Usually, effective writing uses the active voice and shuns the passive. Nevertheless, some situations are awkward or inappropriate when expressed in the active voice. Certainly, these situations call for the passive voice.
But like most of the "rules" of writing (and many of the "rules" of grammar and usage) this one isn't really a rule. There are some times when the passive voice is appropriate, and some times when it is even needed.
In general, it is best to think of writing not as rule-driven, but rather as context-sensitive. Even if a "rule" is useful 99% of the time, rigidly applying it in the rare case where it isn't appropriate will undermine the effectiveness of your writing. I prefer to think of most of the so-called rules of writing as guidelines, some more generally applicable than others.
The rule against using the passive voice happens to be an appropriate guideline most of the time. You are more likely to write badly by ignoring it than by following it. But it's still better to make your writing choices consciously than to go on automatic pilot and let the "rules" do all your writing for you.
What is the passive voice, and what is it used for?
Verbs in English are inflected to show five main traits: person, number, tense, voice, and mood.
Voice is determined by whether the subject of the sentence is theagent or the receiver of the action of a transitive verb. (A transitive verb is one that takes a direct object.
I broke the window.
The boys ate all of the pie.
With the money from her mother's life insurance Diane bought a new car and took a trip to Europe.
In the preceding examples, which are in the active voice, the agent of the action is the subject of the sentence. But in the next set of examples, which are in the passive voice, the receiver of the action is the subject of the sentence.
The window was broken.
The window was broken by me.
All of the pie was eaten.
All of the pie was eaten by the boys.
With the money from her mother's life insurance a new car was bought and a trip to Europe was taken.
With the money from her mother's life insurance a new car was bought and a trip to Europe was taken by Diane.
Notice that when a sentence is written in the passive voice, the agent of an action can be omitted. That is part of the appeal of the passive voice to certain writers. If the writer wishes to obscure responsibility for an action, then the passive voice allows him to eliminate all reference to the person who committed the act. Think of how often statements coming out of the Nixon White House during Watergate were couched in the passive voice: e.g.,
Mistakes were made.
Mistakes were made.
Even if the agent of an action is mentioned in a passive voice sentence, the emphasis is not on the actor, but on the receiver of the action. The subject slot in a sentence is the starring role. Anyone or anything relegated to a little sidecar of a prepositional phrase tacked on at the end of the sentence is not being emphasized at all.
The window was broken.
The window was broken by me.
All of the pie was eaten.
All of the pie was eaten by the boys.
In these sentences, the fact that the window was broken or thatthe pie was eaten sits front and center. In the examples without agents, no one in particular appears to be responsible for the broken window or the devoured pie. And even in the sentences where the guilty parties make an appearance, they do so in a way that does not call attention to them.
But sometimes the agent of an action needs to be omitted. For example, the textual conventions*** governing lab reports do not permit the use of the first person ("I" or "we") at all, and in fact any mention of the researchers, even in the third person, is frowned upon. Thus, lab reports are filled with clauses like these: the pigeons were observed over a period of three weeks; the subjects were divided into three groups; members of the control group were given a placebo. . . .
The reason for this convention is that science is supposed to be objective, and removing all reference to the researchers emphasizes that stance of objectivity. It's almost as if disembodied hands are performing the experiments, and disembodied eyes are observing the results.****
The use of the passive voice in lab reports also keeps the spotlight focused on the experiment itself, rather than yanking it over to the researchers. It's a matter of emphasis.
Now, here are a few passive voice sentences from earlier in this very article, and one from another article on this website:
~Notice that in these sentences, the fact that the window was broken and the pie was eaten sits front and center.
Anyone or anything relegated to a little sidecar of a prepositional phrase tacked on at the end of the sentence is not being emphasized at all.
Another problem with many English classes is that students are usually taught by teachers that think writing is "rule-driven."
Now watch what happens to my intended meaning and emphasis if I try to recast these as active voice sentences:
Notice that in these sentences, the fact that someone broke the window and someone ate the pie sits front and center.
When anyone or anything is relegated to a little sidecar of a prepositional phrase tacked on at the end of the sentence, then the writer is not emphasizing that person or thing at all.
