1. I was doing my homework when my sister came into the room.
2. John and his sister were walking to school when the accident happened.
3. I was talking about Kiki when she was phoning me.
4. While Anna was tidying up her room, she found her watch.
5. While Alison was studying, she remembered it was her mum's birthday.
6. When we found out about the accident, we were watching TV.
