A concept map about the Past Continuous designed to help students understand when and how to use this important English tense. The map explains how the Past Continuous expresses an action in progress at a particular time in the past and how it is often used with the Past Simple when an action in progress is interrupted by another action. It also presents the structures for affirmative, negative and interrogative sentences, short answers, and the use of the auxiliary to be with the verb ending in -ing. A useful English grammar summary for studying, reviewing and learning the main rules.