habrán tropezado
-they/you will have stumbled
Future perfectellos/ellas/ustedesconjugation oftropezar.

tropezar

También habrán tropezado con varias partituras y textos en los que se aclaraba su participación y el premio recibido en los concursos por él organizados.Fueron solamente nueve, siete en Buenos Aires y dos en Montevideo.
You may have as well found several pieces printed as sheetmusic and texts on which it was explained about his contribution and the award won at those contests.They were only nine, seven in Buenos Aires and two in Montevideo.
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to drizzle