1.Were you sleeping when I called? You sounded drowsy.
2.An hour ago I was watching TV.
3.When she came, we were playing football.
4.I was driving at 16:00 yesterday.
5.When Winston came home, Karen was sleeping.
6.I was drinking beer, when my wife called.
7.While John was laughing, Mary was crying.
8.At the time of our arrival the city was going through a period of rapid expansion.
9.John was working at nine o’clock yesterday morning.
10.It was raining at noon.