in the 1930s. In the +年代复数 3.时间的表示 (1) 2：25 two twenty-five (2) 8: 20 twenty past eight
6: 50 ten to seven (3) a quarter=15 minutes a half =30 minutes
8:30 half past eight 8:15 a quarter past eight 7:45 a quarter to eight
----___C____. And we just had a party for his ______birthday last week
A. Fortieth , forty
B . Forty ,forty
C. Forty , fortieth
D . Fortieth, forthieth
3. ___C_ of the land in that district _____ covered with trees and grass.
数词
学习目标
一 基数词和序数词的构成。 二 基数词的用法。 三 序数词的用法。
数词概述
1.表示数目多少或顺序先后的词叫数词。数词分为基数 词和序数词。
2.基数词表示数目或数量多少。序数词表示顺序和等级。
一 基数词和序数词的构成
1.one first 11.eleven eleventh 10.ten
A.19 90s, the
B. the 1990s, /
C. 1990s, their
D. the 90s, their
2. Jack is now in __C___.
A. the three grade B. Grade Third
C. Grade Three
3.---Peter ,how old is your father this year
2.two second 12.twelve twelfth
20.twenty
3.three third 13.thirteen thirteenth 30.thirty
4.four fourth 14.fourteen fourteenth 40.forty
5.five fifth 15.fifteen fifteenth 50.fifty
10.ten tenth 20.twenty twentieth
基数词变为序数词： 一二三，特殊记 f 要把 ve 替 八减 t ,九去 e 结尾 th 不忘记 若想变为几十几， 只变个位就可以。
二基数词考点 1.有s没数字，有数字没s:
hundred,thousanrties. In one’s+年龄复数
Lesson One =the first lesson Class Three= the third Class
结构: 名词+基数词 或 the+序数词+名词
4.序数词缩写 取后两位
基础练习
1. 读出下列数字
79 999 103 第九 第四十
1,302 1,987,654,321 第五十二
2. 写出下列数字. (1)two thousand six hundred and fifty-nine _2_6_59______ (2)eighteen million two hundred and thirty thousand and sixtyeight ____1_8,_2_3_0_,0_6_8________
3.数词表示编号
Lesson One =the first lesson
结构:名词+基数词 或 the+序数词+名词
如：Page5= the fifth page
Room 21
th—e—t—we—n—ty—-f—irs—t room
4. 表示年龄 a.表示十几岁用teens指从13岁到19岁。在某人十几岁时： in one‘s teens. b.表示 “几十岁”；用 in one’s + 数词复数 in one‘s thirties 表示在某人三十几岁时 ，指从30岁到39岁。 在他五十多岁时写作——in—h—is —fift—ies—
A. Two fifth, is B. Two fifth, are C. Two fifths, is D. Two fifths, are
4. Five minus two______D___three.
c.18岁：eighteen years old d.一个十八岁的男孩：an 18-year-old boy=a boy of 18
综合演练
1.It is not rare in __D___ that people in ____ fifties are going to university
for further education.
4.数的读写 (1) 数的读法
1,987,654,321
one billion, nine hundred and eighty-seven million, six hundred and fifty-four thousand, six hundred and twenty-one
1234 1001 1100 1034 (2) 数的写法 三位一逗
三 序数词考点
1.年份、日期的表示 日期用序数，年份用基数
1949.10.1 October 1st , 1949 年份的读法 ：两位一组 1999 1900 1909 2008 2.分数的表示： （1）分子基，分母序；分子大于1,分母加s 2/5
(2) a quarter=1/4 three quarters=3/4 a half = ½ 3. 编号的表示
6.six sixth 16.sixteen sixteenth 60.sixty
7.seven seventh 17.seventeen seventeenth 70.seventy
8.eight eighth 18.eighteen eighteenth 80.eighty
9.nine ninth 19.nineteen nineteenth 90.ninety