Some linking verbs link the subject to a noun that renames the subject. We call this a predicate nominative.
Here are sentences using the linking verb is with a predicate nominative:
My sister is a girl.
Mrs. Johnson is my teacher.
John is a firefighter.
These sentences use the linking verb was with a predicate nominative:
Dad was a good student.
My neighbor was a professor at the university.
Grandpa was a farmer.
These sentences use the linking verbs are and am to link the subject to a predicate nominative:
I am a writer.
The girls are my friends.
We are a team.
Use the linking verbs is, was, are, am to link a sentence subject to a predicate nominative.
It’s your turn. Which of these sentences has a predicate nominative at the end? Mom is happy. I am a volleyball player. Did you choose the second sentence? Good for you! That sentence links the verb to a noun.