The document provides information on the present perfect continuous and present perfect tenses in English grammar. It discusses the usage of the present perfect continuous tense to refer to actions that began in the past and are ongoing or just completed at the present time. Examples are given like "I've been living in London for two years." It also compares the present perfect continuous and present perfect tenses, noting that the present perfect continuous focuses on duration or length of time while the present perfect focuses on numbers or amounts. Grammar exercises are then provided to practice using the present perfect continuous tense.