concentrar to concentratePresent Perfect Tense / Perfecto de Indicativoyohe concentradotúhas concentradoél / Ud.ha concentradonosotroshemos concentradovosotroshabéis concentradoellos / Uds.han concentrado
Other Tenses / Moods of Concentrar Simple Tenses Present Tense Imperfect Tense Preterite (Past Tense) Future Tense Conditional Tense Subjunctive Tense Imperfect Subjunctive Future Subjunctive Imperative (Command) Past Participle & Gerund Compound Tenses Present Perfect Past Perfect Past Anterior (Preterite Perfect) Future Perfect Conditional Perfect Present Perfect Subjunctive Pluperfect Subjunctive Future Perfect Subjunctive