dudar
to doubt
Dudo que llegue a tiempo.
I doubt he'll arrive on time.
dudar present indicative
Habitual and ongoing actions in the present.
dudar present continuous
Action in progress right now. Periphrastic: estar (present) + gerund.
dudar preterite
Completed actions at a specific moment in the past.
dudar imperfect
Habitual past actions, descriptions, background.
dudar present perfect
Completed actions with present relevance. Auxiliary haber + participle.
dudar future
Actions yet to happen.
dudar informal future
Near-future plans. Periphrastic: ir (present) + a + infinitive.
dudar future perfect
Action that will have been completed by a future moment. Auxiliary haber (future) + participle.
dudar conditional
Hypothetical or polite would-actions.
dudar conditional perfect
Hypothetical past: would have done. Auxiliary haber (conditional) + participle.
dudar pluperfect
An action completed before another past action.
dudar subjunctive present
Desires, doubts, and hypotheticals in the present.
dudar subjunctive imperfect
Past subjunctive: desires, doubts, hypotheticals in the past.
dudar subjunctive present perfect
Completed actions in subjunctive contexts.
dudar subjunctive pluperfect
Past-perfect actions in subjunctive contexts.
dudar imperative (affirmative)
Affirmative commands.
dudar imperative (negative)
Negative commands: borrows subjunctive present.