Ron was sleeping when he heard a loud noise.
What were you doing when I phoned you.
Jenny wasn't doing her homework when Nick arrived.
Maria and Paul were playing chess when their parents came home.
Sam and Kevin were visiting Barcelona's stadium when they saw Messi.
While I was cooking dinner for my parents my friend phoned me.
While I was looking out of the window my cat stole my food from the plate.
Where were the athletes running when you saw them.