hubieran alzado
-they/you had lifted
Antecopréterito de subjuntivo para el sujeto ellos/ellas/ustedes del verbo alzar.

alzar

Si solo hubieran alzado la mirada, hubieran visto lo que ahora ustedes ven.
If only they had raised their eyes, they would have seen what you see now.
Palabra del día
la leña