Bài tập viết lại câu thì hiện tại hoàn thành và quá khứ đơn

51. I haven't gone swimming when we were in Spain.

52. It's weeks since you tidied this room.

53. We have looked for a flat fot 2 months and we are still looking.

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 someone has challenged his authority.

57. It's 2 years since she left university.

58. I have never known a more warm-hearted person than my mother.

59. It is over a year since I last saw them.

60. It has started to rain for 2 hours.

* Cấu trúc: S + haven't/hasn't + Vpp + for/since + time. 

              = S + last + Ved ... time + ago

              = The last time S +Ved + was + time + ago

              = It is + time + since + S + last + Ved

Chúc em học tốt. Xin 5 sao và CTLHN.