字的词，它们不能加“s”反之则须加“s” .Three hundred people
二．基数词的用法
1．从句子成分上分析”基数词在句中可用作主语”宾语”表语等。

Four of
them went to the factory.
I want two .
My classmate is eighteen.
2．编号的事物用基数词。

Today we are going to study Lesson One.
3．表示“年”月”日”时年份用基数词”日期用序数词”其顺序由小到大。

Theaccident happened in 2006.
4．表示“几点钟，几点过几分”用基数词。

It 's two o ' clock.
5．用于加减乘除的数字用基数词。

One plus one is two.
6．表示大几倍或者小多少用基数词。

7．表示百分数用基数词。

Thirty percent of them is water.
8．表示分数时，分子用基数词，但分母要用序数词；若分子大于1，分母
上的序数词要用复数形式。

Two-fifths of the books are mine.
9．表示带有小数的词用基数词。

小数点前的整数按基数词的规则表示，小数点写，小数点后的数字应按其数字直接表示出来。

10．数词+名词( +形容词)作定语，名词用单数形式。

a21-year-old girl
11．两组与数词有关的介词短语：
(1)in +定冠词+数词的复数形式，表示年代
in the 1870s/1870 's
(2)in +物主代词+数词的复数形式，表示某人的年龄in one ' s thirties
三．序数词的表示方法及其用法
1．序数词是表示数目顺序的词
2．序数词一~~~十九除第一，第二，第三，第五，第八，第九，第十二变
化不规则外，其余均在基数词后加上-th3 .整十数词的序数词的构成方法是将整十位数字尾y 变成i 再加-eth
4．几十几的序数词，只要把个位数变成序数词，十位数不变。

5．序数词主要用作定语，表语，前面要加定冠词the .The fifth lesson is very
easy to learn.
1.Inourcity, ___ middleschoolstudentswanttoworkasateacher in the future.
A.thousand
B.thousand of
C.thousands of
D.two thousand of
2. __________________________Come and see me in .
A.two or three days
B.two or three day ' s time
C.two or threedays 'tim
3. Qi nghai -Tibet Railway completed last year. It is the __railwaythat conn ests
Tibet with the dther parts of China.
A.first
B.second
C.third
D.fourth
4. During the holidays, __ people came to visit the beautiful city.
A.thousand
B.several thousands
C.thousands ofB.
D.ten thousand of
5. The accident happened on ___.
A.ninedayofMarch
B.theninedayofMarch
C.ninedaysofMarch
D. the ninth of March
6. Although I failed four times, my father encouraged me to have a
___ try.
A.second
B.third
C.fourth
D.fifth
7. What number should appear next after eighty-one?
It 's _____ .392781
A.two hundred and forty-nine
B.two hundred and forty-one
C.two hundred and forty-eight
D.two hundred and forty-three
8.It took me ___ to find th ekey to the drawer.
A.one and half hours
B.one and a half hours
C.one and a half hour
D.one and half hour
9. ___ , Coca-Cola began to enter China ' s market.
A.In 1970 's
B. In 1970s
C. In the 1970s '
D. In the 1970s
10. ___________________ We all like the boy .
A.of ten years old
B.ten-year-old
C.at ten old
D. of age of ten
11. ___________________________________ Tom was ___ to get to school and I was _________________________________________ .
A.first,ninth
B.a first, a ninth
C.the first ,the ninth
D.the second ,the nineth
12. _______________________________________ Every day he begains to do his homework _____________________________________ .
A.at ten past seven
B.at seven past ten
C.on ten past seventh
D.until ten
13. ________________ We are sure the ___ century will bring us more hopes.
A.twentieth-first
B.twentieth-one
C.twenty-one
D.twenty-first
14. ________________ Now let me have .
A.the third
B.a third try
C.third try
D.this third try
15. At the age of ___,he had his own lab.
A.thirty
B.thirtieth
C.the thirtieth
D.the thirty
16. ___ aare in the army.
A.Two their sons
B.Their two sons
C.Their sons two
D.Two sons their
17. _______________________ My sister is a student of .
A.the First Class
B.Class One
C.One Class
D.Class First
18. TheGamesof___Olympicin2008willbeheldinthecityofBeijing.
A.29
B.the29
C.29th
D.the 29th。