(1)a. 当前面有数词及many, several 修饰时，这几个词用单数，表 具体概念1.基数词 two hundred old people 两百老人b. 当前面没有数词而后面有of 时则①. hundred, thousand 一定要用复数形式，表笼统概念。
(2) 基数词用法 million 的用法②.(1).基数词变序数词 2.序数词 (2).序数词缩写：阿拉伯数字加上序数词的最后两个字母first —1st second —2nd forth —4th(1). 3 = one third 4 = three-fourths = three quarters 12= one and one-second = one and a half(2). 小数. 按基数读。
“.”读point 。
3.145=three point one four five3.基数词和 (3). 百分数。
基数词加percent 表示。
5%=five percent序数词的 (4). 年月日表达。
May 1(st), 1949 = May the first, 1949共用法 (5). 时刻表达。
a. 倍数+as …..as. 例:Asia is four times as large as Europe.(6). 倍数表达。
b. 倍数+形容词比较级+than .例: Asia is fourth larger thanEuropec. 倍数+the size of. 例: Asia is four times the size of Europe(7). 加减乘除。
“+”= and 或plus “-”= minus “*”= times “/”= divideby1. ( ) —Have you seen _____ workers pass by?—Yes, I’ve seen _____them.A. woman, hundreds ofB. women, hundreds ofC. woman, two hundred ofD. women, hundreds2. ( ) —What’s the date today?—It’s _____.A. SundayB. August the ninthC. the first of MayD. October fifth3. ( ) Hainan is ______ island.A. China’s second largestB. the China’s second largestC. the second China’s largestD. China’s the second largest4. ( ) In her _____ she began to take up writing.A. fortiesB. fourtiesC. fortiethD. fourtieth5. ( ) _____ of the rivers here have been polluted.A. Two-thirdB. Two-thirdsC. Two-threeD. Second-third6. ( ) —What time is it now?—It’s _____A. a quarter past halfB. four eighteenC. five past forty-twoD. forty-two to five7. ( ) _______students are planting trees.A. Several hundredsB. Several hundredC. Five hundredsD. Five hundred of8. ( ) The weight of the moon is only about ______of that of the earth.A. one eightyB. one of eightyC. one the eightiethD. one eightieth9. ( ) —Peter, how old is your father this year?—_______. And we just had a party for his ______birthday last weekend.A. Fortieth, fortyB. Forty, fortyC. Forty, fortiethD. Fortieth, fortieth10. ( ) Many ______trees should be planted on the mountains.A. thousandB. thousand ofC. thousandsD. thousands of11. ( ) ______, Coca-Cola began to enter China’s market.A. in 1970’sB. In 1970sC. In the 1970s’D. In the 1970’s12. ( ) About ______ of the workers in the factory were born in the ________.A. two-thirds, 1970B. two-thirds, 1970sC. two-third, 1970D. two-third, 1970s13 ( ) Do you want to buy _______ pork?A. half kiloB. half a kiloC. a kilo halfD. a half kilo14. ( ) The story happened_______.A. in July9, 2003B. on July 9th 2003C. in 2003 July 9D. on 2003, 9th July15 ( ) September ______ is Teachers’ DayA. the tenB. the tenthC. the ten’sD. Ten16 ( ) Ten and five is ________.A. fiveB. fiftyC. fifteenD. two17. ( ) John began to make a living buy himself ________>A. in his thirtyB. in his thirtiesC. in the thirtyD. in the thirties18. ( ) —Do you know when Christmas Day is?—It’s on ___________.A.December 24thB. January 1stC. December 25thD. October 1st19. ( ) Dick, it is the _______ time in ______ days that you have made the samemistake.A. two, threeB. second, threeC. two, thirdD. second, third20. ( ) _______the students in the primary school is about three thousand, and_______ of them are girls.A. A number of, two thirdB. The number of, two thirdsC. A number of, two thirdsD. The number of, two third。
