Suponer Conjugation: All Spanish Tenses

Suponer (to suppose, to assume; to involve, to mean) is an irregular verb built on poner and is conjugated on the same pattern: it adds -g- in the first-person present and throughout the subjunctive (supongo, suponga), takes the strong stem sup- in the preterite (supuse), forms the future and conditional on -pondr- (supondré, supondría), and has the irregular participle supuesto.

Indicative Tenses of Suponer

Suponer in the Present (Presente)

Assumptions and things we take to be true: Supongo que ya lo sabes (I suppose you already know).

Present tense rules →

Suponer in the Preterite (Pretérito indefinido)

Completed actions at a specific moment in the past: Supuse que no vendrías (I assumed you wouldn't come).

Preterite rules →

Suponer in the Present Perfect (Pretérito perfecto)

Past connected to the present: Siempre he supuesto lo mejor de ti (I have always assumed the best of you).

Present perfect rules →

Suponer in the Imperfect (Pretérito imperfecto)

Habitual or ongoing actions in the past: Suponía que el viaje sería más corto (I assumed the trip would be shorter).

Imperfect rules →

Suponer in the Past Perfect (Pluscuamperfecto)

An action before another past action: Cuando lo confirmaron, ya lo había supuesto (When they confirmed it, I had already assumed it).

Past perfect rules →

Suponer in the Future (Futuro simple)

Plans and predictions: Supondré que todo va bien hasta que me digan lo contrario (I'll assume all is well until told otherwise).

Future tense rules →

Suponer in the Future Perfect (Futuro perfecto)

An action that will be completed in the future: Para entonces ya habré supuesto el resultado (By then I will have assumed the result).

Future perfect rules →

Suponer in the Conditional (Condicional simple)

Advice and hypothetical situations: Yo supondría que es un malentendido (I would assume it's a misunderstanding).

Conditional rules →

Suponer in the Conditional Perfect (Condicional compuesto)

Hypotheses about the past: Habría supuesto otra cosa de no ser por la carta (I would have assumed otherwise but for the letter).

Conditional perfect rules →

Subjunctive Tenses of Suponer

Present Subjunctive of Suponer (Presente de subjuntivo)

Wishes, doubts and emotions: No creo que eso suponga un problema (I don't think that poses a problem).

Present subjunctive rules →

Present Perfect Subjunctive of Suponer (Pretérito perfecto de subjuntivo)

Evaluating a recent past action: Espero que no hayas supuesto lo peor (I hope you haven't assumed the worst).

Perfect subjunctive rules →

Imperfect Subjunctive of Suponer (Pretérito imperfecto de subjuntivo)

Hypothetical conditions: Si supusiera que es verdad, actuaría distinto (If I assumed it were true, I would act differently).

Imperfect subjunctive rules →

Past Perfect Subjunctive of Suponer (Pluscuamperfecto de subjuntivo)

Unreal hypotheses about the past: Si hubiera supuesto eso, no habría dicho nada (Had I assumed that, I would have said nothing).

Past perfect subjunctive rules →

Imperative of Suponer

Affirmative Commands of Suponer (Imperativo afirmativo)

Orders and requests: Supón por un momento que tienes razón (Suppose for a moment that you're right).

Affirmative commands rules →

Negative Commands of Suponer (Imperativo negativo)

Prohibitions and negative advice: No supongas lo que no sabes (Don't assume what you don't know).

Negative commands rules →

Expressions with Suponer

• Suponer un problema - to pose / amount to a problem
• Es de suponer que… - it's reasonable to assume that, presumably
• Suponer un esfuerzo - to involve / require an effort
• Dar por supuesto - to take for granted
• Suponiendo que… - supposing that, assuming that