Here's why:
* Predicate: The part of a sentence that tells what the subject does or is.
* Noun: A word that names a person, place, thing, or idea.
A predicate noun renames the subject of the sentence. It follows a linking verb (like "is," "are," "was," "were," "become," etc.) and provides more information about the subject.
Example:
* My best friend is a doctor.
In this sentence:
* "My best friend" is the subject.
* "is" is the linking verb.
* "doctor" is the predicate noun, renaming the subject "my best friend."