This document provides instruction on forming and using the past perfect tense in English. It outlines the structure of positive and negative statements, yes/no questions, and "WH" questions in the past perfect. It then gives five examples of common uses of the past perfect tense: (1) to indicate an action completed before something else in the past, (2) to explain or give a reason for something in the past, (3) with stative verbs to indicate something that started in the past and continued up to another past action, (4) in hypothetical or unreal situations, and (5) in reported speech.