Put the verbs in brackets into correct forms of present perfect tense.

1. Have you visited

2. haven't signed

3. has never spoken

4. have just finished

5. have already gone

6. haven't bought

7. Have you washed

8. Have you checked

9. Have you ever touched

10. has drunk

11. has danced

12. have you studied - have studied

13. has drunk

14. have dug

15. have talked

16. has broken

17. has improved

18. have walked

19. has written

20. has driven 

Thì hiện tại hoàn thành:

- Cấu trúc: 
+ Khẳng định: S + has/have + V3 + O.
+ Phủ định: S + has/have + not + V3 + O.
+ Nghi vấn: Has/Have + S + V3 + O?

- Dấu hiệu nhận biết:
+ just = recently = lately: gần đây, vừa mới
+ already: rồi
+ before: trước đây
+ ever: đã từng
+ never: chưa từng, không bao giờ
+ yet: chưa
+ for + khoảng thời gian: trong khoảng 
+ since + mốc thời gian: từ khi 
+ so far = until now = up to now = up to the present: cho đến bây giờ
+ in/for/during/over + the past/last + thời gian: trong …. qua 

- Chúc cậu học tốt.