Simon wasn't entering the house when the phone rang.
Was Simon entering the house when the phone rang?
He wasn't watering the flowers when the storm came.
Was he watering the flowers when the storm came?
We weren't riding our bikes while they walking the dog in park.
Were we riding our bikes while they walking the dog in park?
The moon wasn't lighting up the forest with it's brightness and the stars were blinking at the people below.
Was the moon lighting up the forest with it's brightness and the stars were blinking at the people below?