The document discusses reflexive pronouns, which are used when the subject and object of a sentence are the same. There are eight reflexive pronouns ending in "-self" or "-selves". Reflexive pronouns are usually used when the object of the sentence is the same as the subject, such as "The boy cut himself" or when emphasizing that someone does something alone, like "You must finish the work by yourself." The document provides a table listing the subject and reflexive pronouns.