helppppppppppppppppppppppppp(ghi đúng số thứ tự như đề bài ạ)

45. I haven't watched this movie for 6 months 

46. I have never been abroad 

47. The last time I went to the zoo was last year 

48. She has cried for two hours 

49. We have gone to this restaurant for a long time 

50. The last time I heard from her was many years ago 

51. John hasn't had his hair cut for six months 

52. This is the first time I have seen such a dirty dog 

53. It's the most beautiful building I have ever seen 

54. They have studied English since they were in grade 3 

55. She hasn't seen her parents for a long time 

* Lý thuyết : 

+ Công thức thì hiện tại hoàn thành : S + have / has + Ved / V3 

+ Công thức thì quá khứ đơn : S + Ved /V2 

+ Các dạng chuyển từ quá khứ đơn sang quá khứ hoàn thành : 

- The last time + S + Ved /V2 + tobe + mốc thời gian + ago 

- It is + khoảng thời gian since + S + Ved /V2 

=> S + have / has + Ved /V3 

- This is the first time + S + have / has + Ved /V3 = S + have / has never seen such ... before 

----------- Chúc bạn học tốt %_% ----------------

45 I haven't watched this movie for 6 months.

46 I have never been abroad.

47 The last time I went to the zoo was last year. 

48 She has cried for two hours.

- Started V-ing/to V-inf: Bắt đầu làm gì -> S + have/has + VpII + O.

- Began V-ing/to V-inf: Bắt đầu làm gì -> S + have/has + been + V-ing + O.

49 We have gone to this restaurant for a long time.

50 The last time I heard from her was many years ago.

51 John hasn't had his hair cut for six months.

- Bị động nhờ vả: Have/has sth VpII

52 This is the first time I have seen such a dirty dog. 

53 It's the most beautiful building I have ever seen.

54 They have studied English since they were in grade 3.

- HTHT since QKD: Kể từ khi.

55 She hasn't seen her parents for a long time.

- This is the first time + S + have/has + (ever) + VpII + O: Đây là lần đầu tiên ai đó làm gì.

- = S + have/has + (never) + VpII + O: Ai đó chưa làm gì bao giờ.

- The last time + S + V2/ed + O + was + time + ago: Lần cuối ai đó làm gì là vào khi nào.

- Since + mốc thời gian, for + quãng thời gian