alterar to alter, change, disturb, upsetFuture Perfect Subjunctive / Futuro Perfecto de Subjuntivoyohubiere alteradotúhubieres alteradoél / Ud.hubiere alteradonosotroshubiéremos alteradovosotroshubiereis alteradoellos / Uds.hubieren 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