hubieron adoptado
-they/you had adopted
Antepréterito para el sujeto ellos/ellas/ustedes del verbo adoptar.

adoptar

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Aconsejaba su uso hasta imponerlo como penitencia para aquellos que no hubieron adoptado esta buena costumbre.
He counseled its use and even imposed it as a penance on those who had not adopted this good habit.
Palabra del día
la lápida