1. My car broke down when I was driving home from work.
2. Alan was looking out of the window when he saw a UFO.
3. When he was seeing me, he fell off the wall.
4.We were trying to log on when the Wifi stopped working.
5. Was Jim smoking when he turned on the gas?
6.She was so tired that she slept for twelve hours.
7.The tortoise was running while the hare was having a nap.
8.I phoned you four times last night but you were sleeping.
9.The police had asked (ask) them lots of questions before they released them.
10.While the children were surfing the Internet,they found a really interesting website about music.