The document provides information about the past perfect tense in English grammar. It explains that the past perfect is used to describe an action that was completed before another past action. It gives the example sentence "I had already spoken to Jack when I came here." It also provides the formation of the past perfect tense using auxiliary verbs and past participles. Several examples of transforming verbs into the past perfect tense are given. The document concludes by asking the reader to transform verbs into either the positive or negative past perfect simple form.