Usages of abierto
La ventana está abierta.
The window is open.
El libro está abierto.
The book is open.
Ellos preguntan si la biblioteca está abierta hoy.
They ask if the library is open today.
Mi hermano come con la boca abierta.
My brother eats with his mouth open.
Elon.io is an online learning platform
We have an entire course teaching Spanish grammar and vocabulary.