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英语数词词汇的整理
数词是表示数量或顺序的词,大家对英语中的数词都了解吗?下面是小编为大家整理了一些关于英语数词的词汇,一起来看看吧,希望对大家有帮助。
基数词
1)基数词写法和读法: 345 three hundred and forty-five;
2)基数词一般是单数形式,但下列情况,常用复数:
a. 与of 短语连用,表示概数,不能与具体数目连 用,如scores of people 指许多人;
b. 在一些表示"一排"或"一组"的词组里;
如:They arrived in twos and threes. 他们三三两两的到达了。
c. 表示"几十岁";
d. 表示"年代",用 in +the +数词复数;
e. 在乘法运算的一种表示法里,如:3 x 5 = 15 Three fives is (are) fifteen.
序数词
序数词的缩写形式: first---1st second---2nd thirty-first---31st三、 数词的用法
1)倍数表示法
a. 主语+谓语+倍数(或分数)+ as + adj. + as
I have three times as many as you. 我有你三倍那么多。
b. 主语+谓语+倍数(分数)+ the size (amount,length…) of…
The earth is 49 times the size of the moon. 地球是月球的49倍。
c. 主语+谓语+倍数(分数)+ 形容词(副词)比较级+ than…
The grain output is 8 percent higher this year than that of last year.
今年比去年粮食产量增加8%。
d. 还可以用by+倍数,表示增加多少倍
The production of grain has been increased by four times this year.
今年粮食产量增加了4倍。
2)分数表示法
构成:基数词代表分子,序数词代表分母。分子大于1时,分子的序数词用单数,分母序数词用复数:
1/3 one-third ; 3/37 three and three-sevenths.
序数词(Ordinal Number)表示排列的顺序,如:
The first time I saw him was yesterday.
第一 first 第十三 thirteenth
第二 second 第十四 fourteenth
第三 third 第十五 fifteenth
第四 fourth 第十六 sixteenth
第五 fifth 第十七 seventeenth
第六 sixth 第十八 eighteenth
第七 seventh 第十九 nineteenth
第八 eighth 第二十 twentieth
第九 ninth 第二十一 twenty-first
第十 tenth 第二十二 twenty-second
第十一 eleventh
第二十三 twenty-fourth
第十二 twelfth 第二十四 twenty-fourth
英语基数词变序数词顺口溜
基数词变序数词
基变序,很容易,
一二三,特殊记,
th从四起,
八去t来九去e,
遇到ve,f替,
ty变为tie,后加th莫迟疑,
若想表示几十几,只变个位就可以。
时间介词巧记歌
年、月、季节前须用in(如:in 2008, in September, in spring),日期前面行不通,
遇到几号改用on(如:on January 1),
上午、下午、晚上仍用in(如:in the morning/afternoon/evening),
若是某日上下午,也是用on才能行(如:on the evening of the Mid-autumn Day),
正午、夜里用at(如:at noon, at night),
时、分用法也同理(如:, at two, at two),
如若“差”点须加to(如:two to two)
如若“过”点改past(如:half past one),
多说勤练牢牢记,学好英语非儿戏。
数词的其他用法
1. 小数的表达
小数点左边的数通常按基数词来读,若为三位以上的数,也可按编码式读法读出,即将数字单个读出;小数点右边的数通常按编码式读法单个读出。
6.86 six point eight six
14.15 fourteen point one five
345.456 three four five point four five six
345.456 three hundred and forty-five point four five six
0在小数中通常读作zero,也可读作字母o。如:
9.07 nine point o(zero) seven
2. 倍数的表达
用基数词加times表示,如:
Productivity has increased three times.
The girl is ten times cleverer than her brother.
Americans eat twice as much proteinas they actually need every day.
3. 百分数的表达(其中的百分号%读作percent)
6%读作:six percent
0.6%读作:zero point six percent
500%读作:five hundred percent
12.34%读作:twelve point three four percent
4. 分数的表达
a, 较小分数的一般读写方法。如:
1/3 one-third
2/3 two-thirds
3/5 three-fifths
b, 较复杂分数的简明读写方法。如:
22/9 twenty-two over nine
43/97 forty-three over ninety-seven
c, 整数与分数之间须用and连接。如:
四又二分之一 four and a half
九又五分之二 nine and two fifths
5. 数学运算的表达
6+5=11
Six plus five is eleven.
或 Six and five is eleven.
11-6=5
Eleven minus six is five.
或 Six from eleven is five.
4×5=20
Four multiplied by five is twenty.
或 Four times five is twenty.
20÷4=5
Twenty divided by four is five.
或 Four into twenty goes five.
15:5=3
The ratio of fifteen to five is three.
2的2次方是4 Two squared is four.
2的3次方是8 Two cubed is eight.
2的4次方是16 The fourth power of two is sixteen.
a > b a is more than b.
a < b a is less than b.
a ≈ b a approximately equals to b.
a ≠ b a is not equal to b.
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