This document is an English activity worksheet from Agriculture High School in the Philippines. It contains exercises for students to practice using the past perfect tense. The activity provides the definition and examples of the past perfect tense, which is used to indicate the earlier of two past actions. Students are asked to fill in blanks with the past perfect form of verbs and to complete sentences by adding clauses using the past perfect tense. The objective is to practice supplying the correct form of the past perfect tense in sentences.