Active Form
In active sentences, the thing doing the action is the
subject of the sentence and the thing receiving the action is the object. Most
sentences are active.
[Thing doing action] + [verb] + [thing receiving action]
Examples:
We are going to watch a movie tonight.
Passive Form
In passive sentences, the thing receiving the action is the
subject of the sentence and the thing doing the action is optionally included
near the end of the sentence. You can use the passive form if you think that
the thing receiving the action is more important or should be emphasized. You
can also use the passive form if you do not know who is doing the action or if
you do not want to mention who is doing the action.
[Thing receiving action] + [be] + [past participle of verb]
+ [by] + [thing doing action]
Examples:
A movie is going to be watched by us tonight.