What Are Double Possessives?
A double possessive is a structure that uses both an article (a, an, the) and a possessive form together. It looks like: a/an/the + noun + of + possessive pronoun. For example: 'a friend of mine' or 'the house of his'. Double possessives are very common in English and sound more natural than some other possessive forms. They are especially used when we want to emphasize the relationship between two things or people.
When Do We Use Double Possessives?
We use double possessives to talk about people or things that belong to someone. They are often used with people and relationships: 'a brother of mine', 'a colleague of theirs'. Double possessives are also common with nouns that describe things we own: 'a book of hers', 'the car of ours'. In everyday English, people prefer 'a friend of mine' more than 'my friend' when they want to sound more natural or descriptive. Double possessives help us add more information in a conversational way.
How to Form Double Possessives
The structure is simple: article + noun + of + possessive pronoun. The possessive pronouns you can use are: mine, yours, his, hers, ours, theirs. You always need the article first (a, an, or the). Note: you cannot use both possessive adjectives ('my', 'your', 'his', 'her') AND the double possessive together. You must choose one form: say either 'my friend' OR 'a friend of mine', not both.
Double Possessives vs. Simple Possessives
| Category | Single Possessive (e.g. "my friend") |
Double Possessive (e.g. "a friend of mine") |
|---|---|---|
| Form |
Possessive determiner + noun my, your, his, her, its, our, their + noun |
Article/determiner + noun + of + possessive pronoun a/an/this/that + noun + of + mine/yours/his/hers/ours/theirs |
| Pronouns Used |
my friend your friend his friend her friend our friends their friends |
a friend of mine a friend of yours a friend of his a friend of hers a friend of ours a friend of theirs |
| When to Use | Use to identify a specific, already understood person or thing. Neutral and direct; no implication about quantity or selection among many. | Use when introducing one of several possible people or things, implying the possessor has more than one. Adds a sense of "one among many" or informality/warmth. |
| Positive Example |
My colleague gave me the report. Her sister lives in Paris. Our dog loves the park. |
A colleague of mine gave me the report. A sister of hers lives in Paris. A dog of ours loves the park. |
| Negative Example |
My friend didn't come to the party. His car isn't working. |
A friend of mine didn't come to the party. That car of his isn't working. |
| Question Example |
Is your brother coming? Did their team win? |
Is that brother of yours coming? Did that team of theirs win? |
| Determiner Choices |
Only possessive determiners used: my, your, his, her, its, our, their |
Can combine with: a / an (indefinite article) this / that / these / those (demonstratives) any / some / no / each / every (quantifiers) |
| Emphasis & Tone | Neutral, direct, and factual. No emotional colouring or implication of selectivity. Simply states ownership or relationship. |
Can sound warmer, more informal, or more emphatic. With this/that, can convey mild irritation or strong emotion: That boss of mine never listens! |
| Key Signal Words |
Possessive determiners directly before the noun: my, your, his, her, its, our, their |
Presence of of between the noun and a possessive pronoun; indefinite or demonstrative article before the noun: a … of mine / that … of yours / some … of hers |
| Common Mistakes |
Using possessive determiners with demonstratives (grammatically incorrect): ✗ this my friend ✗ a my colleague |
Using subject/object pronouns instead of possessive pronouns after of: ✗ a friend of me ✓ a friend of mine |
| Formality Level | Neutral — appropriate in all contexts, formal and informal alike. | Often slightly informal or conversational, though grammatically correct in all registers. Especially natural in spoken English. |
| 🔑 Key Difference: The single possessive (my friend) is a neutral, direct way to show ownership or relationship and works in all contexts. The double possessive (a friend of mine) adds an extra layer of meaning — it implies the possessor has more than one of that thing (one among several friends) and cannot be used with a definite article (the). It also allows emotional emphasis when used with demonstratives (that idea of hers!). Crucially, only possessive pronouns (mine, yours, his, hers, ours, theirs) — never subject or object pronouns — follow the preposition of in a double possessive construction. | ||
Formula
✔ Positive
a/an/the
+
noun
+
of
+
mine/yours/his/hers/ours/theirs
A friend of mine lives in London.
Examples
A friend of mine is coming to visit next week.
Everyday conversation · Common usage
Is that book a copy of yours?
Casual question · Personal items
The house of theirs is very big and beautiful.
Descriptive use · Possession
A colleague of his works in the same office.
Professional context · Relationships
An idea of hers won the competition.
Credit and achievement · Person's work
The dog of ours loves to play in the park.
Family possessions · Common in speaking
When to use it
Describing Relationships
Use double possessives when talking about someone's friends, family, or colleagues. It helps you talk naturally about people in your life.
"A brother of mine works as a teacher."
Talking About Ownership
Use double possessives to describe things that people own, like houses, cars, or objects. It sounds more natural in conversation.
"The apartment of ours is near the city center."
Casual Conversation
Double possessives are common in informal, everyday English. They help you sound more like a native speaker when chatting with friends.
"Is this pen a pen of yours?"
Emphasizing Information
When you want to add more details or emphasize a relationship, use double possessives to make your meaning clearer.
"An idea of hers helped us solve the problem."
Signal words
a
an
the
of
mine
yours
his
hers
ours
theirs
Common Mistakes
✕
Wrong
My a friend of mine is arriving tomorrow.
✓
Correct
A friend of mine is arriving tomorrow.
Don't use both the possessive adjective and double possessive together. Choose one form only.
✕
Wrong
A friend of me is coming to visit.
✓
Correct
A friend of mine is coming to visit.
Use the possessive pronoun (mine), not the object pronoun (me) after 'of'.
✕
Wrong
A book of my is on the table.
✓
Correct
A book of mine is on the table.
Use the possessive pronoun (mine), not the possessive adjective (my) in the double possessive structure.
✕
Wrong
The car of his brother is red.
✓
Correct
A car of his brother's is red. OR His brother's car is red.
When adding another noun after the possessive, use 's or choose a different structure.
KEY TAKEAWAYS
What to Remember
- A double possessive uses an article (a, an, the) plus a possessive form together.
- The structure is: article + noun + of + possessive pronoun (mine, yours, his, hers, ours, theirs).
- Double possessives sound more natural than saying "my friend" when emphasizing the relationship.
- Use double possessives to show that something belongs to someone specific.
- Don't use a double possessive with the possessive adjectives (my, your, his, her, our, their).