This document provides information about various past tense verb forms in English including:
1. Past Simple (V2) which is used for single or repeated past actions and past states. Examples are given using time expressions.
2. Past Perfect Simple (had + V3) which is used to talk about actions that happened earlier or before something else in the past. It can also be used for explaining or commenting on past events.
3. Past Progressive (was/were + Ving) which describes things that were in progress or happening repeatedly during a specific time in the past. It can also describe changing states or actions.
4. Past Perfect Progressive (had been + Ving) which is used