The document provides examples of using the past continuous tense (was/were + -ing) in different contexts:
1. To describe an activity that was interrupted by something else.
2. To describe two simultaneous but independent actions in the past.
3. To specify that an action was occurring at a particular past time.
It then gives additional examples using the past continuous tense to talk about unfinished past activities, background actions, repeated annoying habits, polite phrases, emphasizing duration, and verbs that show change.