This document explains how to use the past continuous tense in English grammar. The past continuous describes an action that was ongoing or in progress at a specific time in the past. It is used to indicate that a longer action in the past was interrupted by a shorter action expressed in the simple past tense. Examples are provided such as "I was watching TV when she called" and "While we were having a picnic, it started to rain." Exercises are included to practice forming past continuous sentences and identifying their grammatical structure.