faltar
to be lacking, to lack, to not have
Falta una silla en la mesa.
There's a chair missing at the table.
faltar present indicative
Habitual and ongoing actions in the present.
faltar present continuous
Action in progress right now. Periphrastic: estar (present) + gerund.
faltar preterite
Completed actions at a specific moment in the past.
faltar imperfect
Habitual past actions, descriptions, background.
faltar present perfect
Completed actions with present relevance. Auxiliary haber + participle.
faltar future
Actions yet to happen.
faltar informal future
Near-future plans. Periphrastic: ir (present) + a + infinitive.
faltar future perfect
Action that will have been completed by a future moment. Auxiliary haber (future) + participle.
faltar conditional
Hypothetical or polite would-actions.
faltar conditional perfect
Hypothetical past: would have done. Auxiliary haber (conditional) + participle.
faltar pluperfect
An action completed before another past action.
faltar subjunctive present
Desires, doubts, and hypotheticals in the present.
faltar subjunctive imperfect
Past subjunctive: desires, doubts, hypotheticals in the past.
faltar subjunctive present perfect
Completed actions in subjunctive contexts.
faltar subjunctive pluperfect
Past-perfect actions in subjunctive contexts.
faltar imperative (affirmative)
Affirmative commands.
faltar imperative (negative)
Negative commands: borrows subjunctive present.