hubieran advertido
-they/you had warned
Past perfect subjunctiveellos/ellas/ustedesconjugation ofadvertir.

advertir

Si ellos no hubieran advertido entonces Mayo hubiera sido un mes como ningún otro sobre la faz de la tierra hasta este momento.
If they had not warned then May would have been a month like none other on the face of this earth thus far.
Si las previsiones hubieran advertido de posibilidades de inundación, se hubieran podido tomar medidas preventivas.
If the lake was likely to flood, preventive measures could be taken.
Word of the Day
to cluck