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数词：
一、基数词
1.表示数量的多少
one apple一个苹果
ten rabbits十只兔子
2.基数词写法和读法
1)1~12是独立单词,需逐个记忆
one two three four five six
seven eight nine ten eleven twelve
2)13~19是个位数词的词干后加-teen构成。其中 thirteen，fifteen,eighteen，变化不规则
thirteen、 fourteen 、fifteen 、sixteen 、seventeen、 eighteen 、nineteen
3)20~90的整十数词词尾为-ty
twenty、 thirty、 forty、 fifty、sixty、 seventy 、eighty、 ninety
4)21~99之间的非整十数字是在十位数词后面加上个位数词合成，中间加上“-”
如： twenty-one 21 ninety-five 95
5）三位以上的数词，在百位和十位之间,一般要用连词and
132 one hundred and thirty-two
1,340 one thousand three hundred and forty
★表示“万”、亿的词英语中没有:ten thousand 一万；one hundred million一亿
★百、千等基数词在表示准确数目时不可用复数，如: two hundred(200), ten thousand (10,000)
★hundred,thousand+“s”,则表示约数。一般与“of”连接。
Hundred 百 thousand 千 million 百万 billion 十亿
hundreds of /2 hundred
hundreds of 数几百
thousands of 数千的
★100以上的表达一定不能漏了and，
120 one hundred and twenty 205 two hundred and five
★数字1000以上，从右往左数，每三位为一段，用逗号隔开。
1000 One thousand
1,000,000 One million
1,000,000,000 One billion
6,260,309
★dozen （12/一打） dozens of 许多，十几个
score （二十）
{课堂练习}
一、根据实际情况用适当的数词填空
1.There are __________letters in English alphabet (字母表）.
2.There are ____________days in a week.
3.There are ___________hours in a day.
4.There are___________minutes in an hour.
5.There are _________seasons in a year.
6.There are ________days in January.
8.December________ months in a year.
二、写出下列数字的基数词
20_________ 30________ 90_____________ 65__________
24_________ 135_________ 288_____________ 73__________
序数词
二、序数词：表示顺序，前面一般要加the.（第几）
1.基数词变为序数词的规则：
1)第1至第19一般是在基数词后加 th，如six-sixth:但变化特殊的有:
one-first two-second three-third, five-fifth
eight-eighth nine-ninth twelve-twelfth
2)逢十的 twenty，thirty...ninety,分别改y为ieth，
twenty--twentieth,ninety--ninetieth
3)表示第几十几或第几百几十几,只需将个位数改为序数词
Eg.thirty-one31------ thirty-first 第三十一
{exercise}
写出下列数字的序数词。
1.32_____________ 2.55_____________ 3.98___________
4.71______________ 5.189______________ 6.899___________
缩写形式为数字加序数词的最后两个字母如:first-1st;second-2nd;third-3rd;fourth-----4th
2.序数词与冠词
1)序数词前一般要加定冠词
My birthday is on the third of May.我的生日在5月38。
2)表示在原有的基础上增加,即“又一,再一”时,用不定冠词。
Shall I ask her a second time 我还要问她一次吗
3)下列4种情况不用冠词
A.序数词前已有物主代词或名词所有格时,不能再用冠词 This is Tom's second visit to China.
B.表示比赛或考试的名次时,通常省略定冠词 He was (the) second in the English exam.
C.序数词被用作副词时不用冠词
I have to finish my homework first.我得先把作业完成好。
D.在某些习语中不用冠词
at first起初 first of all首先 at first sight 乍一看
数词表示编号
表示顺序或编号，单数名词+基数词，名词的第一个字母通常要大写。
Class Two 二班 Room 12 12号房间 No.3 Middle School 第三中学
2.“单数名词+基数词”可转换成“the+序数词+单数名词”，此时名词的第一个字母不大写。
Lesson Three=the third lesson第三课
四、数词表示分数
1. 分数是由“基数词+序数词”构成，基数词作分子，序数词作分母。分子=1，可用one/a表示，序数词不用复数；分子>1时，序数词要用复数。
one/a third=1/3 seven ninths=7/9
2注意：一些特殊的分数表达法：
a half二分之一(不能说a/one second)
a quarter =one fourth 四分之一
three quarters=three fourths 四分之三
写出下列分数的英文。
1/5 __________ 3/8________ 1/10_________ 3/6_______________
五、数词表示年代/年龄段
1 .“in the+年份的复数”表示“在……世纪……年代”。
in the 1930s（加1为世纪）=in the 1930’s 在20世纪30年代
2.“in+one's+整十的复数”表示“在某人·…·…多岁时”
in his sixties在他六十多岁时
3.at the age of... 在....岁时
4.three months old 三个月大
六、数词表示日期
1.表示年份或日期，年用阿拉伯数字，日用序数词，英语表达的顺序为“月、日、年”。
eg：一九九六年三月二日的写法
2nd March,1996（英）
March 2nd, 1996(美)
数词表示时间
1.整点的表达：o'clock前用阿拉伯数字或基数词。
6点：6 o'clock 或six o' clock
8点 8 o'clock 或 eight o'clock
2.非整点表达：
1）时加分
six thirty 表示6:30
seven forty-five 表示7:45
eight O one表示8：01(0读字母o音)
用“时加分”的方式表示时间，后面决不可有o'clock。
2）分+past+时：表示“几点几 ，不超过半小时（包括半小时half)
一点一刻：a quarter past one或 one fifteen
两点半： half past two 或 two thirty
一刻(十五分)用a quarter
am. 上午 5pm. 下午五点
pm. 下午
3)分+to+时：表示超过半小时的“几点差几分”
三点四十五分：a quarter to four 或 three forty-five
七点二十：twenty past seven 或 seven twenty
九点四十：twenty to ten 或 nine forty
4）表示半的两种说法
2.5千克：two kilos and a half/two and a half kilos
八、数词表示四则运算
1.“加”用plus/add 3+5=8 3 plus 5 is 8
2.“减”用minus 12-3=9 12 minus 3 is 9
3.“乘”用multiply/times 2+3=6 2 times 3 is six “二”用is/equal表示
4.“除”用divide 30÷6=5 divide 30 by 6, and you can get 5
九、数词的其他运用
1.表示年龄。14 years old 14岁 14-year-old adj.十四岁的
in one’s forties(整十的复数)在某人四十多岁时
2.表示小数，小数点用“point”表示。eleven point two three 表示11:23
后面如果跟单位的话，前面的小数大于一的话，单位需要加s.
1.23 meters=1.23米
3.表示百分数，用percent。fifty percent:50%
The output of steel went up by twenty percent.钢铁产量增长了20%。
The output of steel went up to twenty percent. 钢铁产量增长到20%。
4.表示倍数。once表示“一倍”，twice表示“两倍”，“三倍及以上”用“基数词+times”表示。 four times:四倍
数词综合练习
一、根据括号中的数字填写合适的序数词或基数词(写单词)
1.Annie is_____ (10) years old, she is in Class________(3) Grade..
2.My birthday is on the _______（9）of May.
3.September is the _______（9）month in a year.
4.Which boy is thinner, the_________ (1)one or the_________ (2)one
5.There are____ （18) boys in our class.
二、把下列基数词改成序数词
one____ two________ three _______ nine________
fourteen_____ twenty_______ thirty-five _______ sixty-fourth_________
三、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_______
四、根据实际情况用适当的数词填空
1.There are ____________letters in English alphabet (字母表）.
2.There are ____________days in a week.
3.There are _______hours in a day.
4.There are______________minutes in an hour.
5.Thursday is the ______________day of a week.
6.There are ___________days in January.
8.December___________ months in a year.
9.There are________seasons in a year.
五、单项选择
( )1. Peng Min finally became the winner of. ____season of CCTV's Chinese Poetry Conference.
A.five B. fifth C.the fifth D.fifths
( )2. Teachers' Day is in September, the.___ month of the year.
A.nine B. ninth C.ten D.tenth
( )3. There are about eight hundred students in the school. ___ of them are boys.
A. Three fifth B. Third fifth C.Third five D. Three fifths
( )4. The number“23,456" can be read as"___.
A.twenty-three thousand, four hundred and fifty-six
B.twenty-three thousand and four hundred fifty-six
C.two three thousand and four five six
D.two three thousand,four and five six
( )5._____visitors came to take photos of Hongyadong during the vacation. A.Thousand B. Thousand of C.Thousands D. Thousands of
( )6. The ice and snow in Harbin is beautiful, so every winter. ____tourists come here.
A. two million of B.millions of C.million of D.two millions
( )7. ___of the land in that town. covered with trees and grass.
A.Two fifth ;is B. Two fifth; are C. Two fifths;is D. Two fifths; are
( )8.Today is Jack's birthday.He is. ____years old now.
A.fourteenth B.fourteen C.the fourteenth D.the fourteen
( )9.Last week,five. ____students took part in the sports meeting in our school.
A.hundred B.thousands C.hundreds of D. thousands of
( )10. My father gave me a bike on my. ___birthday.
A.ten B. a tenth C.the tenth D.tenth
( )11. The Dragon Boat Festival was____this year550358
A.June the ninth B.nine, June C. the ninth, July D. nine, July
数词专题练习
单项选择
( )1. The headmaster's office is on the___________floor.
A.one B.two C.third D.three
( )2. There are_______ months in a year.December is the _______month of a year.
A.twelve; twelve B. twelfth; twelfth C. twelve; twelfth D. twelfth; twelve
( )3. Please turn to Page_______ and take a look at the picture on it.
A.the eightieth B.Eightieth C.Eighties D. Eighty
( )4. There are____months in a year. My birthday is in the _______month.
A.twelve; twelve B.twelfth;twelfth C.twelve; twelfth D.twelfth; twelve
( )5. — Is Dongjin High-speed Railway Station the_____ largest in Hubei Province
— Yes, of course. It's just a little smaller than the largest one in Wuhan.
A.first B.second C.third D.fourth
( )6. Every year, _______books are given away to the poor children in the countryside.
thousand B. thousands of C.thousand of D.two thousands
( )7. Our country is 70 years old this year. We will celebrate her_______ birthday on Oct.1.
A.the seventieth B.seventieth C.the seventy D. seventy
( )8. There are 24 solar terms in a year. Grain Rain often starts in April, the_______ month of the year.
A.Third B.fourth C.fifth D.sixth
( )9. of the students in our class _____going to the summer camp in Beijing next week.
A. Two fifths, is B. Second fifths,are C.Second fifths, is D. Two fifths,are
( )10. —Which month of the year do you like best
— July, the_______ month,because summer vacation begin in this month.
A. Seven B.six C.seventh D.sixth
( )11. We are proud of our country.The year 2019 is her ______ birthday.
A. seventy B.the seventy C.the seventieth D.seventieth
( )12. Most of the doctors in this hospital were born ______and they are _____now.
A. in the 1970; in their fifties B. in 1970s; in the fiftieth
C. in the 1970s; in fiftieth D.in the 1970s; in their fifties
( )13. It's the _____ time for me to visit the Shunfeng Park.And I want to visit it a sixth time.
A.fifth B.five C.fifths D.the five
( )14. My family lives on______ floor of the building.
A.twelve B. the twelfth C.twelfth D.the twelve
( )15. In our class. of the students ____girls.
A. third fifths; is B. third fifth; are C.three fifth; is D.three fifths;are
二、填空题
1. We live on the_________floor.(nine)
2. This is my birthday________(eleven)
3. ---Where is the music room
--- It's next to the art room on the________ floor.(six)
4. May is the________months of a year.(five)
5. The first was not good.The ________was ever worse. (two).
6. This is a_________hand car.(two)
7. This is my__________car.(four)
8. --What's the date today
--It's_________of April.(eighteen)
Their son is a doctor.(three)
The________lesson is about water.(nine)
11. Who is the__________one (one)
12.This is the________time he get up late.(one)
13.It was the___________birthday of my grandpa’s.(sixty)
三、完成下列句子
1.3.14 reads__________
2. There are_______months in a year.
3.lama________(13岁)boy
4. At the age of______(6),she began to learn English.
5.公园离这步行十五分钟。
The park is___________from here.
6.我们学校的图书馆有五千多本书。
There are more than__________________in our school library.
7.把书翻到31页，我们一起来读课文。 Turn to_______________.Let's read the text.
8. I have a________________(five day) holiday
9. At the age of___________(7), she began to learn English.
10.There are_______________ people in the party(180)
11.现在是9点一刻钟。
It's__________________now.
12.It's 9:45 . ___________________now(同义句转换)
14. 8:45 in English is____________
14.运动会将于4月24日，星期四举行。
Our sports meeting will be held_______________
15.thirty-eleven+three=_______________.

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