was cleaning, used to clean
Lo encontré mientras limpiaba.
I found it while I was cleaning.
Cuando limpiaba el desván, encontré unas fotos antiguas de mis abuelos.
While cleaning the attic, I found some old photos of my grandparents.
Su mujer dijo que se le disparó una pistola mientras la limpiaba.
His wife said a gun went off while she was cleaning it.
— Perdición (1944)