Active vs. Passive Voice

Passive voice is grammatically correct, but most style manuals frown on its use. It can be an effective structure in the right situations. If you want to place emphasis on the receiver of the action of the verb, passive voice may be the best choice.

Here is an example.

The crowd stormed the Bastille.

This is active voice, and because 'crowd' comes first, your attention is drawn to this word.

The Bastille was stormed by the crowd.

'Bastille' is now the subject in this passive voice sentence, and it is the focus.

Here are a couple of links that may help you.

http://www.grammarly.com/handbook/grammar/verbs/6/passive-verbs/

http://www.grammarly.com/answers/questions/9338-whats-wrong-with-the-passive-voice/

Hello,

Passive voice is used when you don't who did the action or when you want to focus on what was affected by the action (not who did it). Did you specific questions on its form or its uses?