Rule reminder
Tense agreement (consecutio temporum) in concessive clauses: Main clause present/future → subordinate: present subjunctive (sebbene faccia) or present perfect subjunctive (sebbene abbia fatto). Main clause past → subordinate: imperfect subjunctive (sebbene facesse) or past perfect subjunctive (sebbene avesse fatto).
Nonostante _____ (perdere) tutte le sue fortune, rimane ottimista.