词性--数词
时间：2018-12-13 作者：英语课 分类：初中语法汇总
数词(num.)： 表示数目或事物的顺序。如：one, two, three, first, second, third, fourth 1.
数词：
1、分类：数词有基数词和序数词两种。英语的数词可以作句子的主语、宾语、表语和定语。
2、基数词：表示数目的词叫基数词。
1、 英语中常用的基数词有：
1
2
3
4
5
6
7
8
9
10
11
12
one
two
three
four
five
six
seven
eight
nine
ten
eleven
twelve
13
14
15
16
17
18
19
thirteen
fourteen
fifteen
sixteen
seventeen
eighteen
nineteen
20
30
40
50
60
70
80
90
100
twenty
thirty
forty
fifty
sixty
seventy
eighty
ninety
one(a) hundred
23
35
101
twenty-three
thirty-five
one hundred and one
1000→one(a) thousand,10000→ ten thousand,100000→one hundred thousand ,1000000→one million 2,10000000→ten million, 100000000→one hundred million,
108→one hundred and eight, 146→one hundred and forty-six, 500→five hundred , 1001→one thousand and one, 1813→one thousand eight hundred and thirteen.
2、[注]：(1)百位与十位之间要加and；十万位和万位,亿位和千万位之间通常也要加and。
(2)英语用千、百万等单位计数,大数字从右向左看, 每隔三位划一逗号,倒数第一个逗号之前要用thousand,倒数第二个逗号之前要用million,倒数第三的逗号之前要用billion表示。
(3) hundred、 thousand、 million作数词时,不用复数,前面可以加上one, two, …等其它数词。用作名词时复数表示“成…上…”,后面必须要有of,前面可以加上some,many,several等词。如：five hundred(五百), hundreds of(成百上千的), ten thousand(一万), thousands of(成千上万的), millions 3 of(成百万的)
3、序数词：表示顺序的数词叫序数词。
1、 英语的序数词基本变法：
(1) 一般在基数词后加th,(2)-ve结尾的改为-fth,(3)-ty结尾的改为-tieth,(4)熟记特殊词。
2、序数词如下：
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
10th
11th
12th
※first
※second
※third
fourth
13th
14th
15th
16th
17th
18th
19th
20th
30th
40th
50th
60th
70th
80th
90th
100th
fortieth
fiftieth
sixtieth
seventieth
eightieth
ninetieth
one undredth
21st
22nd
23rd
35th
101st
twenty-first
twenty-second
twenty-third
thirty-fifth
one hundred and first
1000th→one thousandth, 1000000th →one millionth 21., 第703→the seven hundred and third,
第5480→the five thousand four hundred and eightieth.
3、注：(1)两位以上的序数词仅个位数部分用序数词,其余部分仍用基数词。如：thirty-sixth,
(2) 使用序数词时一般加定冠词the. 如：I’m in the third grade.
(3) 序数词作“几分之几”讲时,有复数形式。如：1/5→one fifth ; 2/3→ two thirds ; 4/7→ four sevenths ; 1/2→ a half ; 1/4→a quarter ; 3/4→ three quarters ; 50%→ fifty hundredths ( fifty per 23 cent).
4、数词的用法：
1、表示年份：2002: twenty thousand and two ; 1976 : nineteen seventy-six.
2、表示日期： 12月1日: Dec.1st或the first of December；2002年11月8日: Nov. 8th, 2002.
3、表示时刻： 5：15→ five fifteen或a quarter past five ; 8：30→ eight thirty或half past eight ; 10：45→ ten forty-five或a quarter to eleven.
4、表示编号：Room 105→Room one 0 five; Bus No.13→Bus Number Thirteen; P.5→Page Five; Tel.No.7658659→Telephone Number seven-six-five-eight-six-five-nine
5、小数的读法：5.7→ five point seven, 0.16 →zero point one six.
6、“半”的表达： 1/2→half, 半小时→half an hour, 1.5小时→one and a half hours或one hour and a half.
7、序数词前面加the时,表示顺序,加a/an时表示“再一、又一”。如：The third lesson is rather 24 difficult.(第三课相当难)/ Shall 25 we read the text a third time?(我们把课文读第三遍,好吗？)
- The fourth lesson is science.第四节是科学课。
- The Fourth of July is the national holiday of the US.七月四日是美国国庆日。
- I've seen it a million times.我在书上看过无数遍了。
- What will you do if you had a million dollars?如果你有一百万美元，你会干什么？
- a con man who bilked investors out of millions of dollars 诈取投资者几百万元的骗子
- A small drop in the inflation rate was cold comfort for the millions without a job. 对数百万失业者来说，通货膨胀率的微降是不起作用的安慰。
- It's the fifth door on the right.右边第五个门。
- I like to sit in about the fifth row.我想坐在第五排左右。
- He was the sixth to arrive.他是第六个到达的。
- The sixth boy in line is my brother.排第六的男孩是我的弟弟。
- July is the seventh month of the year.7月是一年中的第七个月。
- Let's start from the seventh stop. 让我们从第七站开始。
- It is on the eighth page.它在第八页上。
- August is the eighth month of the year.八月是一年中的第八个月。
- He is coming back on the ninth of May.他五月九号回来。
- September is the ninth month of the year. 九月是一年中的第九个月。
- We were working on the eleventh floor.我们在11层办公。
- I am planning to leave on eleventh.我计划十一号离开。
- It's November the twelfth.今天是十一月十二日。
- December is the twelfth month of the year.12月是一年中的第12个月。
- Let's study the thirteenth lesson.让我们学习第十三课。
- This is the thirteenth book I bought last year.这是我去年买的第十三本书。
- This is her fourteenth birthday.这是她的第十四个生日。
- It's Friday,the fourteenth of May.今天是5月14日星期五。
- Today is March the fifteenth.今天三月十五号。
- Our office is on the fifteenth floor.我们的办公室在十五楼。
- She lived on the sixteenth floor.她住在十六层楼上。
- Nala is her sixteenth children.娜拉是她的第十六个小孩。
- It was Mary's seventeenth birthday.那是玛丽的十七岁生日。
- It happened on January the seventeenth. 事情发生在1月17日。
- I will meet you on the eighteenth next month.我下月十八号和你见面。
- We had a birthday party on my eighteenth birthday.在我18岁生日时，我们举办了一个生日晚会。
- The story goes back to the middle of the nineteenth century.故事追溯到19世纪中叶。
- It happened in the nineteenth century.这事发生在十九世纪。
- Tomorrow is her twentieth birthday.明天是她二十岁生日。
- He is the twentieth on the list.在名单上他是第二十个。
- A day is about one thirtieth of a month.一天大约是一个月的三十分之一。
- I'd like to go to Shanghai on December thirtieth.我12月30号想要去上海。
- This is a map in the scale of one-millionth. 这是一张比例尺为1比100万的地图。 来自《简明英汉词典》
- Each burst of waves lasts only about a millionth of a second. 每个电波脉冲群仅持续约一百万分之一秒的时间。 来自辞典例句
- Switching times of the new type transistor is shortened by four-sevenths. 新型晶体管的开关时间缩短了七分之四。 来自互联网
- These apples cost 40 pence per pound.这些苹果每磅40便士。
- The truck was traveling under fifty miles per hour.那辆卡车以每小时不到五十英里的速度行驶着。