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英语数词用法


﹥30分钟
分钟逢15 即 一刻钟 简化法
(60-分钟) + to + (小时 + 1)
a quarter
按顺序读基数词
4:40 twenty to five
5:15 a quarter past five 6:45 a quarter to seven
7:50 seven fifty
二、加减乘除表示法
✓320 three hundred and twenty ✓There are hundreds of people in the hall.
2. 序数词 A.第一至第十九 特殊: first, second, third, fifth,eighth, ninth, twelfth 其他: 添加“-th”。如 sixth、nineteenth.
exercise
1.写出下列词的序数词形式
1.one first 2.two second 3.six sixth
4.five fifth 5.nine ninth 6.twelve twelfth
7.eight eighth 8.twenty-one twenty-first
2.写出下列词的基数词形式。
B.从 11—19 eleven,twelve, thirteen, fourteen,
fifteen, sixteen, seventeen,eighteen, ninewenty,thirty, forty,fifty,sixty, seventy, eighty ,ninety 21:twenty-one 56:fifty-six
-It’s B of September. A. 26th B. the 26th C. twenty-six 3. There are D days in a week. A. the seven B. seventh C. the seventh D. seven
exercise
4.Sunday is the B day of a week. A. one B. first C. second
D.百位数
101 one hundred and one
178 one hundred (and) seventy-eight E.千位数以上 thousand千 million百万 billion十亿 4,000:four thousand
2,000,000:two million
6,000,000,000:six billion F.基数词表示确切的数时,不用复数形式. 表示不确切数,如成百、成千上万,则用复 数。
5.Twenty-eight minus(减)six is B . A. the twenty- second B. twenty- two C. twenty- second
6. Four plus(加) B is twelve. A. seven B. eight C. nine
数词的用法
一、时刻表示法
序数词构成规律口诀
基变序,有规律, 一二三特殊记,词尾字母t, d, d, 加th从4起,(fourth, sixth) 八去“t”,九去“e”, “f”来把“ve”替,(fifth, twelfth) 单词“ty”作结尾,“ty”变成“tie”, (twentieth, thirtieth,…ninetieth) 若是遇到几十几,只变个位就可以。(fifty-fifth) 序数词缩写记清楚,数字后跟两字母 (first—1st second—2nd third—3rd fourth—4th twentieth—20th twenty-third—23rd ).
B.从第二十至第九十九
变y为i,再加“eth”构成。
twenty——twentieth thirty——thirtieth
☆表示第几十几时,用几十的基数词+“-”+个位序数
词。
thirty-first 第三十一
fifty-sixth 第五十六
seventy-third 第七十三 ninety-ninth 第九十九
1.third three 2.fourth four 3.tenth ten 4.twentieth twenty 5.nineteenth nineteen 6.thirty-first thirty-one _
exercise
3.选择
1. My cousin’s birthday is on the B of October. A. three B. first C. the second 2. -What date is it today?
★五、数词
一、 数词的分类
数词分基数词和序数词两类。
表示数目多少的数词叫做基数 词,如:one, ten, fifteen 等;
表示顺序先后的数词叫做序数词,如 second, fifth, twelfth等。
1. 基数 A.从1—10
one,two,three,four,five,six,seven, eight,nine,ten
数词的表示法 — 时间 表示在几点钟用介词 at
时间类型
表示法

读法
整点
基数词(+ o’clock) 1:00 one o’clock
﹤30分钟 分钟 + past +小时 2:10 ten past two
= 30 分钟 half + past + 小时 3:30 half past three
1. 几点钟 5:00 读作 five o’clock 2. 几点过几分
five past seven 七点过五分 half past six 六点半 a quarter past eight 八点过一刻 3. 几点差几分 ten to eight 差十分八点 a quarter to twelve 差一刻十二点 twenty to six 差二十分六点
1. “加”用plus,and或add表示
✓How much is two plus three? It is five. Two and three is equal to five.
2. “减”用 minus
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