The document defines and provides examples of indirect objects in sentences. An indirect object answers the questions "to whom?" or "for whom?" and receives the direct object. It can only be used if the sentence also contains a direct object. Prepositional phrases beginning with "to" or "for" are not considered indirect objects. The document then provides 20 sentences and asks the reader to underline the indirect object in each, labeling any direct objects with "d.o.".