Perfect Subjunctive

Use hagi, hagis, hagi, hàgim, hàgiu or hagin plus the participle to express an action completed before the relevant present or future viewpoint. Celebro que hagis vingut evaluates an arrival that has already happened.

Mood still comes from the construction: evaluation, doubt, a prospective deadline or another subjunctive environment. The compound form itself does not imply doubt; it marks prior completion inside that environment.

In a future temporal clause, quan hagis acabat means once you have finished, even though the finishing is still future now. Contrast it with quan acabis, which simply presents the future event, and with haguessis acabat, viewed from a past or remote frame.