Past continuous
We use this tense to:
-describe a scene in the past
-describe a sudden event that interrupted a longer one (with past simple)
- When he arrived, I was watching TV.
- describe an event that was in proggress at a specific moment in the past
- At 7.30 this morning, I was waiting for the bus.
Negative
We make negative form with TO BE in the past+NOT (wasn´t, weren´t) +BASE FORM with ING.
- I was not playing.
- You were not reading.
- She was not running.
Question
We make past continuous question, when we change the position of TO BE and BASE FORM+ING.
- Were we playing?
- Was she reading?
- Was I running?