Identifying and Correcting Passive Voice
All sentences in passive voice contain two elements: A form of the verb 'to be' (those are: is, are, am, was, were, has been, have been, had been, will be, will have been and being) plus a past participle, which is a verb in the past tense.
In the asteroid example, the 'to be' verb is 'has been' and the past participle is 'discovered.' The direct object that has been found is the 'asteroid.' Hence, the sentence is in passive voice. Note: sentences without a direct object - that's the agent that the subject and verb affect - are never in passive voice.
Another simpler clue in this sentence that it's in passive voice is the preposition 'by.' If you see 'by', there's a strong chance that the sentence is in passive voice. However, 'A large asteroid heading towards Earth has been discovered by the scientific group' could just as easily be 'A large asteroid heading towards Earth has been discovered,' and it would still be a passive sentence without that preposition in there. So, it's a good clue but it's not the be-all-end-all of figuring out if a sentence is in the passive voice. Here's a good rule of thumb: If 'by' isn't in the
sentence and you can't tell who's performing the action, the sentence is probably passive.
To avoid Armageddon without the help of Bruce Willis, place the doers of the action at the front of the sentence and remove the 'to be' verb. So the sentence becomes
- 'The scientific group discovered a large asteroid heading towards Earth.'
- And the world is saved by good style.
First Person Sentences
It's a pretty common belief that sentences in the first person, I or we, can't be passive. After all, if I'm doing it, it can't be unclear who's performing the action, right? It's easy to fall
into this trap, but first person perspective is not an escape from passive voice.
For instance, 'I was stranded on the island by the storm' is passive. You're not stranding yourself on the island. The storm is performing the action of stranding you. To make it active, change it to:
'The storm stranded me on the island.'