栏目分类
发布日期:2026-04-28 09:29 点击次数:119

一、分数表示法
(一)核心规则
1. 基本结构:分子用基数词,分母用序数词;分子>1时,分母用复数形式
- 1/2 → a(one) half
- 1/3 → a(one) third
- 2/4 → two fourths
2. 复杂分数:可用 over 简明表达
- 22/9 → twenty-two over nine
3. 带分数:整数与分数之间用 and 连接
- 6 2/5 → six and two fifths
(二)例句
- Only one fifth of air consists of oxygen.
- You should finish the work within one and a fourth hours.

二、小数表示法
1. 读法:小数点前按基数词读,小数点后需逐个读出数字
- 1.42 → one point four two
- 31.04 → thirty-one point zero four
2. 百分数形式: % 读作 percent
- 2.5% → two point five percent

三、百分数表示法
(一)核心规则
1. 结构:由基数词(或小数)+ 百分号(%)组成, % 读作 percent
- 15% → fifteen percent
- 0.6% → zero point six percent
2. 增减语境:表示“增、降”百分数时,常与 by 连用
(二)例句
- 30% of the students in our class are girls.
- The price of cotton was reduced by 20 percent.

四、倍数表示法
(一)核心句型(用 times 表达)
④ …times + compared with + 被比较对象 与…相比,……多少倍 The number of the students in our school has increased four times compared with 1980.
(二)用 double 表达
- 含义:表示“两倍的”或“是……的两倍”
- 例句:The production is now double what it was ten years ago. / The output has been doubled in the past ten years.

五、约数表示法
1.大约 about, or so, around, more or less, roughly, some + 数词 There are about twenty thousand books in the library.
2.大于,多于 more than, over, or more + 数词 The people attending the meeting are over 1,000.
3.小于,少于 less than, under, below, up to, almost, nearly + 数词 He will come under an hour.

六、数词学习口诀(原创)
英语数词分两类,要想掌握不简单;
基数用来表数量,序数表明次第先;
主表宾定同位状,六种成分数词担;
百千万来表单位,数字之后用形单;
泛指数以百千万,复数形式须出现;
记住特例与规律,基数序数巧变换;
用在编号等场合,序数置于词语前;
序数前用定冠词,基数置于词后面;
分数小数百分数,表示方法要明辨;
倍数约数为常考,熟记词句是关键。

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