1.分?jǐn)?shù)詞的一般表示法：分子用基數(shù)詞表示，分母用序數(shù)詞表示，如果分子大于1，分母用序數(shù)詞的復(fù)數(shù)形式。如：one-fourth，seven-ninths，two and three-fifths，thirty and seven-eighths。

You spend one-second of the monthly expense on body-building .

你將月開銷的二分之一用于健身運(yùn)動(dòng)。

We covered one-half (of) the distance on foot.

我們步行了一半路程。

I think we’ve covered three quarters of the distance now.

我想我們現(xiàn)在已經(jīng)走了全程的四分之三。

Each piece is called one-fourth (or one-quarter).

每一塊稱為四分之一。

If I ate two pieces, I ate two-fourths, namely one-second.

如果我吃了兩塊，我就吃了四分之二，亦即二分之一。

2.分?jǐn)?shù)詞的特殊表示法。如：a(one) half，a quarter，three quarters，two and a quarter，one and a half，twenty-two over nine。

My bag is at least 21/2 times the weight of yours.

我的包至少是你們的兩倍半重。

I give you one half, and keep the other half for myself.

我給你們一半，自己留了另一半。

A quarter of the students are girls.

學(xué)生中的四分之一是女生。

She used one-third of her income on clothing.

她把自己三分之一的收入用于服裝。

Some $30 million, about one-sixth of the total budget, was spent on medical care last year.

去年約占總預(yù)算六分之一的三千萬美元用于醫(yī)療保健。

This laptop computer is only one-tenth the weight of a normal desk-top computer.

這臺(tái)膝上型電腦僅是一臺(tái)普通桌上型電腦的十分之一重。