Remember:
I was remembering.
I wasn't remembering.
Was I remembering?
Forget
He was forgetting what happened.
He wasn't forgetting what happened.
Was he forgetting what happened?
Shine:
Sun was shining
Sun wasn't shining.
Was the sun shining?
Turn:
I was turning off the tv.
I wasn't turning off the tv.
Was I turning off the tv?