The document discusses the passive voice in English and provides examples of sentences in both the active and passive voice. It shows sentences where the subject receives the action expressed by the verb, such as "Bicycles will be removed if locked to these railings" and its active equivalent "We will remove bicycles if you lock them to these railings." It also lists rules written in the passive voice found on signs, such as "Dogs must be kept on a lead" and "Ball games are not allowed."