ACTIVE & PASSIVE VOICE The action of a verb and the person(s) or thing(s) responsible for it, can be conveyed in two ways: the active voice and the passive voice.
The ACTIVE VOICE is the most common: it expresses the action of the verb, directly linking it to the person or thing carrying out the action.
The car stopped suddenly. The girl picked up a book. The PASSIVE VOICE changes the focus of the sentence by reordering the elements. The basic structure of the passive is as follows:
the subject of the active sentence (the person or thing doing the verb) is moved to the end of the passive sentence and becomes the optional passive agent.
The murder was committed by the infamous Mr Smith.
The gold Logie was won by Rove McManus.
If the subject is a long phrase that seems awkward at the start of the sentence, it can be placed at the end to aid in coherence and cohesion.
A tremendous meal was prepared and served by the cooks and waiters from the local hotel, who trained at the college.
By omitting the subject, it is possible to exclude the person or thing responsible for the action of the verb.
Despite the explosion, nuclear power was reported [by the government] to be quite safe. In the following set of passive examples the subject is omitted purposely:
A new shopping centre is being built near the freeway.
Here the identity of the subject, probably a real-estate developer, is not highly relevant to the news concerning the building of the new shopping centre.
The heavens opened and we were drenched.
The subject – the rain, is understood from the first part of the sentence.
Three grams of sodium chloride were added to the solution.
Omitting the subject is a characteristic feature of certain text types. Here it enables scientific reports to avoid constant reference to the scientist conducting the experiment or research.
Cardholders are required to supply proof of identity.
Here the subject is omitted because it allows text to maintain a tone and style of impersonality, seen as preferable by the creator.