interponer Imperfect Subjunctive Conjugation
interponer — to file
The imperfect subjunctive uses the irregular 'interpusi-' stem derived from the preterite.
interponer Imperfect Subjunctive Forms
When to Use the Imperfect Subjunctive
Use this for hypothetical legal situations or past requests, such as 'If I were to file an appeal' or 'They asked us to file a claim'.
Notes on interponer in the Imperfect Subjunctive
It follows the irregular 'interpuso' preterite root. Always use 'interpusiera' (or the less common 'interpusiese') rather than 'interponiera'.
Example Sentences
Si interpusieras una demanda, ganarías el caso.
If you were to file a lawsuit, you would win the case.
tú
Me sugirieron que interpusiéramos el recurso ayer.
They suggested that we file the appeal yesterday.
nosotros
Dudaba que ellos interpusieran la denuncia a tiempo.
I doubted that they would file the report on time.
ellos/ellas/ustedes
Common Mistakes
Mistake: Using 'interponiera' or 'interponiese'.
Correct: interpusiera
Why: This tense is built on the preterite stem 'interpusi-', not the infinitive stem.
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Related Tenses
Present
yo: interpongo
The present is regular except for the 'yo' form, which adds a 'g' (interpongo).
Preterite
yo: interpuse
Interponer is highly irregular in the preterite, using the stem 'interpusi-' with special endings.
Imperfect
yo: interponía
The imperfect of interponer is completely regular: interponía, interponías, etc.
Future
yo: interpondré
The future tense uses the irregular stem 'interpondr-' followed by standard future endings.
Conditional
yo: interpondría
The conditional uses the irregular stem 'interpondr-' (the same as the future).
Present Subjunctive
yo: interponga
The present subjunctive of interponer follows the 'yo' form (interpongo), resulting in interpong- endings.
Affirmative Imperative
yo: interpón
The imperative uses 'interpón' for tú and 'interponga' for formal commands.
Negative Imperative
yo: no interpongas
The negative imperative uses 'no' plus the present subjunctive forms (interpongas).