文档介绍：数词
热身练****br/>1. _______ tress were planted on the mountain last year.
A. Thousands of B. Thousand of
C. Five tho、三，特殊记，面目全非要注意，
加th从4起，
八少“t”，九去“e”，
“ve”要用“f”替，(five, twelve)
见“y”变成“i”和“e”，词尾加上“th”，
(twenty, thirty,……ninety)
若是遇到几十几，只变个位就可以。
序数词缩写记清楚,数字后跟两字母。
(序数词构成规律)
基数词的用法
1、表示具体数目,hundred, thousand, million不用复数
表示不确定数目,用复数。即hundreds of(数百),
thousands of(数千), millions of(数百万)+ 名词复数,
可以用many/several修饰，但不能与具体数目连用。
1) Our country has a population of 1,300 million
people.
2) There are three thousand students in our school.
3) After the war, thousands of people became
homeless.
2、 “几十”的复数形式可以表示：
在某人几十岁时 ---- in + one’s +整十基 数词复数
年 代 ---- in + the +数词复数
1) He died in his forties．四十多岁
2) In the nineties, most people go to work by bike.
90年代
3、“基数词+名词” 的合成形容词作定语，
中间有连字符“－”,当中的名词用单数。
a 3 – year – old girl a seven-day holiday
4、表计量-- “基数词+度量单位+形容词”
The classroom is 7 meters long, 6 meters wide
and 3 meters high.
1. The winner is ___. He is an ___ boy .
A. eight-year-old; eight years old
B. eight years old; eight-year-old
C. eight-years old; eight-year-old
2. He came to China ____.
A. at the age of 20
B. when he is 20
C. at age of 20
年龄
3. He graduated in __ of __ century.
A. the sixtieth; twenty
B. sixty; the twentieth
C. the sixties; the twentieth
4. He got the prize __.
A. in his fifties
B. in fifties
C. in his fifty
5、表示时刻 (介词用at)
1)顺读法----先时后分, “几点几分”
9:30 nine thirty 6:21 six twenty-one
3) 15分钟：a quarter 30分钟：a half
9:15 a quarter past nine
12:30 half past twelve
表示“整点”时，在基数词后加o’clock;
9:00 o’clock
2)逆读法----先分后时
表示“几点过几分”，半小时以内，介词用past
分钟数+past +钟点数
10:10 ten past ten 8:20 twenty past eight
表示“几点差几分”，半小时以上，介词用to
60减原分钟+ to + (下一个)钟点数
9:50 ten to ten 7:40 twenty to eight
(1)序数词作定语，前面要加the；
The first truck is carryi