I was studying for my exam all night last night.They were walking in the park when it started to rain.The children were playing outside while their parents were cooking dinner.We were watching a movie when the power went out.She was talking on the phone when her boss walked into the room.The dog was barking loudly while the fireworks were going off.I was driving to work when I saw a car accident on the highway.He was reading a book while waiting for his flight at the airport.