1. Alen hurt his leg white he was playingfootball.
2. By the time Ben arrived, I had finished all my homework.
3, During lunch , someone rang the bell
-> While I was having lunch, someone rang the bell.
4, The film stared at 8p.m .I got to the cinema at 8.15 p.m
-> When I got to the cinema at 8.15 p.m, the film had stared at 8p.m
5, I have studied English for five years
-> I began to study English five years ago.
6, The phone rang during the dinner
-> While I was having dinner, the phone rang.
7, Sue left the house , but the first she locked the doors
-> Before Sue left the house, she had locked the doors.
8, Alan was skilling in Switzerland and met his old friend
-> While Alan was skilling in Switzerland, he met his old friend.
10, He did all his homework and then went to bed
-> After he had done his homework, he went to bed.
11, Michael took a deep breath and then dived into the water
-> After Michael had taken a deep breath, he dived into the water
12, We missed the bus so we took a taxi
-> We took a taxi because we missed the bus.