2018军校招生备考英语——数词解析(2)
1、 英语的序数词基本变法:
(1) 一般在基数词后加th,(2)-ve结尾的改为-fth,(3)-ty结尾的改为-tieth,(4)熟记特殊词。
2、序数词如下:
1st |
※first |
13th |
thirteenth
|
20th |
twentieth |
21st 35th
101st |
twenty-first thirty-fifth
one hundred and first |
1000th→one thousandth, 1000000th →one millionth., 第703→the seven hundred and third,
第5480→the five thousand four hundred and eightieth.
3、注:(1)两位以上的序数词仅个位数部分用序数词,其余部分仍用基数词。如:thirty-sixth,
(2) 使用序数词时一般加定冠词the. 如:I'm in the third grade.
(3) 序数词作"几分之几"讲时,有复数形式。如:1/5→one fifth ; 2/3→ two thirds ; 4/7→ four sevenths ; 1/2→ a half ; 1/4→a quarter ; 3/4→ three quarters ; 50%→ fifty hundredths ( fifty per cent).
4、数词的用法:
1、表示年份:2002: twenty thousand and two ; 1976 : nineteen seventy-six.
2、表示日期: 12月1日: Dec.1st或the first of December;2002年11月8日: Nov. 8th, 2002.
3、表示时刻: 5:15→ five fifteen或a quarter past five ; 8:30→ eight thirty或half past eight ; 10:45→ ten forty-five或a quarter to eleven.
4、表示编号:Room 105→Room one 0 five; Bus No.13→Bus Number Thirteen; P.5→Page Five; Tel.No.7658659→Telephone Number seven-six-five-eight-six-five-nine
5、小数的读法:5.7→ five point seven, 0.16 →zero point one six.
6、"半"的表达: 1/2→half, 半小时→half an hour, 1.5小时→one and a half hours或one hour and a half.
7、序数词前面加the时,表示顺序,加a/an时表示"再一、又一"。如:The third lesson is rather difficult.(第三课相当难)/ Shall we read the text a third time?(我们把课文读第三遍,好吗?)
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