Possessive 's in English

Overview

The possessive 's is one of the most common ways to show ownership or a relationship between people and things in English. By adding 's to a noun, you indicate that something belongs to or is associated with that noun: "John's car" means the car that belongs to John.

At the CEFR A1 level, you need to master the basic rules for forming possessives with 's and understand when to use the alternative "of" construction. This concept appears constantly in everyday English -- talking about family ("my sister's husband"), possessions ("the teacher's desk"), and relationships ("the city's best restaurant").

The possessive 's should not be confused with the contraction of "is" (he's = he is) or "has" (she's = she has), even though they look identical. Context always makes the meaning clear.

How It Works

Basic Rules

Noun Type	Rule	Example
Singular noun	Add 's	the dog**'s** bone
Plural noun ending in -s	Add just '	my parents**'** house
Irregular plural (not ending in -s)	Add 's	the children**'s** toys
Proper name ending in -s	Add 's or just '	James**'s** book / James**'** book

Possessive 's vs "Of"

English uses two main structures for possession:

Structure	Used For	Example
's	People and animals	Sarah**'s** phone
of	Things, places, and long phrases	the end of the movie
Either	Organizations, groups	the company**'s** policy / the policy of the company

General Guidelines

• Use 's for people and animals: the cat's tail, Maria's job
• Use of for things and abstract ideas: the color of the sky, the beginning of the year
• Use of for long or complex phrases: the opinion of the people who attended

Possessives Without a Following Noun

Sometimes the possessed noun is understood and can be omitted:

• Whose jacket is this? It's John's. (= John's jacket)
• I'm going to the doctor's. (= the doctor's office)
• We had dinner at my parents'. (= my parents' house)

Examples in Context

English	Note
John's car	Singular noun + 's
my parents' house	Plural noun ending in -s, add only '
the children's toys	Irregular plural + 's
the end of the movie	"of" for things
my friend's birthday is tomorrow	Singular possessive
the dog's name is Rex	Animal possessive
Where is the manager's office?	Singular possessive
It's a ten minutes' walk.	Time expression with possessive
the women's team	Irregular plural + 's
I like this city's parks.	Place possessive (either form works)

Common Mistakes

Confusing possessive 's with plural -s

• Wrong: The dog's are in the garden. (meaning multiple dogs)
• Right: The dogs are in the garden.
• Why: An apostrophe + s ('s) shows possession, not plural. "The dog's" means "belonging to the dog." For the plural, just add -s with no apostrophe.

Forgetting the apostrophe after plural nouns

• Wrong: My parents's house.
• Right: My parents' house.
• Why: For plural nouns that already end in -s, you add only an apostrophe, not another -s.

Using 's for things instead of "of"

• Wrong: The table's leg is broken.
• Right: The leg of the table is broken.
• Why: For inanimate objects, "of" is generally preferred. While some native speakers use 's for things, "of" is the safer choice at this level.

Missing the apostrophe entirely

• Wrong: Sarahs phone is ringing.
• Right: Sarah's phone is ringing.
• Why: Without the apostrophe, "Sarahs" looks like a misspelled plural. The apostrophe is essential in writing to show possession.

Usage Notes

There is some variation between British and American English regarding names ending in -s. "James's book" (with the extra -s) is more common in American English, while "James' book" (without the extra -s) is more common in British English. Both are acceptable.

In casual speech, the distinction between "the company's policy" and "the policy of the company" is not rigid. Native speakers often use 's for organizations, countries, and even some things: "the car's engine," "London's nightlife." However, for learners, the people = 's, things = of guideline is a reliable starting point.

Practice Tips

• Describe a family photo: Point to people and describe their possessions: "This is my brother's girlfriend. That's my grandmother's garden. Those are my cousins' bikes."
• Practice the three forms: Write five examples for each: singular 's (the cat's tail), plural ' (my friends' house), and "of" (the name of the street).
• Spot the difference: Write pairs of sentences where 's means "is" vs possession: "She's happy" (she is) vs "She's got a cat" vs "Sarah's cat" (belonging to Sarah). This helps you become comfortable with all three uses.

Related Concepts

• Prerequisite: Possessive Adjectives -- learn my, your, his, her, its, our, their before moving to possessive 's