In simple terms, a predicate adjective is the part of the sentence that describes the subject and is used with a linking verb. A predicate can be defined as something that we know to be a true statement. So, if we have the example "The bear is brown", brown would be the predicate adjective that is describing the bear. Another example would be, "John is happy". If we assume this statement to be
. true, then happy would be the predicate adjective which is describing John's mood. As you can see, in both examples the subject and predicate adjective are held together with the linking verb "is".