With a normal passive voice you can simply change the voice.
Ex:
"The ball was kicked by the boy," becomes "The boy kicked the ball."
But with an implied object it isn't so easy.
Ex: "He was given the sword."
The sentance is writen as passive yet doent give an agent and would be left to context and then you may still not know what the subject is. How would you translate this into Dovahzul?