they were playing
Estaban jugando en el parque cuando empezó a llover de golpe.
They were playing in the park when it suddenly started to rain.
Estaban jugando al béisbol en el parque.
They were playing baseball in the park.
Tres niños estaban jugando en el parque.
Three children were playing in the park.
Un grupo de niños estaban jugando.
A group of children were playing.
Estaban jugando con las almohadas.
They were playing with the pillows.
They were just playing.