eles acabarem

finish

→ acabar
acab finish; end + arem 3rd-person plural future subjunctive
verb · third plural · future subjunctive Rare #34,325
finish Personal infinitive form (refers to “they”); often used after expressions like “é melhor” or “para” to indicate who will do the action.
PO: É melhor eles acabarem cedo.
EN: It’s better for them to finish early.
Conjugation of acabar
Subjunctive future
SingularPlural
First acabar —
Third acabar acabarem

Até acabarem a beleza, a juventude e o dinheiro dele?

Until his good looks, youth, and money run out?

— देवदास (2002)

Queimem esta carta quando acabarem de ler.

Burn this letter when you've finished reading it.

Queimem esta carta quando acabarem de lê-la.

Burn this letter when you've finished reading it.

Isso é ruim, desligue tudo antes das baterias acabarem.

That's bad, turn everything off before the batteries run out.

— Salyut 7 (2017)

Quando os animais da floresta acabarem, para onde vão virar as suas armas?

When the forest animals are gone, where will they turn their weapons?

— Lagaan: A Coragem de um Povo (2001)