Possessives in Spanish: Mi, Tu, Su and the Long Forms
Possessives in Spanish look simple at first — mi, tu, su — until you realize there's a whole second set of longer forms and that su can mean about five different things. This guide walks you through both systems so you always pick the right one.
Short Possessive Forms
These are the possessives you'll use most often. They go before the noun, just like in English, and they agree in number with the thing being possessed — not with the owner.
Notice that mi, tu, su only change for plural (mis, tus, sus) — they don't care about gender. But nuestro changes for both: nuestro/nuestra/nuestros/nuestras.
Long Possessive Forms
Spanish has a second set of possessives that go after the noun or stand on their own. They're used for emphasis, in certain expressions, and any time you want to say "mine," "yours," etc. without a noun attached.
Long forms always match the gender and number of the noun they refer to. So "mine" can be mío, mía, míos, or mías depending on what you're talking about.
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Su vs De Él / De Ella
Since su can mean his, her, its, your (formal), or their, it sometimes creates ambiguity. When context doesn't make the owner clear, replace su with de + person.
In everyday conversation, su is almost always understood from context. Only switch to "de él/ella" when there's genuine confusion — like when two people of different genders were just mentioned.
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Common Possessive Expressions
Possessives show up in a bunch of fixed expressions you'll hear constantly. These are worth memorizing as complete phrases.
Notice that expressions with long possessives (mío, tuyo, suyo) tend to sound more emphatic or emotional. That's why ¡Dios mío! carries more weight than it would with just mi.
Frequently Asked Questions
What is the difference between mi and mío in Spanish?
Mi is a short possessive that goes before the noun ("mi casa" = my house). Mío is a long possessive that goes after the noun or stands alone ("es mío" = it's mine, "un amigo mío" = a friend of mine). They express the same ownership but are used in different positions.
Why does "su" mean so many things in Spanish?
Su can mean his, her, its, your (formal), or their. Context usually makes it clear, but when it doesn't, Spanish speakers switch to "de él," "de ella," "de usted," or "de ellos" to avoid confusion.
Do possessives change for masculine and feminine in Spanish?
Short possessives mi, tu, su do not change for gender — only for number (mi/mis, tu/tus, su/sus). However, nuestro and vuestro do change: nuestro/nuestra, nuestros/nuestras. All long forms change for gender and number: mío/mía/míos/mías.