This document provides a summary of units 6-9 from an English textbook. It covers the following topics: 1. Unit 6 discusses using the past simple and used to tense to talk about memories and childhood experiences. Key grammar points include forming the past simple of regular and irregular verbs. 2. Unit 7 covers gerunds, verb+ing forms, and verb+to+infinitive constructions. It also discusses common leisure activities and places to do them. 3. Unit 8 focuses on the past continuous tense and how it differs from the simple past. It also introduces common feelings vocabulary. 4. Unit 9 reviews using can, can't, could, and managed to to talk about abilities