5. I haven't met him since we left university. 

6. How long have you bought your car?

7. This is the first time Peter has forgotten my birthday.

8. The PM hasn't gone abroad since 2020.  
9. Has he ever seen a ghost film? 

10. We haven't crossed such a long bridge before. 
``
``
- Dựa vào nghĩa từng câu + cấu trúc thì HTHT.
``
`@`Thì hiện tại hoàn thành:
- DHNB: since + mốc thời gian, for + khoảng thời gian, ever, never, yet,...
- (+) S + have/has + V3/ed
- (-) S + haven't/hasn't + V3/ed
- (?) Have/Has + S + V3/ed?

* Chuyển sang thì hiện tại hoàn thành: $\\$

5. I haven't met him since we left university. $\\$

6. How long have you bought your car?$\\$

7. This is the first time Peter has forgotten my birthday.$\\$

8. The PM hasn't gone abroad since 2020.  $\\$

9. Has he ever seen a ghost film? $\\$

10. We haven't crossed such a long bridge before. $\\$

$\\$$\\$$\\$

* Dấu hiệu nhận biết thì hiện tại hoàn thành: $\\$

for + khoảng thời gian, since + mốc thời gian, before, yet, already, never, ever,...$\\$$\\$

* Cấu trúc thì hiện tại hoàn thành: $\\$

(+) S + have/has + V3/ed

(-) S + haven't/hasn't + V3/ed

(?)

Have/Has + S + V3/ed + (O)?

(Wh - question) wf + have/has + S +V3?