1) What were you doing when the phone rang?
2) Jane was studying when I came to see her.
3) The letter came while I was having lunch.
4) Margaret did not go to work yesterday because she was ill.
5) How fast were you driving when the police stopped you?
1) Helen returned from the cinema at 6 p.m.
2) I had finished my homework by eight o’clock.
3) He thought that he had lost the money.
4) Ann told me that she had seen an interesting film.
5) When I came home, mother had not cooked dinner yet.
6) When father returned from work, we had already done our homework.
7) Kate gave me the book which she had bought the day before.
8) Nick showed the teacher the picture which he had drawn.
9) The boy gave the goats the grass which he had brought from the field.
10) When we came to the station, the train had not left yet.