Possessive pronouns replace a noun phrase to show ownership or close association. They stand in the noun slot of a sentence and are used when the noun itself is already understood. Their forms are fixed and correspond to person and number rather than to the noun they replace.

These pronouns mark the same possessive relationship as possessive adjectives, but they do not appear before a noun. The forms are fixed in English, and his serves for masculine reference and for neutral reference when context requires it. The form its is used for possession, while it's is a contraction of it is.

Person	Pronoun	Example
First singular	mine	The red pen is mine.
Second singular or plural	yours	The seats near the window are yours.
Third singular masculine	his	That jacket is his.
Third singular feminine	hers	The final choice is hers.
Third singular neutral	its	The shelter and its are not the same form.
First plural	ours	The front row is ours.
Second plural	yours	These microphones are yours.
Third plural	theirs	The bicycles by the gate are theirs.

A possessive pronoun replaces the entire noun phrase and occupies the same grammatical position as the noun itself. It can be the subject complement after linking verbs, or it can appear in a short answer when the full noun phrase is omitted. Because it already functions like a noun, it should not be followed directly by another noun.

Idea	Example
It replaces a noun phrase.	That book is mine.
It can follow a linking verb.	The choice is hers.
It can stand alone in a short answer.	Whose bag is this? It is ours.
It does not directly modify a noun.	Mine book is incorrect.
It occupies the noun slot in a phrase.	A friend of mine arrived early.

Possessive adjectives and possessive pronouns express the same relationship, but they appear in different positions. A possessive adjective comes before a noun, while a possessive pronoun replaces the noun phrase completely. This difference is essential in pairs such as my book and mine, your car and yours, or their plan and theirs.

Idea	Example
A possessive adjective comes before a noun.	My book is on the table.
A possessive pronoun replaces the noun.	The book on the table is mine.
The pronoun removes the noun after the meaning is clear.	This seat is yours.
The adjective and pronoun are not interchangeable in the same position.	Your idea is better than mine.
Contrastive focus often compares mine and yours.	Mine is blue, yours is green.

English often uses a possessive pronoun after of to refer to an owner in an idiomatic double possessive. This pattern is common in spoken English and usually highlights a person rather than a thing. The structure allows a noun to be identified through a broader group, as in a friend of mine or a colleague of hers.

Idea	Example
The pattern of plus possessive pronoun identifies the owner.	A friend of mine called today.
It is common in everyday speech.	A colleague of hers works here.
It often sounds natural when the owner is one member of a group.	That idea came from a student of ours.

Possessive pronouns replace noun phrases, while possessive adjectives still need a noun after them. The main forms are mine, yours, his, hers, its, ours, yours, and theirs, and they keep the meaning of ownership without changing to match gender or number beyond the established set of forms. When the noun is already understood, these pronouns make English concise, precise, and naturally linked to related structures such as relative pronouns and demonstrative pronouns.