初中英语:数词用法知多少

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1、1数词用法知多少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、除了从除了从 1-12 个基本数词(基数词)用不同的词表达外,从个基本数词(基数词)用不同的词表达外,从13-19 后都有后都有-teen 后缀。后缀。如:one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen,sixteen, seventeen, eighteen, nineteen二、从从 20

2、至至 90 之间表整十的数词都跟后缀之间表整十的数词都跟后缀-ty。如:twenty, thirty, 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,几百万,十亿用数词表示几百,几千,几百万,十亿用数词 1-9 加加hundred,thousand, million,billion 构成。构成。如:four hundred, five thousand, seven mill

3、ion, nine billion注意:几百几十之间一般用 and 连接。如:three hundred and forty- nine, six hundred and seven四、表示不确定的表示不确定的“数百数百” , “数百万数百万” , “数千数千” , “数十亿数十亿”时,时,用用“hundreds” , “thousands” , “millions” , “billions”加加“of”构成。构成。如:There are hundreds of teachers in our school.Thousands of students are studying in our s

4、chool.2The mountain is covered with billions of trees.五、表示顺序的词(序数词)除表示顺序的词(序数词)除 1-3 外,其余的后面都有后缀外,其余的后面都有后缀-th。如:first, second, third,fourth, fifth, ninth, eleventh, twelfth六、六、整十的序数词后面是由基数词变整十的序数词后面是由基数词变 y 为为 i,再加,再加 eth 构成。如:构成。如:twenty twentieth, eightyeightieth, ninetyninetieth其余的整数加个位数构成的词,只变个

5、位数为序数词即可。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-ninetwenty-ninth,forty-fiveforty-fifth,fifty-sixfifty-sixth,sixty-sevensixty-seventh,ninety-seven ninety-seventh七、序数词前一般加定冠词序数词前一般加定冠词 the,但有时加不定冠词表示,但有时加不定冠词表示“又一又一” ,“再一再一”等。等。如:I have tried twice. I want to try a third time.He has failed three times. He

6、 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。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,两倍用表示倍数的大小时,两倍用 twice 表达,三倍以上用数词加表达,三倍以上用数词加times 表达。表达。如:My school is twice as large as theirs.3Five times seven is 35.十、分数的表

7、达:分子基数词,分母序数词,分子大于分数的表达:分子基数词,分母序数词,分子大于 1,分母加,分母加s。如:1/4 one fourth,3/4 three fourths(three quarters) , 1/5 one fifth, 4/5 four fifths十一、小数的表达,小数点读作小数的表达,小数点读作 point,其余的按基数词读出。,其余的按基数词读出。如:0.2 zero point two, 5.79 five point seven nine十二、百分数的表达,百分号读作百分数的表达,百分号读作 percent。如:10% ten percent, 16% sixte

8、en percent, 0.7% point seven percent, 89%eighty-nine percent十三、数词算式表达:数词算式表达:+plus,minus,multiplied divided。如:5+7five plus seven, 93nine minus three, 89eight multiplied by nine, 648sixty divided by eight, 6:5 the ratio of six to five, 42 four squared, 33three-cubed, 54the fourth power of five十四、与数有关

9、的几个常用单词及词组。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,数个巩固训练巩固训练1. About _ of the workers are young man.A. third fifths B. three fifths C. three fives D 4three fifth2. The computer of this kind can work _ than that kind.A. hundreds of times faste

10、r B. hundred of times fasterC. hundred times faster D. a hundred time faster2. Two _ died of flu last year.A. hundred old people B. hundreds of old peopleC. hundreds of people D. hundreds old people3. He graduated in _ of _ centrury.A. the sixtieth; twenty B. sixty; the twentiethC. the sixties; the twentieth D. sixty; twenty4. The two great men wrote those letters in _.A. 1870s B. 1870s C. the 1870s D. the 18705. I wonder if I can ask him _ time.A. four B. fourth C. the fourth D. a fourth答案: 1-5 B A A C D

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