Possessive S and Noun Plus Noun
Core PathWay
1 Two Ways to Connect Nouns
English has a special way to show that something belongs to someone or something.
We use apostrophe s (‘s) to show possession. This means one thing belongs to another thing. For example: Maria’s car means the car belongs to Maria. The dog’s tail means the tail belongs to the dog. My brother’s house means the house belongs to my brother. This is called the possessive case. It is special because English is the only language that uses this exact punctuation for possession.
Be careful! The punctuation looks similar to it’s (it is). For example: It’s hot today means It is hot today. But its (without apostrophe) is different. Its is a possessive pronoun. For example: The cat drinks its milk means the milk belongs to the cat. No apostrophe!
English also uses noun plus noun structures. This is when we put two nouns together without apostrophe s. We use this for descriptions, not possession. For example: a bottle top (the top of a bottle), a coffee cup (a cup for coffee), a train station (a station for trains). The first noun describes what type the second noun is.
2 Rules for Possessive S
Understanding when to use apostrophe s is very important. It helps you speak and write clearly. The rules are simple but you need to know what can possess what.
People and animals can possess things. Objects usually cannot possess things. This is the most important rule to remember!
Focus
- People and animals can possess things – use apostrophe s
- Objects usually cannot possess things – use noun plus noun instead
- Time words can use apostrophe s (today’s news, yesterday’s meeting)
- For plural nouns ending in s, add only apostrophe (the students’ books)
Rules
- Use apostrophe s (‘s) with people: Sarah’s phone, the teacher’s desk, my friend’s car
- Use apostrophe s (‘s) with animals: the cat’s food, the bird’s nest, the dog’s collar
- Use apostrophe s (‘s) with time: today’s weather, last week’s report, tomorrow’s plan
- Do NOT use apostrophe s with objects – use noun plus noun: bottle top (NOT bottle’s top), car door (NOT car’s door), table leg (NOT table’s leg)
- For plural nouns ending in s, add only apostrophe: the teachers’ room, my parents’ house, the students’ books
Examples
- Correct: John’s laptop / Wrong: the laptop’s screen (use: the laptop screen)
- Correct: the company’s office / Correct: the office door (not the door’s handle – use: the door handle)
- Correct: yesterday’s meeting / Correct: the meeting room (not the room’s table – use: the room table)
Common mistake
3 When Wrong Use Creates Confusion
Using apostrophe s wrongly can confuse people. Look at this dialogue between two work colleagues.
Tom: Can you bring the report’s copy to the meeting?
Anna: Sorry? The report has a copy? I don’t understand.
Tom: No, I mean… a copy of the report.
Anna: Oh! You want a report copy. Why did you say the report’s copy?
Tom: I thought it was the same thing.
Anna: No, it’s different. A report cannot possess a copy. We say report copy because we put two nouns together.
Commentary: Tom made a mistake. He used the report’s copy but this sounds like the report owns something. Reports are objects. Objects do not possess things. The correct way is a report copy or a copy of the report. This is a noun plus noun structure.
Here is another example:
Lisa: I need the car’s key.
Mike: Which car? Whose car?
Lisa: My car. I need my car key.
Mike: Oh! Say my car key or the key to my car. When you say the car’s key, it sounds strange.
Commentary: Lisa used the car’s key but this is not natural. Cars are objects. We usually say car key (noun plus noun) or the key to the car. Using apostrophe s with objects sounds wrong to English speakers.
4 Building Noun Plus Noun Descriptions
Noun plus noun is very useful in English. You put two nouns together and the first noun describes the second noun. The order is very important! Changing the order changes the meaning completely.
Look at these examples. Notice how the meaning changes:
1. a company car = a car that belongs to a company (the company gives it to workers) / a car company = a company that makes or sells cars
2. a coffee table = a low table in a living room (you put your coffee on it) / a table coffee = this is wrong! We don’t say this.
3. a phone call = a call you make with a phone / a call centre = a place where many people make calls for work
4. a book shop = a shop that sells books / a shop assistant = a person who works in a shop
5. a train ticket = a ticket for a train journey / a ticket office = an office where you buy tickets
6. a computer screen = the screen of a computer / a screen saver = a program that protects your screen
7. a meeting room = a room for meetings / a room service = service that brings things to your hotel room
8. a water bottle = a bottle for water / a bottle opener = a tool that opens bottles
9. a bus stop = a place where buses stop / a stop sign = a sign that tells you to stop
10. a kitchen table = a table in a kitchen / a table lamp = a lamp that sits on a table
Remember: the first noun describes the type or purpose of the second noun!
5 Transformations: Building Descriptions
Now you will learn how to change phrases into noun plus noun or possessive s structures. This helps you speak more naturally.
Transformation 1:
Long form: a ticket for the train
Short form: a train ticket
(We use noun plus noun because a ticket is an object)
Transformation 2:
Long form: the car that belongs to Sarah
Short form: Sarah’s car
(We use apostrophe s because Sarah is a person)
Transformation 3:
Long form: a cup for coffee
Short form: a coffee cup
(We use noun plus noun for objects)
Transformation 4:
Long form: the toys that belong to the children
Short form: the children’s toys
(We use apostrophe s because children are people)
Transformation 5:
Long form: the top of the bottle
Short form: the bottle top
(We use noun plus noun – a bottle cannot possess its top)
Transformation 6:
Long form: the office of the manager
Short form: the manager’s office
(We use apostrophe s because the manager is a person)
Transformation 7:
Long form: a station for trains
Short form: a train station
(We use noun plus noun for places and objects)
Transformation 8:
Long form: the weather today
Short form: today’s weather
(We use apostrophe s with time words)
Transformation 9:
Long form: a bag for shopping
Short form: a shopping bag
(We use noun plus noun for objects)
Transformation 10:
Long form: the house that belongs to my parents
Short form: my parents’ house
(We use apostrophe after s because parents is plural)
6 Recap: Possessive S and Noun Plus Noun
You learned two important ways to connect nouns in English.
Apostrophe s (‘s) shows possession. Use it with people, animals, and time words. For example: Maria’s laptop, the dog’s bowl, today’s news. Remember that its (no apostrophe) is a possessive pronoun. And it’s (with apostrophe) means it is.
Noun plus noun is for descriptions, not possession. Use it with objects and places. The first noun describes the second noun. For example: coffee cup, train station, bottle top. Never say the bottle’s top because objects cannot possess things!
The order matters! A company car (a car from a company) is very different from a car company (a company that makes cars). In English the first noun describes the nature of the second noun, i.e. meaning moves from left to right (in >>>> this >>>> direction, e.g. a coffee (noun 1) bar (noun 2). So ‘coffee’ describes what type of ‘bar. A coffee bar is very different from a whisky bar!)
Practice transforming long phrases into short forms. Ask yourself: is this possession (use ‘s) or description (use noun plus noun)? Is it a person/animal (can possess) or an object (cannot possess)? This will help you choose correctly every time.
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