1)I was reading while my brother was sleeping.
2)My friend was riding his bike while I was doing my homework.
3)They were watching television while their mother was cooking.
4)We were playing hockey while our teacher was talking by phone.
5)She was having lunch while her husband was washing.
6)You were listening to music while I was drinking tea.
7)He was going to the shops while his mother was working.
8)She was dancing while they were singing.