2.序数词
序数词的缩写形式如first---1st second---2nd thirty-first---31st等。
3.数词的用法
1)倍数表示法
a. 主语+谓语+倍数(或分数)+ as + adj. + as。例如
I have three times as many as you. 我有你三倍那么多。
b. 主语+谓语+倍数(分数)+ the size (amount,length…) of…。例如:
The earth is 49 times the size of the moon. 地球是月球的49倍。
c. 主语+谓语+倍数(分数)+ 形容词(副词)比较级+ than…。例如:
The grain output is 8 percent higher this year than that of last year. 今年比去年粮食产量增加8%。
d. 还可以用by+倍数,表示增加多少倍。例如:
The production of grain has been increased by four times this year. 今年粮食产量增加了4倍。
2)分数表示法的构成:基数词代表分子,序数词代表分母。分子大于1时,分子的序数词用单数,分母序数词用复数。例如:
1/3
one-third; 3/37
three and three-sevenths.
三.巩固练习
1.______ martyrs have heroically laid down their lives for the people.
a. Thousand upon thousand of
b. Thousand and thousands of
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