Помогите пожалуста, срочно

Ответ: Subject + have/has+ past participle or V3

Объяснение:

1. Has begun

2. Have come

3. Have visited

4. Has sold

5. Has learnt

6. Have not met

7. Has sent

8. Have understood

9.has been

10. Has opened

11. Has bought

12. Have you seen

13. Has written

14. Has kept

15. Have switched

16. Have flown

17. Has not finished

18. Have won

19. Have not tasted

20. Has felt