mantener
to keep, to maintain, to support
Mantén la calma.
Keep calm.
mantener present indicative
Habitual and ongoing actions in the present.
mantener present continuous
Action in progress right now. Periphrastic: estar (present) + gerund.
mantener preterite
Completed actions at a specific moment in the past.
mantener imperfect
Habitual past actions, descriptions, background.
mantener present perfect
Completed actions with present relevance. Auxiliary haber + participle.
mantener future
Actions yet to happen.
mantener informal future
Near-future plans. Periphrastic: ir (present) + a + infinitive.
mantener future perfect
Action that will have been completed by a future moment. Auxiliary haber (future) + participle.
mantener conditional
Hypothetical or polite would-actions.
mantener conditional perfect
Hypothetical past: would have done. Auxiliary haber (conditional) + participle.
mantener pluperfect
An action completed before another past action.
mantener subjunctive present
Desires, doubts, and hypotheticals in the present.
mantener subjunctive imperfect
Past subjunctive: desires, doubts, hypotheticals in the past.
mantener subjunctive present perfect
Completed actions in subjunctive contexts.
mantener subjunctive pluperfect
Past-perfect actions in subjunctive contexts.
mantener imperative (affirmative)
Affirmative commands.
mantener imperative (negative)
Negative commands: borrows subjunctive present.