The document discusses the passive voice in Spanish. It begins by distinguishing between the active voice, where the subject performs the action of the verb, and the passive voice, where the action of the verb is received by the object. It then provides instructions for transforming an active sentence into a passive sentence by making the object the subject and using the verb "to be" plus the past participle. Examples are given of active and corresponding passive sentences. Finally, it discusses how the verb changes form depending on its tense in the original active sentence and provides five more examples of sentences transformed from active to passive voice.