Suponer Conjugation: Make Assumptions in Spanish

By SpanishGram

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What is Suponer? The Verb for Assumptions and Hypotheses

Mastering the Spanish verb suponer is key to expressing assumptions, hypotheses, and suppositions. This versatile verb helps you talk about what you presume to be true or what would happen in hypothetical situations.

Key Takeaways:

  • Primary Meaning: To suppose, to assume, to guess.
  • Key Use: Expressing assumptions, hypotheses, and implications.
  • Must-Know Conjugation: Supongo que... (I suppose that…).
  • Grammar Tip: The stem changes from o to ue in most present tense forms (e.g., supongo, supones).
  • Common Structure: Suponer que (to assume that), Suponer + inf. (to assume doing something).

Complete Suponer Conjugation: The Essential Tenses

Present Tense Conjugation

PronounConjugationExample
YosupongoSupongo que tienes razĂłn. (I suppose you’re right.)
TĂşsuponesÂżQuĂ© supones que pasará? (What do you suppose will happen?)
Él/Ella/UstedsuponeElla supone que llegaremos tarde. (She assumes we’ll arrive late.)
NosotrossuponemosSuponemos que sabes la respuesta. (We assume you know the answer.)
VosotrossuponĂ©isSuponĂ©is demasiado de los demás. (You assume too much about others.)
Ellos/UstedessuponenEllos suponen que el trabajo estará listo. (They assume the work will be ready.)

Past Tenses: Preterite vs. Imperfect

Preterite Tense Conjugation

PronounConjugationExample
YosupuseSupuse que no vendrĂ­as. (I assumed you wouldn’t come.)
TĂşsupusisteSupusiste mal las intenciones de MarĂ­a. (You assumed Maria’s intentions wrong.)
Él/Ella/UstedsupusoÉl supuso que era fácil. (He assumed it was easy.)
NosotrossupusimosSupusimos que estarĂ­as de acuerdo. (We assumed you would agree.)
VosotrossupusisteisSupusisteis que ganarĂ­amos. (You all assumed we would win.)
Ellos/UstedessupusieronSupusieron que no importaba. (They assumed it didn’t matter.)

Imperfect Tense Conjugation

PronounConjugationExample
YosuponĂ­aSiempre suponĂ­a lo peor. (I always assumed the worst.)
TĂşsuponĂ­asDe pequeño, suponĂ­as que los adultos lo sabĂ­an todo. (As a child, you assumed adults knew everything.)
Él/Ella/UstedsuponĂ­aElla suponĂ­a que yo entenderĂ­a. (She assumed I would understand.)
NosotrossupĂłnĂ­amosSupĂłnĂ­amos que lloverĂ­a en abril. (We assumed it would rain in April.)
VosotrossuponĂ­aisSupĂłnĂ­ais que os ayudarĂ­amos. (You all assumed we would help you.)
Ellos/UstedessuponĂ­anSupĂłnĂ­an que el precio bajarĂ­a. (They assumed the price would go down.)

Future Tense Conjugation

PronounConjugationExample
YosupondrĂ©SupondrĂ© que estás ocupado si no contestas. (I will assume you’re busy if you don’t answer.)
TĂşsupondrásSupondrás que te estoy ignorando. (You will assume I’m ignoring you.)
Él/Ella/UstedsupondráElla supondrá que nos olvidamos. (She will assume we forgot.)
NosotrossupondremosSupondremos que es verdad hasta que se demuestre lo contrario. (We will assume it’s true until proven otherwise.)
VosotrossupondrĂ©isSupondrĂ©is que no nos importa. (You all will assume we don’t care.)
Ellos/UstedessupondránSupondrán que aprobamos el plan. (They will assume we approve the plan.)

Present Subjunctive Conjugation

PronounConjugationExample
YosupongaEs posible que yo suponga demasiado. (It’s possible that I assume too much.)
TĂşsupongasNo quiero que supongas nada malo. (I don’t want you to assume anything bad.)
Él/Ella/UstedsupongaDudo que Ă©l suponga la verdad. (I doubt he will guess the truth.)
NosotrossupongamosAunque supongamos lo peor, preparemos lo mejor. (Even if we assume the worst, let’s prepare for the best.)
VosotrossupongáisEspero que no supongáis que es fácil. (I hope you don’t assume it’s easy.)
Ellos/UstedessuponganNo creo que supongan nuestra estrategia. (I don’t think they will guess our strategy.)

Imperative (Command) Conjugation

PronounConjugation (Affirmative)Example
TĂşsupĂłn¡SupĂłn que tienes razĂłn! (Suppose you’re right!)
Ustedsuponga¡Suponga por un momento que es posible! (Suppose for a moment that it’s possible!)
Nosotrossupongamos¡Supongamos que es verdad! (Let’s suppose it’s true!)
Vosotrossuponed¡Suponed que ganamos la loterĂ­a! (Suppose we win the lottery!)
Ustedessupongan¡Supongan que el proyecto sale bien! (Suppose the project goes well!)

Verbals: Gerund & Infinitive

FormSpanishExample
GerundsuponiendoEstoy suponiendo que vendrás. (I am assuming you will come.)
InfinitivesuponerEs peligroso suponer sin evidence. (It’s dangerous to assume without evidence.)

Imperative (Command) Conjugation

Affirmative Commands

PronounConjugationExample
TĂşsupĂłn¡SupĂłn que tienes razĂłn! (Suppose you’re right!)
Ustedsuponga¡Suponga por un momento! (Suppose for a moment!)
Nosotrossupongamos¡Supongamos que es verdad! (Let’s suppose it’s true!)
Vosotrossuponed¡Suponed que ganamos! (Suppose we win!)
Ustedessupongan¡Supongan que sale bien! (Suppose it goes well!)

Negative Commands

PronounConjugationExample
TĂşno supongas¡No supongas nada malo! (Don’t suppose anything bad!)
Ustedno suponga¡No suponga lo peor! (Don’t suppose the worst!)
Nosotrosno supongamos¡No supongamos sin evidence! (Let’s not suppose without evidence!)
Vosotrosno supongáis¡No supongáis que es fácil! (Don’t suppose it’s easy!)
Ustedesno supongan¡No supongan que sabemos! (Don’t suppose we know!)

[SEE THE FULL SUPONER CONJUGATION IN ALL TENSES WITH OUR INTERACTIVE TOOL]

How to Use Suponer in Context

Making Assumptions and Guesses

  • Supongo que sĂ­, pero no estoy seguro. (I suppose so, but I’m not sure.)
  • ÂżQuĂ© supones que deberĂ­amos hacer? (What do you suppose we should do?)
  • Suponemos que el tren llegará a tiempo. (We assume the train will arrive on time.)

Expressing Hypothetical Situations

  • SupĂłn que tuvieras un millĂłn de dĂłlares. (Suppose you had a million dollars.)
  • Suponiendo que llueva, ÂżquĂ© haremos? (Assuming it rains, what will we do?)

Common Phrases and Idioms with Suponer

  • Suponer que (to assume that)
  • Dar por supuesto (to take for granted)
  • Suponer un reto (to pose a challenge)
  • Eso supone que… (That implies that…)
  • Ni mucho menos (far from it – used to contradict an assumption)

A Note on Culture & Common Mistakes

Cultural Insight: In Spanish conversation, using supongo can soften statements and show uncertainty, which is often appreciated as it leaves room for others’ opinions. It’s considered more polite than stating assumptions as facts.

Watch Out! The most common mistake is forgetting the stem change (o -> ue) in the present tense.

  • âś… Correct: Yo **supongo**TĂş **supones**
  • ❌ Incorrect: Yo *supono*TĂş *supones* (the second one is a spelling error that would be supones but should follow the stem change pattern)

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Continue Learning: Next, learn to express joy with: [Alegrarse Conjugation: Express Joy and Happiness in Spanish]