Respuesta:
1. has eaten
2. have broken
3. has started
4. have not left
5. have written
6. have already finished
7. have lost
8. has not gone
9. has just phoned
10. have not seen
11. has never seen
12. have lived
13. has not arrived
14. Has he ever been
15. have bought
Explicación:
El Presente Perfecto Afirmativo. Se construye de la siguiente manera:
Sujeto + Have / Has + Verbo en Participio Pasado + Complemento.
El Presente Perfecto Negativo. Se construye de la siguiente manera:
Sujeto + Have / Has + Not + Verbo en Participio Pasado + Complemento.
