This presentation discusses voice in English grammar including the active and passive voice. It defines voice as the form a transitive verb takes to indicate whether the subject performs or receives the action. The active voice indicates the subject is performing the action, while the passive voice has the subject receiving the action. Reasons to use the active voice include being more direct, concise, and propelling the reader forward. In contrast, the passive voice is less direct and forceful. The presentation provides examples of converting sentences from active to passive voice while retaining the same tense.