The agent

CA67

 

The subject of the active sentence is, as a rule, not mentioned in the passive sentence. If, however, we want to refer to the agent of the action in the passive sentence, we can do so by using a prepositional phrase introduced with von or durch.

 

 

Example with von:

 

active   passive
Der Mechaniker repariert den Motor. Der Motor wird vom Mechaniker repariert.
"agent" = subject
         
"agent" = prepositional phrase
 
 
 

 

 

Example with durch:

 

active   passive
Diese Therapie beschleunigt die Heilung. Die Heilung wird durch diese Therapie beschleunigt
"agent" = subject
         
"agent" = prepositional phrase
 
 
 

 

 

As far as the choice between von or durch is concerned, for expressing the subject of the active sentence into the passive, please note the following:

  • Von is used mainly for persons or institutions like the society, school, state, etc.
  • On the other hand, durch is mostly used to state the medium or the instrument.

 

 

Note:

 

The agent is not mentioned in the passive sentence when the indefinite pronoun man is the subject of the active sentence.

 

active   passive
Man trinkt viel Bier. Viel Bier wird von man getrunken.
"agent" = subject
         
"agent" = prepositional phrase
 
 
 
   
FALSE