Possessive Nouns
A2 · ElementaryNounsOne small apostrophe tells your reader exactly who something belongs to — and exactly where you put it changes what you're saying.
What you'll learn
- How to add 's to a singular noun to show ownership or a relationship
- Why plural nouns ending in -s only need an apostrophe, with no extra s
- How irregular plurals like children and men take 's, just like singular nouns
- The difference between its (belonging to it) and it's (it is / it has)
The core idea
A possessive noun shows that something belongs to someone, or that two people or things are connected — a family relationship, an owner and an object, a company and its policy. In writing, you show this with an apostrophe ( ' ).
The exact spelling rule depends on whether the noun is singular, a regular plural, or an irregular plural — but the idea behind all three is the same: mark the owner, then name the thing they own.
Singular noun + 's
For a singular noun — one person or one thing — add 's to the end, even if the noun already ends in s: my sister's husband, the manager's office, my boss's email.
The 's goes on the OWNER, not on the thing that's owned: it's Maria's bag (Maria owns it), not Marias' bag.
Regular plural (-s) + apostrophe only
Most English plurals already end in -s: workers, teachers, neighbors. When a plural like this owns something, you don't add another s — just add an apostrophe after the one that's already there: the workers' schedule, the neighbors' fence, the teachers' lounge.
Say the word out loud first: "workers'" and "worker's" sound identical. The apostrophe is doing silent work here — it only shows up in writing, but it still matters.
Irregular plural + 's
Some plurals don't end in -s at all — children, men, women, people. Because they don't already end in s, they follow the same rule as a singular noun: add 's. The children's room. The men's department. The women's coats.
It's easy to see "children" or "men" and assume it just needs an apostrophe, the way a regular plural does — but since there's no -s to work with, 's is correct.
its vs. it's
its (no apostrophe) is a possessive determiner — it means "belonging to it," the same job as his or her. The dog wagged its tail.
it's (with an apostrophe) is a contraction — short for "it is" or "it has." It's raining. It's been a long day.
Quick check: if you can replace the word with "it is" or "it has" and the sentence still makes sense, use it's. If not, use its.
Possessive vs. plural — don't mix them up
This is one of the most common mixups with nouns: adding or dropping an apostrophe changes what a word means, not just how it looks. the dog's (belongs to one dog, e.g. the dog's leash) vs. the dogs (simply more than one dog) vs. the dogs' (belongs to more than one dog, e.g. the dogs' leashes).
Before you add an apostrophe, ask yourself: am I just talking about more than one thing (plural — no apostrophe), or am I showing that something belongs to someone (possessive — apostrophe needed)? If it's just a plural, leave the apostrophe out.
Real English
Watch out
its (no apostrophe) means "belonging to it." it's (with an apostrophe) means "it is" or "it has" — not what's meant here.
This isn't showing possession, just a plain plural — two sisters. Save the apostrophe for when you're showing ownership.
"Teachers" already ends in -s, so the possessive only adds an apostrophe — never a second s.
"Children" doesn't already end in -s, so it takes 's, the same as a singular noun would.
Real life — At the front desk
"Excuse me, is this your brother's umbrella? Someone left it here."
"No, that's not his — but it might be my roommate's. She was here earlier."
"Okay, I'll leave it at the children's lost-and-found box near the entrance."
"Thanks — I'll ask my roommate's sister too, just in case."
Practice
Exercise 1 · Choose the correct sentence
Which sentence shows that the backpack belongs to Noah?
Exercise 2 · Choose the correct phrase
A family has one dog. Which phrase correctly names its leash?
Exercise 3 · Choose the correct form
Fifteen workers share one break room. Which is correct?
Exercise 4 · Choose the correct form
Which is correct?
Exercise 5 · Choose the correct form
Which is correct?
Exercise 6 · Complete the sentence
Complete the sentence: The bird built ___ nest in the old oak tree.
Exercise 7 · Complete the sentence
Complete the sentence: ___ already past six o'clock.
Exercise 8 · Sort into groups
0 / 6 sorted
Exercise 9 · Build the sentence
Exercise 10 · Build the sentence
Exercise 11 · Build the sentence
Exercise 12 · Write the possessive phrase
Write the possessive noun phrase: the phone that belongs to Priya
Exercise 13 · Write the possessive phrase
Write the possessive noun phrase: the coats that belong to the women (more than one woman)
Exercise 14 · Fix the mistake
Fix the mistake and type the correct sentence: "My brothers car is in the shop." (one brother)
Exercise 15 · Fix the mistake
Fix the mistake and type the correct sentence: "The store changed it's opening hours."
Exercise 16 · Real-life scenario
You're writing a lost-and-found note for a backpack that belongs to two students who share it. Which is correct?
Quick challenge
Five quick questions on ownership, apostrophes, and its vs. it's.
Question 1 / 5
Score: 0/0
Which is correct?
You learned
- Add 's to a singular noun to show possession, even if it already ends in s: the manager's office, my boss's email.
- Regular plurals ending in -s add only an apostrophe: the workers' schedule, the teachers' lounge.
- Irregular plurals that don't end in -s (children, men, women) still take 's: the children's room.
- its = belonging to it (no apostrophe); it's = it is / it has (with an apostrophe).
- A plural noun alone (the dogs) just means more than one — only add an apostrophe when you're showing ownership.
Related grammar lessons
Compound Nouns
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Countable and Uncountable Nouns
Learn how to use a/an, plural forms, some, much and many correctly — plus the "piece of" pattern for talking about one unit of an uncountable noun like advice or information.
Noun Phrases
Learn how English builds a noun phrase from a determiner, modifiers and a head noun — and how to expand a simple phrase step by step into a precise, natural description.
Singular and Plural Nouns
Learn how to form plural nouns in English — the regular -s/-es rule, spelling changes like city to cities and leaf to leaves, common irregular plurals, and the apostrophe mistake to avoid.