"The Romans used to sing to the gods." Is "gods" an indirect object of "used to sing"?; object of preposition "to"?; or direct object of "used to sing"? I translated this into Latin as; Romani ad deos cantabant. Obviously I chose gods as the object of preposition "to", with "gods" in the accusative. However, i am not sure that i am right, or why the other choices are wrong.