Possessive adjectives are determiners that show who owns or is linked to a noun. They always come before a noun, or before an adjective and noun together, and they modify the noun rather than replacing it. Their job is different from possessive pronouns, which stand alone and do not need a noun after them.

English possessive adjectives change according to the possessor, not according to the noun that follows them. The form stays the same whether the noun is singular or plural, and whether the noun is masculine, feminine, or neuter. The inventory includes my, your, his, her, its, our, your, and their.

Idea	Example
1st person singular uses my.	my bag
2nd person singular and plural uses your.	your notes
3rd person singular masculine uses his.	his coat
3rd person singular feminine uses her.	her garden
3rd person singular neuter uses its.	its paw
1st person plural uses our.	our house
3rd person plural uses their.	their backpacks

Possessive adjectives normally come directly before the noun they modify. If an adjective is present, the possessive adjective still comes first, before the adjective and noun together. This placement is fixed, so the possessive form cannot move after the noun like a descriptive adjective can in some special structures.

Idea	Example
A possessive adjective comes before a noun.	my key
It comes before an adjective and noun together.	my new phone
It functions as a determiner, not a standalone pronoun.	her idea

Possessive adjectives express ownership, relationship, or close association. They do not mean the same thing as possessive pronouns, because a possessive pronoun replaces the noun phrase while a possessive adjective needs one. The contrast appears clearly in pairs such as Possessive Pronouns, where my book is followed by the noun and mine stands alone.

Idea	Example
A possessive adjective needs a noun after it.	my book
A possessive pronoun stands alone.	mine
The two forms can express the same relationship in different structures.	her bag and hers

Its is the possessive adjective for things and animals, and it never takes an apostrophe. It’s is a different form that means it is or it has. The spelling difference is important because the apostrophe marks a contraction, not possession, and the same contrast appears in many English spelling patterns taught in Adjective Placement and related adjective lessons.

Idea	Example
Its shows possession.	its collar
It’s is a contraction.	it’s sunny
Possessive adjectives never use an apostrophe.	its box

Possessive adjectives agree with the possessor, not with the noun they modify. That is why the form changes for person and number, while the noun after it can be singular or plural without changing the possessive word. This pattern is part of the broader system of determiners and contrasts with descriptive words studied in Descriptive Adjectives and Adjective Formation.

Idea	Example
The form matches the owner.	her car
The noun after it can be singular.	our book
The noun after it can be plural.	our songs

Some possessive forms extend beyond simple ownership. One’s is a formal generic possessive used in general statements, and singular they commonly uses their to refer to a person whose gender is unknown or irrelevant. Possessive adjectives can also appear before gerunds to show the agent of an action, as in his singing, and these patterns are often clearer when compared with Adjective Placement.

Idea	Example
One’s is a formal generic possessive.	one should mind one’s manners
Their can be gender neutral for one person.	someone left their coat
A possessive adjective can show the agent of a gerund.	I liked his singing

Possessive adjectives are short words that come before nouns to show ownership or close connection. They include my, your, his, her, its, our, your, and their, and they agree with the possessor rather than the noun. Their fixed position, lack of apostrophe, and difference from possessive pronouns make them a central part of English noun phrases.