A predicate nominative is a noun or pronoun that follows a linking verb and renames or identifies the subject of the sentence. It provides more information about the subject, helping to clarify or define it. For example, in the sentence "The winner is John," the word John serves as the predicate nominative, identifying who the winner is. Predicate nominatives typically follow linking verbs such as "is," "are," "was," and "were." They are essential for constructing sentences that convey identity or classification. In the sentence "Her favorite fruit is mango," the word mango renames the subject, providing specific information about her favorite fruit.