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数词用法知多少(含答案)

日期:2024-04-30 科目:英语 类型:初中素材 查看:48次 大小:121686Byte 来源:二一课件通
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数词,用法,多少,答案
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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。 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。如: one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen,sixteen, seventeen, eighteen, nineteen21世纪教育网版权所有 从20至90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 表示几百,几千,几百万,十亿用数词1-9加hundred,thousand, million,billion构成。如:21·cn·jy·com 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- nine, six hundred and seven 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:2·1·c·n·j·y There are hundreds of teachers in our school. Thousands of students are studying in our school.【来源:21·世纪·教育·网】 The mountain is covered with billions of trees. 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, second, third,fourth, fifth, ninth, eleventh, twelfth 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, eighty→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-seven→sixty-seventh,ninety-seven→ ninety-seventh21·世纪*教育网 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. 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 2570912-1-c-n-j-y 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。如: My school is 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→ one fourth,3/4→ three fourths(three quarters), 1/5→ one fifth, 4/5 →four fifths21*cnjy*com 十一、小数的表达,小数点读作point,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percent。如: 10%→ ten percent, 16%→ sixteen percent, 0.7% →point seven percent, 89%→eighty-nine percent 十三、数词算式表达:+→plus,-→minus,×→multiplied ÷→divided。如:【来源:21cnj*y.co*m】 5+7→five plus seven, 9-3→nine minus three, 8×9→eight multiplied by nine, 64÷8→sixty divided by eight, 6:5 →the ratio of six to five, 42 →four squared, 33→three-cubed, 54→the fourth power of five【出处:21教育名师】 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21教育网 巩固训练 About _____ ... ...

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