PAST PROGRESSIVE TENSE
The PAST PROGRESSIVE TENSE indicates continuing action, something that was happening, going on, at some point in the past. This tense is formed with the helping "to be" verb, in the past tense, plus the present participle of the verb (with an -ing ending):
Joel was
being a terrible role model for his
younger brother.
Carlos
lost his watch while he was running.
The past progressive can express incomplete action.
I was
sleeping on the couch when Bertie
smashed through the door.
(as opposed to the simple past, which suggests a completed action: I
slept on the couch last night.
The past progressive is also used to poke fun at or criticize an action that is sporadic but habitual in nature:
Tashonda
was always handing in late
papers.
My
father was always lecturing my brother.