The document discusses the causative use of the verb "have" to mean "to have something done." It notes that "have" can be used with an object and past participle to indicate that an action was done by someone other than the subject. Examples are given showing how all tenses can be used, and that "have" can also refer to events outside of one's control. It is mentioned that the more informal verb "get" can sometimes be used instead of "have" in these causative constructions.