Possessive Adjectives in Spanish

In Brief

Spanish short-form possessive adjectives go before a noun: mi libro (“my book”), tu casa (“your house”), nuestra familia (“our family”). They agree with the thing possessed, not with its owner: use mi with one thing and mis with several things. Only nuestro and vuestro also change for gender.

Overview

A possessive adjective shows a relationship such as ownership, family connection, or association: mi teléfono is “my phone,” su madre is “his/her/your/their mother,” and nuestro equipo is “our team.” A noun is a word for a person, place, thing, or idea; the possessive adjective comes directly before that noun and helps identify it.

This is an A1 topic because these forms are essential for introducing family, talking about belongings, and describing everyday life. The beginner pattern is simple: choose the form for the owner, then make it agree with the number—and sometimes the gender—of the thing being discussed.

English uses different words for his, her, your, and their. Spanish often uses the single form su, so context does more work. This is not usually a problem in conversation, but Spanish has clear alternatives when the owner needs to be identified.

How It Works

The short-form possessives

These are called “short-form” possessives because they appear before the noun. Agreement means changing a word to match grammatical features of another word. Here, the possessive agrees with the noun that follows it.

Owner	Singular thing	Plural things	Basic meaning
yo	mi	mis	my
tú	tu	tus	your (informal singular)
él, ella, usted	su	sus	his, her, your (formal singular)
nosotros/as	nuestro, nuestra	nuestros, nuestras	our
vosotros/as	vuestro, vuestra	vuestros, vuestras	your (informal plural, mainly Spain)
ellos, ellas, ustedes	su	sus	their, your (plural)

The singular and plural labels refer to what follows, not to the number of owners:

• mi amigo — my friend
• mis amigos — my friends
• su casa — his/her/your/their house
• sus casas — his/her/your/their houses

One owner can have plural possessions (mis llaves), and several owners can share one possession (su apartamento, “their apartment”). Do not choose su or sus by counting the owners.

Gender agreement: only nuestro and vuestro

Mi, tu, and su do not have masculine and feminine forms:

• mi libro and mi casa
• tu hermano and tu hermana
• su trabajo and su oficina

Nuestro and vuestro, however, match both the gender and number of the noun:

Noun	Our	Your (informal plural, mainly Spain)
masculine singular: libro	nuestro libro	vuestro libro
feminine singular: casa	nuestra casa	vuestra casa
masculine plural: libros	nuestros libros	vuestros libros
feminine plural: casas	nuestras casas	vuestras casas

The owner’s gender is irrelevant. A woman says nuestro hijo if she means “our son”; a man says nuestra hija if he means “our daughter.” The endings follow hijo and hija.

Position and articles

The normal beginner pattern is:

possessive adjective + noun

• mi coche
• tu nueva dirección
• nuestros buenos amigos

Other descriptive adjectives may follow the noun or, in some cases, stand between the possessive and noun. The possessive remains before the whole noun group: mi libro favorito, nuestra primera casa.

Do not normally combine a short possessive with el, la, los, or las. Spanish says mi casa, not la mi casa. The possessive already identifies the noun. The same principle applies where English has “a”: Es amigo mío or Es mi amigo, not usually a direct article-plus-short-possessive pattern.

Tu and tú are different words

The possessive tu has no written accent: tu mochila (“your backpack”). The subject pronoun tú means “you” and does have an accent: Tú tienes una mochila (“You have a backpack”). Likewise, mi means “my,” while mí is the pronoun used after a preposition, as in para mí (“for me”).

Understanding su and sus

Su and sus can refer to several possible owners:

• su libro — his book, her book, your book, or their book
• sus hijos — his children, her children, your children, or their children

Use context when it is obvious. If it is not, replace the possessive with a definite article plus de (“of”) and the owner:

• el libro de Ana — Ana’s book
• el coche de él — his car
• la casa de ellos — their house
• la opinión de usted — your opinion (formal)

Spanish has no apostrophe-s ownership structure. A phrase such as “María’s brother” is el hermano de María.

Examples in Context

Spanish	English	Note
Este es mi libro.	This is my book.	One possessed item: mi.
No encuentro mis llaves.	I can’t find my keys.	Plural noun: mis.
¿Cuál es tu dirección?	What is your address?	Informal singular “your.”
Tus padres son muy amables.	Your parents are very kind.	Tus agrees with plural padres.
Carlos vive con su hermana.	Carlos lives with his sister.	Context identifies su as “his.”
Elena busca sus gafas.	Elena is looking for her glasses.	Gafas is plural, so use sus.
¿Cómo está su familia, señora Ruiz?	How is your family, Ms Ruiz?	Formal singular “your.”
Nuestra familia vive en Granada.	Our family lives in Granada.	Feminine singular familia.
Nuestro hijo estudia medicina.	Our son studies medicine.	Masculine singular hijo.
Nuestros amigos llegan mañana.	Our friends arrive tomorrow.	Masculine plural amigos.
Nuestras maletas están en el hotel.	Our suitcases are at the hotel.	Feminine plural maletas.
¿Dónde están vuestros abrigos?	Where are your coats?	Informal plural usage typical of Spain.
Ustedes pueden dejar sus bolsas aquí.	You can leave your bags here.	Sus refers to plural “you.”
Marta y Luis venden su casa.	Marta and Luis are selling their house.	Several owners, one house: su.
Es el despacho de ella, no el de él.	It is her office, not his.	De ella/de él removes ambiguity.

Common Mistakes

Making mi, tu, or su agree for gender

• Wrong: mía casa
• Right: mi casa
• Why: Before a noun, mi does not change for gender. Mía belongs to the long-form system discussed later.

Matching the possessive to the owner

• Wrong: nuestro hija (because the owners include a man)
• Right: nuestra hija
• Why: The possessive agrees with hija, the feminine noun, not with the people who are speaking.

Counting owners instead of possessions

• Wrong: Marta y Pablo visitan sus abuela.
• Right: Marta y Pablo visitan su abuela.
• Why: There is one grandmother, so use singular su. The fact that Marta and Pablo are two owners does not require sus.

Adding a definite article

• Wrong: la mi familia
• Right: mi familia
• Why: Standard modern Spanish normally does not place el/la/los/las before a short-form possessive.

Confusing tu with tú

• Wrong: tú casa
• Right: tu casa
• Why: Tu without an accent means “your.” Tú with an accent is the independent word “you.”

Assuming su has only one meaning

• Unclear: Es su habitación.
• Clear when needed: Es la habitación de ella.
• Why: Su may mean “his,” “her,” formal “your,” plural “your,” or “their.” Keep it when context is enough; use a de phrase when misunderstanding is possible.

Usage Notes

Vuestro in Spain and su in Latin America

In most of Spain, speakers commonly use vosotros/vosotras for informal plural “you,” with vuestro/a/os/as: ¿Dónde está vuestro hotel? Formal plural address uses ustedes and su/sus.

Across Latin America, ustedes is normally used for plural “you” in both informal and formal settings, so su/sus is the everyday choice: ¿Dónde está su hotel? Learners do not need to mix the two systems. Choose the variety relevant to you, but learn to recognize both.

Possession is broader than ownership

These forms also express family and social relationships (mi hermana, nuestros vecinos), body-related descriptions (mi mano), habitual association (tu oficina), and ideas or experiences (su opinión, nuestros planes). They do not always mean legal ownership.

Spanish often uses a definite article rather than a possessive for body parts and clothing when the person is already clear, especially with reflexive verbs or object pronouns: Me lavo las manos (“I wash my hands”), not normally Me lavo mis manos. English speakers tend to overuse possessives here because English requires “my.” Use the possessive when contrast or identification matters: No es mi abrigo; es el tuyo (“It isn’t my coat; it’s yours”).

Choosing clarity over repetition

Repeated su can become hard to follow in a story involving several people. Spanish naturally names the owner with de: Juan habló con Pedro sobre la empresa de Pedro. This may sound more repetitive in English, but in Spanish it can be the clearest option.

Beyond the Basics / Advanced Use

You do not need to master this section at A1, but you will encounter another set of possessive forms: mío/a/os/as, tuyo/a/os/as, suyo/a/os/as, nuestro/a/os/as, and vuestro/a/os/as. These long-form possessives usually appear after a noun or stand without a noun:

• un amigo mío — a friend of mine
• una idea suya — an idea of his/hers/yours/theirs
• Este libro es mío. — This book is mine.
• La nuestra está aquí. — Ours is here.

Unlike short mi, tu, and su, all long forms show gender and number agreement with the thing possessed: un amigo mío, una amiga mía, unos amigos míos, unas amigas mías. In Es mío, the noun may be unstated, but the ending still reflects the thing being referred to.

The choice between short and long forms can change emphasis. Mi opinión simply identifies “my opinion.” Una opinión mía means “an opinion of mine,” one among possible opinions, while La opinión es mía presents possession as new or contrastive information. Long suyo can remain just as ambiguous as short su, so de él, de ella, de usted, or de ellos is still useful.

Short possessives can occasionally be coordinated over more than one noun: mi hermano y hermana. In careful speech or writing, repeating the possessive—mi hermano y mi hermana—often sounds clearer, especially if the nouns differ in number or could have different owners.

You may also see article-plus-possessive combinations in older literature, regional speech, or fixed expressions. Forms such as la mi casa are not the productive neutral pattern to copy as a learner. Use mi casa in ordinary modern Spanish.

Practice Tips

1. Build four-way sets. Take a noun pair such as libro/libros and casa/casas, then say nuestro libro, nuestros libros, nuestra casa, nuestras casas. This trains agreement with the possessed noun.
2. Resolve su aloud. For each sentence containing su, ask who it could refer to. Then rewrite it with de él, de ella, de usted, or de ellos. This turns ambiguity into a deliberate choice.
3. Notice the English trap. When translating a daily routine, check body parts and clothing. Compare English “I wash my hands” with Me lavo las manos, and listen for where Spanish uses an article instead of a possessive.

Related Concepts

• Prerequisite: Definite Articles — reviews gender and number agreement with nouns and helps explain when Spanish chooses an article instead of a possessive.