Afirmative:
I was cleaning the house when the phone rang.
You were talking too loud.
July was trying to solve the excercise.
His sister was cooking at 3 o'clock.
Negative:
They weren't paying attention.
She wasn't searching for the lost keys.
You weren't riding your bicycle.
Jeremy wasn't doing his homework.
Interogative:
Were you trying to sleep?
Was Nicole sleeping when you came home?
Were them eating by the time you arrived?
Was he driving to work when you called him?