The Agent in Passive Voice The subject in a passive sentence is being acted upon. The person performing the action is called the agent. The agent is expressed using the dative preposition VON. example : Ich werde von meinem Freund abgeholt. I will be picked up by my friend. If the action of the verb is performed by a thing, rather than a person, that instrument is expressed using the accusative preposition DURCH. example : Die Bücher werden durch die Schule gekauft. The books will be bought by the school.
A THING AS AGENT (DURCH) A PERSON AS AGENT (VON) ACTIVE PRESENT TENSE Columbus entdeckt Amerika in 1492 PASSIVE PRESENT TENSE PASSIVE PAST TENSE A THING AS AGENT (DURCH) ACTIVE PRESENT TENSE The library is selling the books. PASSIVE PRESENT TENSE PASSIVE PAST TENSE