Grammar Rule in 30 Seconds
To talk about more than one thing in English, simply add the letter -s to the end of the word.
- One thing: no -s (One cat)
- Two or more things: add -s (Two cats)
- Zero things: also add -s (Zero cats)
Overview
one cat（一只猫）是如何变成 two cats（两只猫）的？结尾的那个小 -s 是英语中最强大的工具之一。这是我们表示某物不止一个的基本方式。你随处可见，从你的购物清单（apples, bananas）到你最喜欢的 Netflix 节目（friends, episodes）。大多数时候，让一个名词变复数就像加上那个字母一样简单。可以把它看作是复数的默认设置。当然，英语喜欢有它自己的小怪癖和例外，我们稍后会讲到。但是掌握这个简单的 -s 规则是你听起来自然的第一大步。这是一个小小的改变，却能让人们对你的理解产生巨大的不同。把它弄对就像学会一首热门歌曲的副歌；一旦你学会了，你就能跟着大部分音乐一起唱了。How This Grammar Works
dog 时，你是在说一只孤单的小狗。但当你说 dogs 时，你是在说两只、三只或满公园的狗！-s 是一个后缀，这只是一个花哨的词，指为了改变词义而加在词尾的字母或字母组合。在这种情况下，它把意思从单数（一个）变为复数（多于一个）。这是语言中的一种效率技巧。我们不是用一个完全不同的词来表示复数，而只是修改现有的词。它适用于你可以数的东西（one chair, five chairs）、人（one teacher, ten teachers），甚至抽象概念（one problem, many problems）。它太常见了，以至于你的大脑会很快学会自动这样做。
Formation Pattern
book。
-s。
book + -s = books。
car → cars
phone → phones
friend → friends
ticket → tickets
photo → photos
When To Use It
-s 复数。可数名词是任何你可以在前面加上数字的东西。- 列清单： 当你给朋友发短信说聚会要带什么时：“我们需要
snacks、drinks和games。” - 谈论爱好： 在你的交友资料上：“我喜欢读
books、看movies和尝试新的restaurants。” - 网上购物： 你不是在找一只
shoe，你是在找一双shoes。你把三件shirts加入购物车。 - 一般性陈述： 当你对某事做一般性陈述时，你通常使用复数。例如，“
Cats是独立的动物。”你不是在谈论一只特定的猫，而是在谈论猫这个物种。 - 数任何东西： 只要你在名词前有一个数字（除了 1），就使用它：
two dogs、100 reasons、a million dollars。
-s。
Common Mistakes
-s： 这是最基本的。“I have two cat.” (✗)
cats.” (✓)。当你想得快或从没有类似复数规则的语言翻译时，这很容易出错。
- 1使用撇号 (
's)： 这是一个大错误！撇号用于所有格（属于某人）或缩写，不用于复数。“I love Saturday's.” (✗) 是错的，除非你爱属于周六的某样东西。正确的说法是 “I loveSaturdays.” (✓)。 - 2过度使用
-s规则：有些词是不规则的，不加-s。例如，one child变成two children，而不是two childs(✗)。one person在大多数情况下变成two people，而不是two persons(✗)。 - 3以嘶嘶声结尾的名词： 以
-s、-sh、-ch、-x或-z结尾的词需要加-es以使其更容易发音。one box变成two boxes，而不是two boxs(✗)。试图说 “boxs” 是一个真正的绕口令！
Contrast With Similar Patterns
-s 是主角，但它对于不同类型的词有一些配角。把它们并排看会很有帮助。-svs.-es：-s用于大多数名词。-es用于以嘶嘶声（-s、-sh、-ch、-x、-z）结尾的名词，以使其可以发音。想想bus→buses或witch→witches。e增加了一个额外的音节。所以你不仅仅是加-s，你还加了一个小元音来帮忙。-svs. 不规则复数： 英语中一些最古老、最常见的词有它们自己特殊的复数形式。它们根本不遵循-s规则。这些是反叛者。例如：man→men、woman→women、foot→feet、mouse→mice。你只需要记住这些。它们就像复数世界里的贵宾；它们不遵守正常规则。-svs. 不变复数： 有些名词很懒，根本不变。one sheep就是two sheep。one fish可以是two fish（特别是当它们是同一物种时）。单词保持不变。上下文会告诉你它是单数还是复--svs. 不变复数： 有些名词很懒，根本不变。one sheep就是two sheep。one fish可以是two fish（特别是当它们是同一物种时）。单词保持不变。上下文会告诉你它是单数还是复数。
-s 是你的首选，但要时刻留意那些需要稍微不同结尾或决定完全打破规则的词。Quick FAQ
-s 吗？-s, -sh, -ch, -x, -z 结尾的词，你会加 -es（例如 boxes）。还有一些词是不规则的（children, feet）。photo's 来表示 photo 的复数？'s) 表示所有权，而不是复数。The photo's color 意思是照片的颜色。Photos 只是意味着多于一张照片。-y 结尾的词怎么办？-y 前面是元音（如 toy），你只需加 -s → toys。如果前面是辅音（如 city），你把 y 变成 i 再加 -es → cities。water 或 happiness，所以你不能用同样的方式说 waters 或 happinesses。这些被称为不可数名词，它们有自己的规则。Regular Plural Formation
| Singular | Addition | Plural | Example |
|---|---|---|---|
|
Cat
|
+ s
|
Cats
|
I have two cats.
|
|
Dog
|
+ s
|
Dogs
|
She has three dogs.
|
|
Book
|
+ s
|
Books
|
The books are on the table.
|
|
Car
|
+ s
|
Cars
|
There are many cars.
|
|
Friend
|
+ s
|
Friends
|
My friends are nice.
|
|
Apple
|
+ s
|
Apples
|
I want five apples.
|
|
Phone
|
+ s
|
Phones
|
We have new phones.
|
|
Desk
|
+ s
|
Desks
|
The desks are clean.
|
Meanings
The standard way to indicate that there is more than one of a countable object, person, or place.
Quantity
Used when specifying a number greater than one.
“I want four apples.”
“She has two brothers.”
Generalization
Used to talk about a group of things in general without a specific number.
“I like cats.”
“Books are good.”
Zero Quantity
Used with the word 'no' or 'zero' to show something is missing.
“I have no pens.”
“There are zero cookies left.”
Reference Table
| 单数名词 | 复数名词 | 例句 |
|---|---|---|
|
cat
|
cats
|
I have two `cats`.
|
|
book
|
books
|
She loves reading `books`.
|
|
car
|
cars
|
There are many `cars` on the road.
|
|
apple
|
apples
|
Can I have three `apples`?
|
|
friend
|
friends
|
My `friends` are coming over.
|
|
house
|
houses
|
Those `houses` are very old.
|
|
pen
|
pens
|
I bought new `pens` for school.
|
|
student
|
students
|
Many `students` study here.
|
正式程度
I am in possession of two cats. (Personal life)
I have two cats. (Personal life)
I've got two cats. (Personal life)
I got two kitties. (Personal life)
英语名词复数构成
单数
- cat 一只猫
- book 一本书
复数 (+s)
- cats 许多猫
- books 许多书
单数 vs. 复数 (-s)
我应该加“-s”变复数吗？
这是一个名词吗（人、地点、事物、想法）？
你指的是“不止一个”吗？
它是一个“规则”名词吗（最常见的词）？
日常生活中的“-s”复数
你看到的东西
- • trees
- • cars
- • buildings
- • flowers
你认识的人
- • friends
- • teachers
- • students
- • neighbors
日常用品
- • phones
- • books
- • pens
- • keys
食物和饮料
- • apples
- • burgers
- • coffees
- • drinks
按水平分级的例句
I have two cats.
I have two (more than one) cat.
She sees three cars.
She sees three (more than one) car.
He wants four apples.
He wants four (more than one) apple.
They have five books.
They have five (more than one) book.
The dogs are in the park.
The group of dogs is in the park.
Do you like bananas?
Do you like the fruit called banana in general?
There are no chairs here.
The number of chairs is zero.
My friends live in London.
The people I am friends with live in London.
Most students prefer digital books.
The majority of learners like e-books.
The shops close at 6 PM.
The stores finish their business at 6.
I need to buy some new pens.
I need an unspecified number of pens.
The mountains look beautiful today.
The range of mountains is pretty.
Economic factors influence market trends.
Various financial elements affect how markets move.
The results of the tests were surprising.
The outcome of the examinations was unexpected.
Many cultures celebrate the new year differently.
A variety of societies have different traditions.
The instructions were very clear.
The steps to follow were easy to understand.
The implications of these findings are vast.
The consequences of this data are significant.
Societal norms dictate our behaviors.
The rules of society control how we act.
The architects designed several skyscrapers.
The professionals created plans for many tall buildings.
The nuances of the language are difficult.
The small details of the tongue are hard.
The intricacies of the legal systems vary by region.
The complex details of law differ geographically.
The poets of that era explored dark themes.
The writers of that time looked at somber subjects.
The fluctuations in the stock markets are volatile.
The changes in the markets are unstable.
The manifestations of the disease are diverse.
The ways the illness shows up are varied.
容易混淆
Learners think the apostrophe is needed for all words ending in S.
Learners try to add -s to words like 'water' or 'information'.
Learners add -s to words that change their whole spelling.
常见错误
I have two dog.
I have two dogs.
A cats.
A cat.
The cats is big.
The cats are big.
Two bigs cats.
Two big cats.
I like cat.
I like cats.
The cat's are here.
The cats are here.
The informations are useful.
The information is useful.
句型
I have [number] ___.
I like ___.
There are [number] ___ on the table.
How many ___ do you see?
Real World Usage
I need five apples and two bags.
Are your brothers coming tonight?
I have many skills in marketing.
Can I have two burgers and three sodas?
Check out my new photos!
How many suitcases do you have?
听听“-s”的读音
动词不能变复数！
能数清的就加“-s”
“-s”复数在世界通用
Smart Tips
Always use the plural form without 'the'.
Use the plural noun to sound more natural.
Immediately prepare your mouth to make the 's' sound at the end of the next word.
Check if you are counting or showing ownership. No apostrophe for counting!
发音
The /s/ sound
If the word ends in a 'quiet' sound (like p, t, k, f), the -s sounds like a snake hiss.
The /z/ sound
If the word ends in a 'vibrating' sound (like b, d, g, l, m, n, r, v, or any vowel), the -s sounds like a buzzing bee.
List Intonation
Apples ↗, oranges ↗, and bananas ↘.
When listing plurals, the voice goes up for each item and down at the end.
记住它
记忆技巧
The 'S' stands for 'Super-sized' or 'Several'—add it when you have more than one!
视觉联想
Imagine a giant letter 'S' acting as a bridge between two identical objects. The bridge only appears when there are at least two things to connect.
Rhyme
One is fun, but two needs an 'S' to be the best!
Story
A lonely cat named Charlie found a friend. To show they were a team, they both wore a hat with a big 'S' on it. Now they are 'Cats'.
Word Web
挑战
Look around your room. Find 5 things you have more than one of and say their names out loud with an 'S' (e.g., 'Two pillows', 'Three pens').
文化笔记
English speakers are very specific about number. Failing to use the plural can make you sound like a child or very uneducated.
In the UK, some collective nouns (groups of people) can be treated as plural even without an -s, like 'The team are playing well.'
Americans almost always use the singular for collective groups ('The team is playing well'), but always use the -s for individual items.
The -s plural comes from the Old English 'as' ending, which was used for a specific group of masculine nouns.
对话开场白
Do you have any pets?
What fruits do you like?
How many brothers and sisters do you have?
What things are on your desk right now?
日记主题
常见错误
Test Yourself
I have two new ___ for school.
Find and fix the mistake:
She has three cat.
选择正确的句子：
翻译成英语：'I have two friends.'
Answer starts with: ["I...
Score: /4
练习题
8 exercisesI have three (dog) ___.
Which sentence is correct?
Find and fix the mistake:
He has five blue pens.
Match: 1. Book, 2. Apple, 3. Friend
likes / she / cats
We add -s to adjectives like 'big' or 'small'.
A: How many books do you have? B: I have ten ___.
Pick the plural word.
Score: /8
Practice Bank
12 exercisesCan I have two ___ of coffee?
My mom bought new ___ for the kitchen.
He has many photo of his trips.
I need three bottle of water.
选择正确的句子：
选择正确的句子：
Translate into English: 'Ella tiene muchas ideas.'
Translate into English: 'Tengo cinco amigos.'
将这些词排列成一个句子：
将这些词排列成一个句子：
将单数名词与其正确的复数形式匹配：
将单数名词与其正确的复数形式匹配：
Score: /12
常见问题 (8)
For about 90% of words, yes! Some words ending in 'y', 'ch', or 'sh' have slightly different rules, but -s is the most common.
That is an irregular plural. 'Person' becomes 'people'. You will learn those later!
In English, zero is treated as plural. We say `zero apples`.
They are likely making a mistake or speaking a specific dialect. In standard English, you must say `two cats`.
Yes! After voiced sounds like 'g' in 'dogs', it sounds like a /z/. After quiet sounds like 't' in 'cats', it sounds like an /s/.
No, you must say `many cats`. 'Many' always requires a plural noun.
No. 'Water' is uncountable. You can't have 'one water, two waters' unless you mean 'bottles of water'.
`Cats` means more than one cat. `Cat's` means something belongs to the cat.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
-s / -es
English adjectives stay singular.
-s
The English plural -s is always audible.
Multiple endings (-e, -er, -en, -s)
English almost always uses -s; German rarely uses just -s.
None (usually)
English requires a physical change to the word.
Dual and Broken Plurals
English uses -s for everything from 2 to infinity.
Measure words
English changes the noun, not just the counter.
Learning Path
Prerequisites
Connected Grammar
Plurals with -es
Builds OnThis is the next step for words ending in sounds like 'sh' or 'x'.
Irregular Plurals
ContrastThese are the words that don't follow the -s rule.
Subject-Verb Agreement
Advanced FormPlural nouns change how the verb 'to be' works.
Countable vs Uncountable Nouns
PrerequisiteYou can only add -s to countable nouns.
