(人教版)高考英语一轮复习课时学案 第2部分 语法专题 专题2　第2讲　数词 (含解析)

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。

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)