... What different offices may a noun perform? Ans.—A noun may be used as a subject, as an object complement, as an attribute complement, as a possessive modifier, as an explanatory modifier, as the principal word in a prepositional phrase, and it may be used independently. Illustrate each use. What are sometimes substituted for nouns? Ans.—Pronouns, phrases, and clauses. Illustrate. What is the principal office of a verb? What offices may be performed by a phrase? What, by a clause? What, different offices may ... — Graded Lessons in English • Alonzo Reed and Brainerd Kellogg