They have finished their homework, so they're going to go play baseball for a while.Han terminado la tarea, así que van a salir a jugar a la pelota un rato.
What are the kids doing? - They have finished their homework, and now they're watching TV.¿Qué están haciendo los niños? - Terminaron la tarea y ahora están viendo tele.
If they have finished their homework, sometimes the teacher lets the students leave early.Si acabaron la tarea, a veces el profesor deja que los alumnos se vayan temprano.