Using ser (not estar) + de to indicate ownership

One of the uses of ser (not estar) is to express ownership, who something belongs to. Have a look and listen to these examples:

Estas medallas eran de mi abuelo.These medals were my grandfather's.

No es tu problema. Es el problema de Andrés.It is not your problem. It is Andrés's problem.

La mansión será de nuestros hijos en el futuro.The mansion will be our children's in the future.

[Something] ser (conjugated)de + [someone]

See also Using preposition de to express possession

Want to make sure your Spanish sounds confident? We’ll map your knowledge and give you free lessons to focus on your gaps and mistakes. Start your Braimap today »

Learn more about these related Spanish grammar topics

Examples and resources

No es tu problema. Es el problema de Andrés.It is not your problem. It is Andrés's problem.
La mansión será de nuestros hijos en el futuro.The mansion will be our children's in the future.
Estas medallas eran de mi abuelo.These medals were my grandfather's.
Clever stuff underway!