Relative pronouns introduce groups of words that act as adjectives and are commonly found in the middle of sentences. Relative pronouns can include the pronouns who, whom, whose, and which. Since some of these pronouns can be used in many ways, pay attention to their placement and use in each sentence. These interrogative pronouns are frequently used in questions. An adjective is a word that modifies or describes a noun or pronoun.
Adjectives usually precede the noun or pronoun it modifies.
Adjectives formed from proper nouns are called proper adjectives. Proper adjectives are always capitalized. The verb is the main word in the predicate of a sentence. Some verbs express action and are called action verbs. Other verbs link the subject with a word or words in the predicate and are called linking verbs.