deducir Present Conjugation
deducir — to deduce
The present tense of deducir uses a 'zc' spelling change in the yo form: yo deduzco.
deducir Present Forms
When to Use the Present
Use the present to talk about logical conclusions you reach regularly, things you infer from facts right now, or tax deductions you claim annually.
Notes on deducir in the Present
Deducir follows the pattern of -cer/-cir verbs preceded by a vowel: it adds a 'z' before the 'c' in the 'yo' form (deduzco). All other forms are regular.
Example Sentences
Yo deduzco que ella no vendrá por el clima.
I deduce that she won't come because of the weather.
yo
¿Qué deduces de esta situación?
What do you infer from this situation?
tú
Nosotros deducimos los gastos de viaje en los impuestos.
We deduct travel expenses from our taxes.
nosotros
Ellos deducen el significado por el contexto.
They deduce the meaning from the context.
ellos/ellas/ustedes
Common Mistakes
Mistake: Yo deduco.
Correct: Yo deduzco.
Why: Verbs ending in -ducir always change to -duzco in the first person present to maintain the soft 'z' sound before an 'o'.
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Related Tenses
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.
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.