不少同学在学习英语的过程中总以为名词单复数形式的唯一区别只在于数量上的差别，单数即“一个”，复数即“多个”，其实不然。
很多单词的单复数形式在含义上相差甚远，甚至对于某些不可数名词来说，在某些情境下，也有其“复数形式”，而其含义也发生了一定的变化。
下面我们来一起看看吧~
01
air 空气
Let’s go out for some fresh air.
咱们出去呼吸点新鲜空气。
airs 摆架子；装腔作势
I hate the way she puts on airs.
我不喜欢她那装腔作势的样子。
02
arm 臂；手臂；上肢
They walked along the beach arm in arm.
他们臂挽臂走在沙滩上。
arms 兵器；武器
Police officers in the UK do not usually carry arms.
英国警察通常不携带武器。
03
colour 颜色
The garden was a mass of colour.
花园里五彩缤纷。
colours（代表团队、国家、船等的）旗帜；徽章
Most buildings had a flagpole with the national colours flying.
大多数的建筑物都有悬挂着国旗的旗杆。
04
custom 风俗；习俗
It’s a local custom.
这是当地的风俗习惯。
customs（检查入境人员行李的）海关
She was stopped at customs and questioned.
她在海关被叫住接受问话。
05
effect 效应；影响；结果
Her criticisms had the effect of discouraging him completely.
她批评的结果是使他完全丧失了信心。
effects（个人）财产；所有物；财物
The insurance policy covers all baggage and personal effects.
这份保险单为全部行李和个人财产提供保险。
06
ground 地；地面
He lost his balance and fell to the ground.
他失去平衡摔倒在地上。
grounds 充分的理由；根据
You have no grounds for complaint.
你没有理由抱怨。
07
honour 荣幸；光荣
It was a great honour to be invited here today.
今天承蒙邀请至此，深感荣幸。
honours 大学荣誉学位课程；（美国学校的）优等班
I took an honours class in English.
我选了一个英语优等班课程。
08
look 看；瞧
A look passed between them.
他们互相看了一眼。
looks（尤指吸引人的）相貌; 容貌
She has her father’s good looks.
她有父亲俊秀的容貌。
09
manner 举止；行为方式
His manner was polite but cool.
他举止有礼但很冷漠。
manners 礼貌；礼仪
It is bad manners to talk with your mouth full.
嘴里塞满了东西跟别人说话是不礼貌的。
10
mass 许多的；大量的
Masses of books covered every surface in the room.
大量的书籍摊满了整个房间。
the masses 群众；平民百姓
a TV programme that brings science to the masses
普及科学知识的电视节目
11
odd 奇怪的；怪异的；反常的
It’s most odd that she hasn’t written.
真怪了，她一直没写信。
odds（事物发生的）可能性；概率；几率；机会
The odds are very much in our favour.
我方胜算的几率极大。
12
paper 纸；纸张
She wrote her name and address on a slip of paper.
她把姓名和地址写在一张纸条上。
papers 文件；文献
His desk was covered with books and papers.
他的办公桌上全是书籍和文件。
13
quarter 四分之一
The theatre was about three quarters full.
剧场大约坐了四分之三的人。
quarters（供士兵、服务人员居住的）营房；宿舍；住房
We were moved to more comfortable living quarters.
我们搬进了较舒适的住处。
14
art 艺术；美术（尤指绘画、雕刻、雕塑）
Her performance displayed great art.
她的表演展现了精湛的技艺。
arts 人文科学；文科（如语言、历史、文学）
an arts degree
文科学位
15
ton 吨
What have you got in this bag? It weighs a ton!
你这口袋里装的是什么？重死了！
tons 大量；许多
I’ve still got tons to do.
我还有许多事要做。
16
term 学期（尤用于英国，学校一年分三个学期）
Many students now have paid employment during term.
现在许多学生在上学期间就从事有薪工作。
terms（协议、合同等的）条件；条款
These are the terms and conditions of your employment.
这些就是聘用你的条件。
17
thing 东西；物
She’s very fond of sweet things.
她非常喜欢吃甜食。
things 形势；局面；情况；事态
Things haven’t gone entirely to plan.
事态没有完全按照计划发展。
