alterar to alter, change, disturb, upsetPresent Perfect Tense / Perfecto de Indicativoyohe alteradotúhas alteradoél / Ud.ha alteradonosotroshemos alteradovosotroshabéis alteradoellos / Uds.han alterado
Other Tenses / Moods of Alterar 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