We use the passive voiceThe form of the transitive verb that shows whether the subject acts (active voice) or is acted upon (passive voice). when we want to avoid naming the specific person responsible for an actionA general term expressing that somebody or something does something.

We use the passive voiceThe form of the transitive verb that shows whether the subject acts (active voice) or is acted upon (passive voice). when it is obvious who performs the actionA general term expressing that somebody or something does something. In this case the agentThe doer of an action; the person or the thing that does something. E.g.: True Romance was written by Tarantino. ("Tarantino") is usually not mentioned in the passive sentence.

The murderer has been arrested. (i.e. by the police)

We use the passive voiceThe form of the transitive verb that shows whether the subject acts (active voice) or is acted upon (passive voice). when the agentThe doer of an action; the person or the thing that does something. E.g.: True Romance was written by Tarantino. ("Tarantino") of the sentence is people, one, nobody, everybody etc. These are ususally omitted in the passive sentence.

In the Netherlands some light drugs can be purchased at coffee shops.
The Mona Lisa can be seen in Paris.

We use the passive voiceThe form of the transitive verb that shows whether the subject acts (active voice) or is acted upon (passive voice). when we do not know who performs the actionA general term expressing that somebody or something does something or it is not important. In this case the agentThe doer of an action; the person or the thing that does something. E.g.: True Romance was written by Tarantino. ("Tarantino") is not mentioned in the passive sentence.

Tom’s bike has been stolen.
I was advised to obtain a visa in advance.

We use the passive voiceThe form of the transitive verb that shows whether the subject acts (active voice) or is acted upon (passive voice). (instead of the active) when we want to shift the focusThe main or central point of attention or interest; what is emphasized. E.g.: All I wanna do is have some fun. ("all") of attention from the agentThe doer of an action; the person or the thing that does something. E.g.: True Romance was written by Tarantino. ("Tarantino") to the objectA person or thing that is affected by the action of a verb or involved in the result of an action. of the sentence. This means that the agent may not be so important and may be omitted in the passive sentence.

The agentThe doer of an action; the person or the thing that does something. E.g.: True Romance was written by Tarantino. ("Tarantino"), which is the subjectThe person or thing that performs the action of a verb or that is described by a verb. E.g.: Andy has never been to Brunei. ("Andy") of the active sentence, is the person or thing that performs the actionA general term expressing that somebody or something does something and it may or may not be mentioned in the passive sentence. If it is, it is preceded by the preposition by.