mantener to maintain, to keepFuture Perfect Subjunctive / Futuro Perfecto de Subjuntivoyohubiere mantenidotúhubieres mantenidoél / Ud.hubiere mantenidonosotroshubiéremos mantenidovosotroshubiereis mantenidoellos / Uds.hubieren mantenido
Other Tenses / Moods of Mantener 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