A predicate adjective is an adjective that follows an intransitive linking verb and describes the subject. Verbs of the senses are often followed by predicate adjectives.
Intransitive linking verbs are forms of the verb to be, words of change like remain, become, and seem, and verbs of the senses.Examples of intrasitive linking verbs that may be followed by a predicate adjective:
Predicate adjectives are turquoise.
Subject = leaves
Intransitive linking verb = are
Predicate adjective = colorful
Colorful describes the subject, leaves.
Subject = apples
Intransitive linking verb = taste
Predicate adjective = crisp, sweet
Crisp and sweet describe the subject, apples.