數詞的用法

1）倍數表示法 a. 主語+謂語+倍數（或分數）+ as + adj. + as I have three times as many as you.　我有你三倍那麽多。

b. 主語+謂語+倍數（分數）+ the size (amount，length…) of… The earth is 49 times the size of the moon.　地球是月球的49倍。

c. 主語+謂語+倍數（分數）+ 形容詞（副詞）比較級+ than… The grain output is 8 percent higher this year than that of last year. 今年比去年糧食産量增加8%。

d. 還可以用by+倍數，表示增加多少倍 The production of grain has been increased by four times this year. 今年糧食産量增加了4倍。

2）分數表示法 搆成：基數詞代表分子，序數詞代表分母。分子大於1時，分子的序數詞用單數，分母序數詞用複數： 1/3 one-third ； 3/37 three and three-sevenths.