Word · Frequency #21904
fourfold
四倍；四重
by a factor of four
- 1.
By a factor of four.
以四倍的方式。
以四倍的方式。；四倍；四重
In use
The number of students at the school has increased fourfold in the past decade.
If you double the side length of a square, its area increases fourfold.
Our budget for the project has grown fourfold after the company expanded.
fourfold + noun
fourfold 作形容词时置于名词前，表示‘四倍的’。
The company reported a fourfold increase in profits.
该公司报告利润增长了四倍。
verb + fourfold
fourfold 作副词时修饰动词，表示‘以四倍的程度’。
The population increased fourfold over the century.
一个世纪内人口增加了四倍。
Common mistakes
Sales increased fourfold times this year.Sales increased fourfold this year.
fourfold 本身就表示“四倍/成四倍”，相当于 by a factor of four；再加 times 为多余。中文说“增长了四倍”，但英语里 fourfold 已包含“倍”的含义，不能写成 fourfold times。
The number of students grew fourfoldly over five years.The number of students grew fourfold over five years.
fourfold 本身就可作副词，直接修饰动词 grow，表示“成四倍地”；不能按照一般副词规则再加 -ly。fourfoldly 是不存在的形式。
Connections
Collocations
- a fourfold increase
- 四倍的增长
- The company reported a fourfold increase in profits.该公司报告的利润增长了四倍。
- increase fourfold
- 增加四倍
- The population increased fourfold in the past century.在过去一个世纪里，人口增加了四倍。
- a fourfold jump
- 四倍的激增
- There has been a fourfold jump in online orders.网上订单出现了四倍的激增。
- fourfold higher
- 高出四倍
- The cost is fourfold higher in the city center.市中心的费用高出四倍。
Pop culture & quotes
- And he shall restore the lamb fourfold, because he did this thing, and because he had no pity.
- 他必四倍赔偿那只羊羔，因为他做了这事，又因他没有怜悯之心。
Learner notes
Memory Tip
把纸对折(fold)四次，层数变成四倍：four(four)+fold(折叠)=四倍、四重。
Context & Register
语域：formal 常见场景：学术写作、正式报告、新闻语体 fourfold 表示“四倍/四重”，比较常见于正式书面语，如学术写作、正式报告或新闻语体；日常口语中则通常更常说 four times。
Grammar Note
多与数量、程度等变化搭配；作形容词时可用作定语或表语，作副词时常置于动词后。
Pronunciation & Spelling
这些词都以 -old 结尾，发音均为 /əʊld/，与 fourfold 中的 -fold 押韵。注意不要将 could、should、would 等以 -ould 结尾的词误读为 /əʊld/，它们的发音是 /ʊd/。
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.