Do you have the answer choices?
<span>When using active voice, the subject
performs the action noted by the main verb. (As one site put it, the
subject is a do-er or a be-er.)
When using the passive voice, the
subject is acted upon by another agent or an unknown something. (The
subjects of passive sentences are not do-ers or be-ers.)
These are much better explained with examples:
Active: Brutus stabbed Caesar.
Passive: Caesar was stabbed by Brutus.
Active: The committee approved the new policy.
Passive: <span>The policy was approved of by the committee.</span></span>
<span>The predicate is the part of a sentence (or clause) which tells us whatthe subject does or is. To put it another way, the predicate is everything that is not the subject. At the heart of the predicate is a verb.</span>