数词用法知多少

1、数词用法知多少近几年的中考中，经常有涉及数词方面的知识,也是学生经常出错的地方。本文就数词的用法作一归纳 ,供大家在复习中参考。一、除了从 1-12个基本数词（基数词）用不同的词表达外，从 13-19 后都有-teen后缀。女口： one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen， fourteen， fifteen ，sixteen， seventeen， eighteen， nineteen二、从20至90之间表整十的数词都跟后缀-ty。如：twenty， thirty ，

2、 forty ， fifty ， sixty， eighty， ninety 表示“几使几”用整十加个位数构成，中间用连字符“-”。如：twenty-one， thirty-two ， forty-three ， fifty-four ， ninety-six三、表示几百，几千，几百万，十亿用数词 1-9 加 hundred， thousand， million，billion 构成。 如：four hundred， five thousand， seven million， nine billion注意：几百几十之间一般用 and连接。如：three hundred and forty- n

3、ine， six hundred and seven四、表示不确定的“数百”，“数百万”，“数千”，“数十亿”时，用“hundreds，“thousands， “millions”，“billions” 加“ of” 构成。 如：There are hundreds of teachers in our school.Thousands of students are studying in our school.The mountain is covered with billions of trees.五、表示顺序的词（序数词）除 1-3 外，其余的后面都有后缀 -th。 如：first

4、， second， third，fourth， fifth ， ninth ， eleventh， twelfth六、整十的序数词后面是由基数词变y为i,再加eth构成。如：twenty twentieth,eight尸eightieth,ninety ninetieth其余的整数加个位数构成的词,只变个位数为序数词即可。 如： twenty-nine twenty-ninth , forty-five forty-fifth , fifty-six fifty-sixth , sixty-seve n sixty-seve nth , nin ety-seve n ninety-sevent

5、h七、序数词前一般加定冠词the,但有时加不定冠词表示“又一”， “再一”等。 如：I have tried twice. I want to try a third time.He has failed three times. He will try a fourth time.八、数词与名词连用时，如几号，几班，几年级，房间号及邮编号 码时，首字母都大写。 如：Number One， Class Three， Grade Two， Room 218， Zip Code 257091九、表示倍数的大小时，两倍用 twice 表达，三倍以上用数词加times表达。女口：My school i

6、s twice as large as theirs.Five times seven is 35.十、 分数的表达：分子基数词，分母序数词，分子大于 1，分母加 s如：1/4宀 one fourth, 3/4宀 three fourths (three quarter) 1/5宀 one fifth ,4/5 t four fifths十一、小数的表达，小数点读作 point，其余的按基数词读出。女口：0.2 tzero point two， 5.79 tfive point seven nine十二、百分数的表达，百分号读作 percent女口：10%t ten percent，16%t

7、sixteen percent， 0.7% tpoint sevenpercent, 89%teighty-nine percent十三、数词算式表达：+ tplus,T minus,x multiplied - divided。 如：5+7tfive plus seven, 9 3tnine minus three, 8x 9teight multiplied by nine , 64 8tsixty divided by eight, 6:5 tthe ratio of six to five ， 42 tfour squared， 33tthree-cubed， 54tthe fourt

8、h power of five十四、 与数有关的几个常用单词及词组。 如：half 一半， a dozen 一打， dozens of 几十， a score 二十， scores of许多， several (a few),几个，数个巩固训练1. About of the workers are young man.A. third fifthsB. three fifthsC. three fivesD three fifth2. The computer of this kind can work than that kind.A. hundreds of times fasterB.

9、hundred of times fasterC. hundred times fasterD. a hundred time faster2. Two died of flu last year.A. hundred old peopleB. hundreds of old peopleC. hundreds of peopleD. hundreds old people3. He graduated in of centrury.A. the sixtieth; twentyB. sixty; the twentiethC. the sixties; the twentiethD. sixty; twenty4. The two great men wrote thos