deducir Imperfect Subjunctive Conjugation
deducir — to deduce
The imperfect subjunctive uses the 'j' stem from the preterite: dedujera, dedujeras, dedujera.
deducir Imperfect Subjunctive Forms
When to Use the Imperfect Subjunctive
Use this for hypothetical 'if' scenarios (e.g., 'If I deduced...') or after past-tense verbs of influence or emotion.
Notes on deducir in the Imperfect Subjunctive
This tense is built from the 3rd person plural preterite (dedujeron). Drop the -on and add -a, -as, -a, etc. Always uses the 'j' stem.
Example Sentences
Si yo dedujera eso, estaría equivocado.
If I deduced that, I would be wrong.
yo
Me pidió que dedujéramos los gastos.
He asked us to deduct the expenses.
nosotros
Si ellos dedujeran el IVA, el precio bajaría.
If they deducted the VAT, the price would go down.
ellos/ellas/ustedes
Common Mistakes
Mistake: Deduciera.
Correct: Dedujera.
Why: The imperfect subjunctive always follows the preterite stem (deduj-), not the infinitive.
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Related Tenses
Present
yo: deduzco
The present tense of deducir uses a 'zc' spelling change in the yo form: yo deduzco.
Preterite
yo: deduje
The preterite of deducir is irregular, using a 'j' stem: deduje, dedujiste, dedujo.
Imperfect
yo: deducía
The imperfect of deducir is completely regular: deducía, deducías, deducía.
Future
yo: deduciré
The future tense of deducir is regular: deduciré, deducirás, deducirá.
Conditional
yo: deduciría
The conditional of deducir is regular: deduciría, deducirías, deduciría.
Present Subjunctive
yo: deduzca
The present subjunctive uses the 'z' from the yo form throughout: deduzca, deduzcas, deduzca.
Affirmative Imperative
yo: deduce
Use 'deduce' for tú and 'deduzca' for formal commands.
Negative Imperative
yo: no deduzcas
The negative imperative always uses the 'z' stem: no deduzcas, no deduzca.