1) I was making a pudding when the light went out.
2) We suddenly realized that we were traveling in the wrong direction.
3) The boys were playing cards when they heard their father's step.
4) As I was in the park I stepped on a banana skin and fell heavily.
5) While we were watering the flowers it began to rain.
6)While Julian was repairing his motorbike, his father was reading a magazine.
7) My uncle was saving a lot of money to buy a new sports car two years ago.
8) Helen and Hector was spent a lot of money last Easter holidays.