5. 有关倍数表示法

两倍用twice, 三倍以上用数词+times, 要注意倍数在句子的位置。

例：The door is three times the size of this.

6. 十位数字(个位为零)的基数词以复数形式出现时，表示年代、年龄

例：She is a good-looking woman in her forties. (forties 指40—49岁之间)

. 数词实练习题解析：

1. The English for 10,440 is　　　　 .

A. ten thousand , four hundreds and forty

B. ten thousand, four hundred and forty

C. ten thousands, four hundred and forty

D. ten thousand and four hundred, forty

本题在于掌握千以上数字的读法，在千、百前面有数字，不加复数;百位、十位中间加and ，每三位为一组，再加相应的单位即可，故选B

2. of the workers in the factory is about two hundred, 　　　　of them are women workers.

A. The number, first-third　 B. The number, one-third　C. A number, half　 D. A number, three quarters

分数表达法前文阐述已经很多，应表示为one-third. 要区分the number of 与a number of , the number of 指“……的数量” ，谓语动词用单数;

a number of 意为“许多”，谓语动词为复数。故选B

3. --- Can you write the number eighty-five thousand , six hundred and twenty-six?

--- Yes, it is　　　　 .

A. 85662 　B. 85626　 C. 85006 　D. 85000

千以上的数字，从后往前三个数为一个单位，即从85之后顺次写出三个数即可，即626，连在一起即为85626。故选B.

4. About 　　　　of the books in our school library are written in Chinese.

A. fouth-fifths　 B. four – fifth 　C. four –fifths　 D.fourths-fifth

本题考查分数的表达法，分子用基数词，分母用序数词，当分子大于1，

分母用复数，因此它的表达法为four-fifths,故选C。

5. The road is over　　　　 meters long.

A. six hundred and fifty-two　B. six hundreds and fifty two

C. six hundred, fifty –two　D. six hundred, fifty and two

百、千、百万等词与数字连用不用复数，因此不加s。其次表示百位数时要在百位和十位之间(无十位，则在百位和个位之间)加and ，再次在个位与十位之间要有连字符“-”，故本题选A

6. January　　　　 is New Year’s Day.

A. one 　B. two 　C. the first　D. the second

某月的几号要用序数词表示，读时序数词前要加the 。故选C

7. Take the　　　　 turning on your night.

A. nine 　B. ninth 　C. nineteen 　D.nineth

根据题意判断本题考第几个转弯处需用序数词，拼写正确的只有B

具体专项练习 (选择正确答案)

1. There are　　　 days in a week.

A. the seven 　B. seventh　 C. the seventh 　D. seven

2. I think that the        century (世纪) will bring us more hopes.