Suponer Conjugation | How to Conjugate Suponer in Spanish

Suponer means “to suppose,” “to assume,” or “to imply.” You will learn its supongo present form, supuse preterite family, supondr- future/conditional, suponga subjunctive, irregular participle supuesto, and commands.

Suponer conjugation at a glance

Verb type: Irregular. Suponer has the irregular participle supuesto. Its main conjugation families are supongo, preterite supus-, future/conditional supondr-, and subjunctive supong- / supusier-.

Suponer gerund, past participle, and infinitive

The infinitive names the verb, the gerund supports progressive constructions, and the past participle combines with haber — “to have” as an auxiliary — in compound forms. The participle supuesto remains invariant in those compounds.

Form	Spanish	Natural English guide
Infinitive	suponer	to suppose / assume / imply
Gerund	suponiendo	supposing / assuming / implying
Past participle	supuesto	supposed / assumed / implied

Suponer meaning and essential uses

Suponer is transitive and commonly means treating something as true on the basis of evidence or as a working assumption: Supongo que está en casa. — “I suppose / assume that he / she is at home.”

RAE also records “imply / entail”: El cambio supone más trabajo. — “The change implies / entails more work.” Another use is assigning assumed characteristics or location: Te suponía en Madrid. — “I thought / assumed you were in Madrid.”

Suponer irregular conjugation patterns

The present is regular except for first-person supongo — “I suppose.” The preterite uses supus-: supuse, supusiste, supuso, supusimos, supusisteis, supusieron.

Future and conditional use supondr-: supondré / supondría. Present subjunctive uses supong-, past/future subjunctive use supusier-, and every compound tense uses irregular participle supuesto.

Suponer indicative and periphrastic conjugations

Suponer present tense conjugation

Present indicative (el presente de indicativo) — Use it for current situations, habits, facts, and contextually near-future reference. The first-person singular is supongo; the remaining present forms use supon-.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	supongo	I suppose / assume / imply
Tú — you, singular informal	supones	you suppose / assume / imply
Él / Ella / Usted — he / she / you, singular formal	supone	he / she supposes / assumes / implies; you suppose / assume / imply (formal)
Nosotros / Nosotras — we	suponemos	we suppose / assume / imply
Vosotros / Vosotras — you, plural informal, mainly Spain	suponéis	you suppose / assume / imply (plural)
Ellos / Ellas / Ustedes — they / you, plural	suponen	they suppose / assume / imply; you suppose / assume / imply (plural)

• Supongo que llegará a tiempo. — I suppose that he / she will arrive on time.

Suponer preterite conjugation

Preterite (el pretérito perfecto simple / pretérito indefinido) — Use it for completed or bounded past events. The entire preterite uses the irregular supus- family.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	supuse	I supposed / assumed / implied
Tú — you, singular informal	supusiste	you supposed / assumed / implied
Él / Ella / Usted — he / she / you, singular formal	supuso	he / she supposed / assumed / implied; you supposed / assumed / implied (formal)
Nosotros / Nosotras — we	supusimos	we supposed / assumed / implied
Vosotros / Vosotras — you, plural informal, mainly Spain	supusisteis	you supposed / assumed / implied (plural)
Ellos / Ellas / Ustedes — they / you, plural	supusieron	they supposed / assumed / implied; you supposed / assumed / implied (plural)

• Ayer supuse que la reunión era a las nueve. — Yesterday I assumed the meeting was at nine.

Suponer imperfect conjugation

Imperfect (el pretérito imperfecto) — Use it for habitual, descriptive, background, or ongoing past situations. Compound forms use the irregular participle supuesto — “supposed / assumed / implied.”

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	suponía	I used to suppose / assume / imply / was supposing / assuming / implying
Tú — you, singular informal	suponías	you used to suppose / assume / imply / were supposing / assuming / implying
Él / Ella / Usted — he / she / you, singular formal	suponía	he / she used to suppose / assume / imply / was supposing / assuming / implying; you used to suppose / assume / imply / were supposing / assuming / implying (formal)
Nosotros / Nosotras — we	suponíamos	we used to suppose / assume / imply / were supposing / assuming / implying
Vosotros / Vosotras — you, plural informal, mainly Spain	suponíais	you used to suppose / assume / imply / were supposing / assuming / implying (plural)
Ellos / Ellas / Ustedes — they / you, plural	suponían	they used to suppose / assume / imply / were supposing / assuming / implying; you used to suppose / assume / imply / were supposing / assuming / implying (plural)

• Antes suponía que todo era más sencillo. — I used to assume everything was simpler.

Suponer present progressive

Present progressive — This verbal periphrasis focuses on an action or process in progress. Form it with present estar — “to be” — plus suponiendo — “supposing / assuming / implying.”

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	estoy suponiendo	I am supposing / assuming / implying
Tú — you, singular informal	estás suponiendo	you are supposing / assuming / implying
Él / Ella / Usted — he / she / you, singular formal	está suponiendo	he / she is supposing / assuming / implying; you are supposing / assuming / implying (formal)
Nosotros / Nosotras — we	estamos suponiendo	we are supposing / assuming / implying
Vosotros / Vosotras — you, plural informal, mainly Spain	estáis suponiendo	you are supposing / assuming / implying (plural)
Ellos / Ellas / Ustedes — they / you, plural	están suponiendo	they are supposing / assuming / implying; you are supposing / assuming / implying (plural)

• Estoy suponiendo demasiado sin comprobar los datos. — I am assuming too much without checking the data.

Suponer near future conjugation

Near future — This verbal periphrasis expresses an intention, plan, or expected event. Form it with present ir — “to go” — plus a — “to” — and suponer.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	voy a suponer	I am going to suppose / assume / imply
Tú — you, singular informal	vas a suponer	you are going to suppose / assume / imply
Él / Ella / Usted — he / she / you, singular formal	va a suponer	he / she is going to suppose / assume / imply; you are going to suppose / assume / imply (formal)
Nosotros / Nosotras — we	vamos a suponer	we are going to suppose / assume / imply
Vosotros / Vosotras — you, plural informal, mainly Spain	vais a suponer	you are going to suppose / assume / imply (plural)
Ellos / Ellas / Ustedes — they / you, plural	van a suponer	they are going to suppose / assume / imply; you are going to suppose / assume / imply (plural)

• Voy a suponer que todos están de acuerdo. — I am going to assume everyone agrees.

Suponer future tense conjugation

Simple future (el futuro simple) — Use it for future reference and, where useful, probability. The future uses the irregular stem supondr-.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	supondré	I will suppose / assume / imply
Tú — you, singular informal	supondrás	you will suppose / assume / imply
Él / Ella / Usted — he / she / you, singular formal	supondrá	he / she will suppose / assume / imply; you will suppose / assume / imply (formal)
Nosotros / Nosotras — we	supondremos	we will suppose / assume / imply
Vosotros / Vosotras — you, plural informal, mainly Spain	supondréis	you will suppose / assume / imply (plural)
Ellos / Ellas / Ustedes — they / you, plural	supondrán	they will suppose / assume / imply; you will suppose / assume / imply (plural)

• Supondremos que el valor es cero. — We will assume the value is zero.

Suponer conditional conjugation

Conditional (el condicional simple) — Use it for hypothetical outcomes, softened statements, or related conditional meanings. The conditional uses the irregular stem supondr-.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	supondría	I would suppose / assume / imply
Tú — you, singular informal	supondrías	you would suppose / assume / imply
Él / Ella / Usted — he / she / you, singular formal	supondría	he / she would suppose / assume / imply; you would suppose / assume / imply (formal)
Nosotros / Nosotras — we	supondríamos	we would suppose / assume / imply
Vosotros / Vosotras — you, plural informal, mainly Spain	supondríais	you would suppose / assume / imply (plural)
Ellos / Ellas / Ustedes — they / you, plural	supondrían	they would suppose / assume / imply; you would suppose / assume / imply (plural)

• Supondría un coste adicional. — It would imply an additional cost.

Suponer present perfect conjugation

Present perfect (el pretérito perfecto compuesto) — Use it for completed events connected to a present reference frame; regional distribution varies. Compound forms use the irregular participle supuesto — “supposed / assumed / implied.”

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	he supuesto	I have supposed / assumed / implied
Tú — you, singular informal	has supuesto	you have supposed / assumed / implied
Él / Ella / Usted — he / she / you, singular formal	ha supuesto	he / she has supposed / assumed / implied; you have supposed / assumed / implied (formal)
Nosotros / Nosotras — we	hemos supuesto	we have supposed / assumed / implied
Vosotros / Vosotras — you, plural informal, mainly Spain	habéis supuesto	you have supposed / assumed / implied (plural)
Ellos / Ellas / Ustedes — they / you, plural	han supuesto	they have supposed / assumed / implied; you have supposed / assumed / implied (plural)

• He supuesto que ya lo sabías. — I have assumed that you already knew.

Suponer past perfect conjugation

Past perfect (el pretérito pluscuamperfecto) — Use it for an event completed before another past reference point. Compound forms use the irregular participle supuesto — “supposed / assumed / implied.”

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	había supuesto	I had supposed / assumed / implied
Tú — you, singular informal	habías supuesto	you had supposed / assumed / implied
Él / Ella / Usted — he / she / you, singular formal	había supuesto	he / she had supposed / assumed / implied; you had supposed / assumed / implied (formal)
Nosotros / Nosotras — we	habíamos supuesto	we had supposed / assumed / implied
Vosotros / Vosotras — you, plural informal, mainly Spain	habíais supuesto	you had supposed / assumed / implied (plural)
Ellos / Ellas / Ustedes — they / you, plural	habían supuesto	they had supposed / assumed / implied; you had supposed / assumed / implied (plural)

• Ya habíamos supuesto ese resultado. — We had already assumed that result.

Suponer future perfect conjugation

Future perfect (el futuro perfecto) — Use it for an event expected to be completed before a future reference point. Compound forms use the irregular participle supuesto — “supposed / assumed / implied.”

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	habré supuesto	I will have supposed / assumed / implied
Tú — you, singular informal	habrás supuesto	you will have supposed / assumed / implied
Él / Ella / Usted — he / she / you, singular formal	habrá supuesto	he / she will have supposed / assumed / implied; you will have supposed / assumed / implied (formal)
Nosotros / Nosotras — we	habremos supuesto	we will have supposed / assumed / implied
Vosotros / Vosotras — you, plural informal, mainly Spain	habréis supuesto	you will have supposed / assumed / implied (plural)
Ellos / Ellas / Ustedes — they / you, plural	habrán supuesto	they will have supposed / assumed / implied; you will have supposed / assumed / implied (plural)

• Para entonces habrán supuesto varias cosas sin confirmarlas. — By then they will have assumed several things without confirming them.

Suponer conditional perfect conjugation

Conditional perfect (el condicional compuesto) — Use it for a hypothetical completed outcome. Compound forms use the irregular participle supuesto — “supposed / assumed / implied.”

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	habría supuesto	I would have supposed / assumed / implied
Tú — you, singular informal	habrías supuesto	you would have supposed / assumed / implied
Él / Ella / Usted — he / she / you, singular formal	habría supuesto	he / she would have supposed / assumed / implied; you would have supposed / assumed / implied (formal)
Nosotros / Nosotras — we	habríamos supuesto	we would have supposed / assumed / implied
Vosotros / Vosotras — you, plural informal, mainly Spain	habríais supuesto	you would have supposed / assumed / implied (plural)
Ellos / Ellas / Ustedes — they / you, plural	habrían supuesto	they would have supposed / assumed / implied; you would have supposed / assumed / implied (plural)

• Habría supuesto lo mismo en tu situación. — I would have assumed the same in your situation.

Suponer subjunctive conjugations

Suponer present subjunctive conjugation

Present subjunctive (el presente de subjuntivo) — Use it in subordinate environments involving wishes, influence, emotion, doubt or denial, evaluation, necessity, possibility, or non-specific reference. The present subjunctive uses the supong- family.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	suponga	that I suppose / assume / imply
Tú — you, singular informal	supongas	that you suppose / assume / imply
Él / Ella / Usted — he / she / you, singular formal	suponga	that he / she suppose / assume / imply; that you suppose / assume / imply (formal)
Nosotros / Nosotras — we	supongamos	that we suppose / assume / imply
Vosotros / Vosotras — you, plural informal, mainly Spain	supongáis	that you suppose / assume / imply (plural)
Ellos / Ellas / Ustedes — they / you, plural	supongan	that they suppose / assume / imply; that you suppose / assume / imply (plural)

• Quiero que supongas que no conocemos el resultado. — I want you to suppose that we do not know the result.

Suponer imperfect subjunctive conjugation

Imperfect subjunctive (el imperfecto de subjuntivo) — The main table uses the -ra series. The accepted -se series is also valid in many contexts and is demonstrated after the table. These forms use the supusier- family; the main table shows the -ra series.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	supusiera	that I supposed / assumed / implied
Tú — you, singular informal	supusieras	that you supposed / assumed / implied
Él / Ella / Usted — he / she / you, singular formal	supusiera	that he / she supposed / assumed / implied; that you supposed / assumed / implied (formal)
Nosotros / Nosotras — we	supusiéramos	that we supposed / assumed / implied
Vosotros / Vosotras — you, plural informal, mainly Spain	supusierais	that you supposed / assumed / implied (plural)
Ellos / Ellas / Ustedes — they / you, plural	supusieran	that they supposed / assumed / implied; that you supposed / assumed / implied (plural)

• Preferían que supusiéramos un escenario más conservador. — They preferred that we assume a more conservative scenario.
• Era razonable que supusieses que llegaría tarde. — It was reasonable that you assumed he / she would arrive late.

Suponer future subjunctive conjugation

Future subjunctive (el futuro de subjuntivo) — Rare in modern everyday Spanish. It survives mainly in formal, legal, proverbial, literary, or historical contexts. These rare forms use the supusier- family.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	supusiere	if / when I should suppose / assume / imply
Tú — you, singular informal	supusieres	if / when you should suppose / assume / imply
Él / Ella / Usted — he / she / you, singular formal	supusiere	if / when he / she should suppose / assume / imply; if / when you should suppose / assume / imply (formal)
Nosotros / Nosotras — we	supusiéremos	if / when we should suppose / assume / imply
Vosotros / Vosotras — you, plural informal, mainly Spain	supusiereis	if / when you should suppose / assume / imply (plural)
Ellos / Ellas / Ustedes — they / you, plural	supusieren	if / when they should suppose / assume / imply; if / when you should suppose / assume / imply (plural)

• Quien supusiere hechos no demostrados deberá indicarlo expresamente. — Whoever should assume unproven facts must state it explicitly.

Suponer present perfect subjunctive conjugation

Present perfect subjunctive (el pretérito perfecto de subjuntivo) — Use it when a completed event appears inside a present- or future-oriented subjunctive environment. Compound forms use the irregular participle supuesto — “supposed / assumed / implied.”

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	haya supuesto	that I have supposed / assumed / implied
Tú — you, singular informal	hayas supuesto	that you have supposed / assumed / implied
Él / Ella / Usted — he / she / you, singular formal	haya supuesto	that he / she has supposed / assumed / implied; that you have supposed / assumed / implied (formal)
Nosotros / Nosotras — we	hayamos supuesto	that we have supposed / assumed / implied
Vosotros / Vosotras — you, plural informal, mainly Spain	hayáis supuesto	that you have supposed / assumed / implied (plural)
Ellos / Ellas / Ustedes — they / you, plural	hayan supuesto	that they have supposed / assumed / implied; that you have supposed / assumed / implied (plural)

• Me alegra que no hayas supuesto nada sin preguntar. — I am glad that you did not assume anything without asking.

Suponer past perfect subjunctive conjugation

Past perfect subjunctive (el pluscuamperfecto de subjuntivo) — The main table uses hubiera; hubiese is an accepted auxiliary alternative in many contexts and is demonstrated after the table. Compound forms use the irregular participle supuesto — “supposed / assumed / implied.”

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	hubiera supuesto	that I had supposed / assumed / implied
Tú — you, singular informal	hubieras supuesto	that you had supposed / assumed / implied
Él / Ella / Usted — he / she / you, singular formal	hubiera supuesto	that he / she had supposed / assumed / implied; that you had supposed / assumed / implied (formal)
Nosotros / Nosotras — we	hubiéramos supuesto	that we had supposed / assumed / implied
Vosotros / Vosotras — you, plural informal, mainly Spain	hubierais supuesto	that you had supposed / assumed / implied (plural)
Ellos / Ellas / Ustedes — they / you, plural	hubieran supuesto	that they had supposed / assumed / implied; that you had supposed / assumed / implied (plural)

• Si hubiera supuesto otra cosa, habría tomado otra decisión. — If I had assumed something else, I would have made another decision.
• Si hubieses supuesto que era gratuito, te habrías equivocado. — If you had assumed it was free, you would have been mistaken.

Suponer future perfect subjunctive conjugation

Future perfect subjunctive (el futuro perfecto de subjuntivo) — Rare in modern everyday Spanish. Treat it as a formal or historical reference form, not an everyday conversational target. Compound forms use the irregular participle supuesto — “supposed / assumed / implied.”

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	hubiere supuesto	if / when I should have supposed / assumed / implied
Tú — you, singular informal	hubieres supuesto	if / when you should have supposed / assumed / implied
Él / Ella / Usted — he / she / you, singular formal	hubiere supuesto	if / when he / she should have supposed / assumed / implied; if / when you should have supposed / assumed / implied (formal)
Nosotros / Nosotras — we	hubiéremos supuesto	if / when we should have supposed / assumed / implied
Vosotros / Vosotras — you, plural informal, mainly Spain	hubiereis supuesto	if / when you should have supposed / assumed / implied (plural)
Ellos / Ellas / Ustedes — they / you, plural	hubieren supuesto	if / when they should have supposed / assumed / implied; if / when you should have supposed / assumed / implied (plural)

• Si hubieren supuesto condiciones adicionales, deberán declararlas. — If they should have assumed additional conditions, they must declare them.

Suponer imperative and commands

Commands address another person directly. The nosotros/nosotras row is a present-subjunctive form used with exhortative “let’s…” value.

Suponer affirmative commands

Use the verified affirmative command forms for direct instructions when the target meaning supports them naturally.

Pronoun and English meaning	Spanish	Natural English guide
Tú — you, singular informal	supón	suppose
Usted — you, singular formal	suponga	suppose (formal)
Nosotros / Nosotras — we; let’s…	supongamos	let’s suppose
Vosotros / Vosotras — you, plural informal, mainly Spain	suponed	suppose (plural, mainly Spain)
Ustedes — you, plural	supongan	suppose (plural)

• Supón que el tren llega tarde. — Suppose the train arrives late.

Suponer negative commands

Negative commands use subjunctive-based forms, with no — “not / do not” — before the verb.

Pronoun and English meaning	Spanish	Natural English guide
Tú — you, singular informal	no supongas	do not suppose
Usted — you, singular formal	no suponga	do not suppose (formal)
Nosotros / Nosotras — we; let’s…	no supongamos	let’s not suppose
Vosotros / Vosotras — you, plural informal, mainly Spain	no supongáis	do not suppose (plural, mainly Spain)
Ustedes — you, plural	no supongan	do not suppose (plural)

• No supongas que todos piensan igual. — Do not assume everyone thinks the same.

Common constructions with Suponer

These patterns show sentence frames that materially affect how the target verb is used.

• suponer que + clause. — to suppose / assume that something is the case.
• suponer + noun. — to imply / entail / represent something.
• suponer a alguien + location or quality. — to assume someone is in a place or has a quality.

Example sentences with Suponer

These examples reinforce the target verb across useful forms and contexts already taught in the lesson.

• Supongo que tienes razón. — I suppose you are right.
• ¿Qué supone este cambio para nosotros? — What does this change imply for us?
• No debemos suponer nada sin pruebas. — We should not assume anything without evidence.
• Espero que no supongas que estoy de acuerdo. — I hope you do not assume that I agree.
• Habíamos supuesto que sería más barato. — We had assumed it would be cheaper.
• Supón que mañana llueve. — Suppose it rains tomorrow.

Regional and usage notes for Suponer

The core tables retain tú, usted, vosotros/vosotras, and ustedes for project comparability. Voseo changes some second-person singular forms in regions where vos — “you, singular informal” — is used.

• Vos suponés que todo va a salir bien. — You suppose everything will turn out well. (voseo)
• Suponé que el resultado es correcto. — Suppose the result is correct. (affirmative vos command)

For suponer, keep its irregular families distinct: supongo, supus-, supondr-, supong-, supusier-, and the irregular participle supuesto.