estaban trillando
-they/you were threshing
Imperfecto progresivo para el sujetoellos/ellas/ustedesdel verbotrillar.

trillar

Es el caso que los ángeles estaban trillando avena, y él se quedó mirándolos.
So he climbed up, and saw that the angels above were threshing oats, and he looked on.
Palabra del día
la capa