Acabar de and recién both mean just. So what's the difference?
Acabar de is always followed by an infinitive. But don’t be fooled! This infinitive usually corresponds to an ‑ed past verb in English!
Acabo de terminar mi tarea.
I just finished my homework.
Meanwhile, recién is always followed by a preterite.
Recién terminé mi tarea.
I just finished my homework.
Acabar de is fairly common in Spain, but you’re more likely to hear recién in Latin America.