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高中资料公众号：网盘网课资源
第2 讲 数词
Mister Smith is sixty① years old and yesterday was his 60th② birthday.He still remembers
in the 1990s③ when he was in his thirties③，he drank dozens of④ bottles of beer a
day.However，he spent thousands of④ dollars in hospital.Later，two fifths⑤ of his spare time
was spent in taking exercise.
[规则感悟] ①数词的基本形式为基数词。②表示数词的顺序往往用序数词。大部分是在基
数词的基础上加-th。以-y 结尾的基数词变序数词，把-y 变成-ie 再加-th。③“in the＋逢十的
基数词的复数”表示“在某个世纪几十年代”。“in one’s＋逢十的基数词的复数”表示
“在某人几十多岁时”。④具体数字＋dozen/score/hundred/thousand/million 等词时，后面直
接加名词复数；表示笼统数目时，用dozens/scores/hundreds/thousands/millions of＋名词复数。
⑤分数表达：分子用基数词，分母用序数词。当分子大于1 时，分母序数词加-s，如：1/3：
one third,2/3：two thirds。
1．易错基数词
thirteen 十三 fourteen 十四 fifteen 十五 eighteen 十八 nineteen 十九 twenty 二十 thirty
三十 forty 四十 fifty 五十 ninety 九十
2．易错序数词
first 第一 second 第二 third 第三 fourth 第四 fifth 第五 eighth 第八 ninth 第九
eleventh 第十一 twelfth 第十二
3．序数词的使用
(1)序数词在句中主要作定语，一般情况下序数词前要加定冠词。
Monday is the second day of a week.
星期一是一周的第二天。
(2)序数词前有时加不定冠词，表示“又一、再一”，相当于another。
Would you like a second cup of tea?
你还想再来一杯茶吗？
I had a fourth apple.
我(吃了三个苹果后)又吃了一个苹果。
(3)有时序数词作状语，不加冠词。
He came out first in the contest.
他在比赛中获得第一名。
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高中资料公众号：网盘网课资源
对点练习
1．Peter got a model ship from his uncle on his thirteenth(thirteen) birthday.
2．Two thirds(three) of the students in our class have been to Disneyland.
3．Linda，there are too many mistakes in the ninth(nine) line of your passage.
4．He made quite a few friends during his twenties(twenty)．
5．It is reported that the earthquake has left thousands(thousand) of people homeless.
1．Without a second(two) thought，he agreed to join the club.
2．30% of the river has been polluted(pollute) by the water from the factory already and many
fish have disappeared.
3．Then，when I was in the fifth(five) grade ，I wanted to be a teacher because I liked my
English teacher very much.(2019·全国Ⅱ)
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