■four square 直率的；坦白的
The girl is four square. 这女孩很直率。
■on all fours 爬着
The baby was crawling about on all fours. 婴儿那时正在满处爬。
■four-lettered words 下流话
These books are full of four-lettered words. 这些书里脏话连篇。
■in fours 每组四个
Group together in fours! 每四人一组!
Students are standing in a line，in fours. 学生们每组四人排成队。
单词：four的近义词、反义词、形近词辨析
four/forty/fourteen/fourth/forth/fortnight
记忆：
1. four [ fC:] 四 He is just a baby on all fours.他只是一个匍匐爬行的婴儿。
2. forty [ 5fC:ti ] 四十
3. fourteen [ 5fC:5ti:n ] 十四
4. fourth [ fC:W] 第四
5. forth [ fC:W ] for, 即，fore, 前；adv. 往前, 向外 He brought forth a wonderful suggestion at the meeting.他在会上提出了一条绝妙的建议。
6. fortnight [ 5fC:tnait] fort联想fourteen, 十四；fortnight, 十四个晚上，n. 两星期 It seems that I will have to stay here for a fortnight.好象我得在这儿呆上两个星期。
另类阅读：
After a fortnight, it was May the fourth, Youth Day. Fourteen students decided to help forty families in poverty from the day forth.
与单词：four 相关的例句或者名人名言
The orchestra is made up of four sections.
管弦乐队由四个部分组成。
These four books are the classics of Chinese literature.
这四本书是中国文学经典。
A violin has four strings.
小提琴有四根弦。
Our business success is based on four fundamental principles.
我们生意的成功是基于四项基本的原则。
Each student studies four core subjects.
每个学生学习四门基础课。
※A horse stumbles that has four legs. 人有失足，马有失蹄。
※My father had always said that there are four things a child needs plenty of love, nourishing food, fegular sleep , and lots of soap and water---and after those, what he needs most is some intelligent neglect.——Ivy Baker Priest, American officer of government 我父亲总是说，一个孩子需要四样东西--充分的爱、富于营养的食物、有规律的睡眠、大量的肥皂和水--这些完了呢，他最需要的是一些明智的放任。美国政府官员 普里斯特.I.B.
