An adjective used to describe a noun is placed before a noun or follows a linking verb.
-- A linking verb acts as an equal sign, the subject is or becomes the object of the verb.
-- An adjective that follows a linking verb is called a predicate adjective, a type of subject complement.
EXAMPLE USE OF ADJECTIVES:
She wore a pretty dress.
She looked nice. (she = nice)
John waited for the early bus.
John is always punctual. (John = punctual)
EXAMPLE USE OF NOUNS AS ADJECTIVES:
Mom made a batch of almond cookies.
Helen did well on her history test.
A delivery truck was blocking my driveway.
Does this store sell bicycle parts?
EXAMPLE USE OF VERBS AS ADJECTIVES:
Dad and I took a fishing trip. (present participle of the verb to fish)
Mark was pleased with the finished project. (past participle of the verb to finish)
The woman held a sleeping baby. (present participle of the verb to sleep)
The washed sneakers looked as good as new. (past participle of the verb to wash)