deducir Imperfect Conjugation
deducir — to deduce
The imperfect of deducir is completely regular: deducía, deducías, deducía.
deducir Imperfect Forms
When to Use the Imperfect
Use the imperfect to describe a process of deduction that was ongoing in the past or a habit of deducting taxes every year.
Notes on deducir in the Imperfect
Deducir is regular in the imperfect. It uses the standard -ir endings: -ía, -ías, -ía, -íamos, -íais, -ían.
Example Sentences
De niño, yo deducía todo por pura lógica.
As a child, I used to deduce everything by pure logic.
yo
Ustedes deducían los gastos cada mes.
You all used to deduct the expenses every month.
ellos/ellas/ustedes
Nadie deducía nada sospechoso en ese momento.
Nobody was inferring anything suspicious at that time.
él/ella/usted
Common Mistakes
Mistake: Deducia (without accent).
Correct: Deducía.
Why: All imperfect endings for -er and -ir verbs require an accent on the 'í'.
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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.
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.
Imperfect Subjunctive
yo: dedujera
The imperfect subjunctive uses the 'j' stem from the preterite: dedujera, dedujeras, dedujera.
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.