*Examples*
Marce, quid novi?- Marcus what’s up?
Marcus is being asked a question he is being spoken to
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In a nominative predicate there is always a verb that links the subject and the predicate nominative itself or the object being talked about
Ex; Bobby was a firefighter or Charles will be the prince- Bobby and Charles being the subject being connected to the object or thing, the firefighter and the prince, by the verbs was and will be