could, were able to
Solo podíamos sentarnos aquí y verlas.
All we could do was sit here and watch them.
— La princesa Mononoke (1997)
El enano respira tan fuerte que podíamos haberlo matado de noche.
The dwarf breathes so heavily we could have killed him at night.
— El señor de los anillos: La comunidad del anillo (2001)
Ella dijo que podíamos ir al parque.
She said we could go to the park.