eu acontecera

had happened, happens

ɐ k õ t ɨ s e ɾ ɐ → acontecer
acontec to happen, to occur + era pluperfect
verb · first singular · pluperfect indicative Rare #41,459
had happened Literary/formal; this is the simple pluperfect (mais-que-perfeito simples). In everyday speech, Portuguese usually uses “tinha acontecido”.
PO: Quando eu cheguei, isso já acontecera.
EN: When I arrived, that had already happened.
happens Can also be the future subjunctive form, often used after words like “se” (if) or “quando” (when): “se/quando isso acontecera” ≈ “if/when that happens”.
PO: Se isso acontecera, ligue para mim.
EN: If that happens, call me.
Conjugation of acontecer
Indicative pluperfect
SingularPlural
First acontecera —
Third acontecera aconteceram

Uma vez morto o espírito da floresta, não sabemos o que acontecera.

Once the spirit of the forest is dead, we don't know what will happen.

— Princesa Mononoke (1997)

Tom contou à polícia o que acontecera.

Tom told the police what had happened.

Nós nos preocupamos se acontecera alguma coisa.

We were worried something might happen.

Tudo acontecera tão rápido.

Everything happened so fast.