This document provides a grammar lesson on the past progressive/continuous tense in English. It begins by presenting example sentences using the past progressive and asks students to identify the common structure. The main topics of the lesson are then introduced as the past progressive tense and how it emphasizes ongoing past actions or two simultaneous past actions. Key points covered include how to form positive, negative, and question sentences in the past progressive and spelling rules. The lesson distinguishes between using "while" and "when" with the past progressive and provides tips on their proper usage, such as using "while" for actions with a duration and "when" for longer states or periods. Students are then directed to online practice exercises to reinforce the concepts.