`46.` It is hours since Mary last rang.

`47.` Alan hasn't visited his parents for ages.

`48.` It is over six months since John last had his hair cut.

`49.` The last time I went to HCM City was 2 years ago.

`50.` The last time she wrote to us was last year.

`51.` It's 8 years since she learned Englih.

`52.` It's ages since he last laughed so much.

`53`. It's years since I last enjoyed myself so much.

`54.` It's hours since the telephone last rang.

`55.` It's ages since I last saw him.

`56.` Ly's father has stopped smoking since last year.

`57.` The editor last wrote to Mai a month ago.

-------------------

`-` S + have/has + not + V3/V-ed + for+ khoảng thời gian/since + mốc thời gian

`=`  S + last + V2/V-ed +O + khoảng thời gian+ ago/ +when + S+V2/ed+O

`=` The last time + S+ V2/V-ed +O +  was + mốc thời gian/ + when + S+V2/V-ed+O

`=` It is / has been +khoảng thời gian+ since + S+ (last) + V2/V-ed +O

`-` stop + V-ing: dừng làm gì đó  

Các công thức đổi HTHT - QKĐ

Structure 1: 

S + has/have + not + V3/ed + for/since + time 

--> S + last + V2/ed 

--> The last time + S+ V2/ed + was + time 

--> It is / has been + time + since + S+ (last) + V2/ed 

Structure 2: 

S + has/have + V3/ed + for/since + time 

--> S + started / began + to V / Ving 

--> It is / has been + time + since + S+ V2/ed 

------------------------------------------------------------------

46. It is hours since Mary last rang.

47. Alan hasn't visited his parents for ages.

48. It is over six months since John last had his hair cut.

49. The last time I went to HCM City was 2 years ago.

50. The last time she wrote to us was last year.

51. It's 8 years since she learned E.

52. It's ages since he last laughed so much.

53. It's years since I last enjoyed myself so much.

54. It's hours since the telephone last rang.

55. It's ages since I last saw him.

56. Ly's father has stopped smoking since last year.

57. The editor last wrote to Mai a month ago.

`color{orange}{~MiaMB~}`