Which one of the following sentences contains a predicate adjective?

A. We scanned the distant shore for signs of life.

B. The teacher appeared angry when Dave forgot his homework.

C. What does this hard lesson teach you?

D. I brought my lunch for the first time this year.

A predicate adjective is an adjective that follows a linking verb (a verb such as "is" "looks", "appears") and which modifies the subject of the sentence.

Here the linking verb is "appeared" and the adjective is "angry" and the sentence with a predicate adjective is B. The teacher appeared angry when Dave forgot his homework, where the predicate adjective is "appeared angry"