1、第2讲数词Mister Smith is sixty years old and yesterday was his 60th birthday.He still remembers in the 1990s when he was in his thirties，he drank dozens of bottles of beer a day.However，he spent thousands of dollars in hospital.Later，two fifths of his spare time was spent in taking exercise.规则感悟数词的基本形式为
2、基数词。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。“in the逢十的基数词的复数”表示“在某个世纪几十年代”。“in ones逢十的基数词的复数”表示“在某人几十多岁时”。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。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 th
3、irds。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。Woul
4、d 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1Peter got a model ship from his uncle on his thirteenth(thirteen) birthday.2Two thirds(three) of the students in our class have been to Disneyland.3Linda，
5、there are too many mistakes in the ninth(nine) line of your passage.4He made quite a few friends during his twenties(twenty)5It is reported that the earthquake has left thousands(thousand) of people homeless.1Without a second(two) thought，he agreed to join the club.230% of the river has been polluted(pollute) by the water from the factory already and many fish have disappeared.3Then，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)
