This document provides instructions on how to use different past tenses in English, including the past simple, past continuous, past perfect, and past perfect continuous tenses. It defines each tense and provides examples of their use in positive, negative, and interrogative sentences. The past simple tense is used for completed past actions, the past continuous for ongoing past actions, the past perfect for actions completed before a point in the past, and the past perfect continuous for ongoing past actions completed before another past action.