The document discusses predicate nouns and linking verbs. It provides examples of sentences containing a subject, linking verb such as forms of "be", and a predicate noun that renames the subject. Some key points: - A predicate noun follows a linking verb and refers to the same person, place, thing, or idea as the subject. - Many examples are given of sentences containing a subject, linking verb such as "is", "are", "was", etc., and a predicate noun. - Predicate nouns rename the subject and follow a linking verb.