48.I haven't really enjoyed myself since your birthday party.
49. My father hasn't seen his brother for nearly 20 years.
50. How long has it been since you learnt to drive?
51. I haven't gone swimming since we were in Spain.
52. It's weeks since you tidied your room.
53. We have looked for a flat for 2 months.
54. I haven't been to a night club before.
55. This is the first time they have heard such a thing.
56. This is the first time everyone has challenged his authority.
57. It is 2 years since she left university.
58. I have never known such a more warm-hearted person than my mother.
59. It is over a year since I was able to see them.
#Trang_Huyen
