1. NOUN CLAUSE Noun clauses as the name implies, function as nouns. That is, they are word groups with their own subject and verb that in turn function as a subject, object, or complement in a sentence. Noun clauses also function sometimes as nouns of direct address or as appositives.

5. ADJECTIVE CLAUSE Adjective clauses modify nouns or pronouns. Most adjective clauses are also known as relative clauses because they are usually introduced by the relative pronoun who, which, that, whose, or whom . The relative pronoun is the subject or object of the clause it begins. Adjective clauses also usually appear immediately after the word that they modify.