Use of Estar + Past Participle
Spanish: AQA A Level, topic 16.29.1
'Estar' + Participio - 'Estar' + Past Participle
It is used to indicate the state of something.

'Estar' + Past Participle
- This structure is used to indicate the state of something.
- In this case, the past participle acts as an adjective.
- That is why it has to agree with the gender of the noun and also the singular or plural.

Examples
- Hoy está puesta la mesa para el cumpleaños de nuestro abuelo.
- Today the table is laid for the birthday of our grandfather.
- Los problemas están solucionados y no hay más que hacer.
- The problems are solved and there is nothing more to do.
- Los niños están preparados para ir a la playa con sus amigos.
- The children are prepared to go to the beach with their friends.