41. Jane left an hour ago and hasn't come back yet
42. Brenda has called you four times already
43. He was watching TV when she got home
44. While Eve was driving, John was sleeping
45. Jenny has never failed an English exam
46. Celia gave me a beautiful ring as a present
47. Tong hasn't been to England since 1997
48. He went to bed late last night so he was late for school this morning.
49. Did you go to Sally's party last night
50. As Jack was locking the door the phone rang