I wasn't working when my teacher walked in the class: I was playing.
I saw a robber when I was waiting for a bus.
Taylor had long hair and a beard when he was young.
It started snowing while I was driving home.
What were you doing this time last year?
I didn't call you because I was having a meeting.
I was still sleeping when my mother left for work this morning.
Why did you bring your umbrella? Was it raining when you left home?
