Possible Results:
haya enloquecido
Present perfect subjunctive yo conjugation of enloquecer.
haya enloquecido
Present perfect subjunctive él/ella/usted conjugation of enloquecer.

enloquecer

No puedo creer que no haya habido indicios, que haya enloquecido de repente.
I just can't believe that there was no warning. That he just went off like that.
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frost