英语数词知识点归纳
一、基数词
基数词表示数量
| one
two three four five six seven eight nine ten |
eleven
twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen |
twenty
thirty forty fifty sixty seventy eighty ninety |
twenty-one
thirty-eight fifty-three |
a hundred
a thousand a million a billion |
注意:表示具体数目的hundren, thousand, million等均不用复数,百位数和十位数之间通常加连词and;十位数与个位数之间要加连字符。
二、序数词
| first
second third fourth fifth sixth seventh eighth ninth tenth |
eleventh
twelfth thirteenth fourteenth fifteenth sixteenth seventeenth eighteenth nineteenth
|
twentieth
thirtieth fortieth fiftieth sixtieth seventieth eightieth ninetieth hundredth |
twenty-first
ninety-ninty |
a hundred and fifty-third |
序数词的缩写形式:由阿拉伯数字后加上序数词的最后两个字母。
first—1st second — 2nd tenth — 10th
三、时间和年月日表示法
1、时间均用基数词表示:
1)顺读法,先说“点钟”,再说“分钟”,如:
2:15 two fifteen 6:20 six twenty
2)逆读法
30分钟以内:“分钟数+ past +钟点数”,如:
3:20 — twenty past three 2:10 — ten past two
半小时用 half,15分钟用 a quarter :
2:15 — a quarter past two 3:30 — half past three
30分钟以外要用:“分钟数+ to + 下一个钟点”,如:
4:35 — twenty-five to five 2:55 — five to three
2)年月日表示法
年份读法;月日读法;年月日一起读法。
四、分数的表示法
当分数中表示分子的数只含个位数时一般采用“分子(用基数词)+分母(用序数词)”表示。(分子大于1时,分母序数词用复数)如:
one-third; two-thirds; three twenty-seconds
五、数词与名词的搭配
1)数词与名词连用时,它们的次序是“名词+基数词”
Lesson 15; Room 1506 或者用“the + 序数词 + 名词”
The Fifteenth Lesson the third floor
2)数词与小时的搭配
two hours and a half three hours
half an hour