suponer Imperfect Subjunctive Conjugation
suponer — to suppose
Based on the preterite 'supusieron', the stem is 'supusiera-'.
suponer Imperfect Subjunctive Forms
When to Use the Imperfect Subjunctive
Use this for hypothetical 'if' situations or past requests (e.g., 'If I assumed that...').
Notes on suponer in the Imperfect Subjunctive
It follows the irregular preterite stem 'supus-'. Always use the 3rd person plural preterite (supusieron) as your base.
Example Sentences
Si yo supusiera eso, no estaría aquí.
If I assumed that, I wouldn't be here.
yo
Me pidió que supusiera el peor escenario.
He asked me to assume the worst-case scenario.
yo
Si ellos supusieran la verdad, se enfadarían.
If they knew (guessed) the truth, they would get angry.
ellos/ellas/ustedes
Common Mistakes
Mistake: Using 'suponiera'.
Correct: The correct form is supusiera.
Why: This tense is always derived from the irregular preterite stem 'supus-'.
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Related Tenses
Present
yo: supongo
Suponer follows the pattern of 'poner' in the present, with a 'go' ending in the yo form: supongo.
Preterite
yo: supuse
Suponer uses the irregular stem 'supus-' in the preterite: supuse, supusiste, supuso.
Imperfect
yo: suponía
Suponer is completely regular in the imperfect: suponía, suponías, suponía.
Future
yo: supondré
Suponer has an irregular stem in the future: supondré, supondrás, supondrá.
Conditional
yo: supondría
The conditional uses the same irregular stem as the future: supondría, supondrías.
Present Subjunctive
yo: suponga
The present subjunctive is built from the 'yo' form 'supongo': suponga, supongas, suponga.
Affirmative Imperative
yo: supón
The command for 'tú' is 'supón'; other forms use the 'supong-' stem.
Negative Imperative
yo: no supongas
The negative command uses 'no' plus the present subjunctive: no supongas, no suponga.