deducir Present Subjunctive Conjugation
deducir — to deduce
The present subjunctive uses the 'z' from the yo form throughout: deduzca, deduzcas, deduzca.
deducir Present Subjunctive Forms
When to Use the Present Subjunctive
Use this when expressing doubt, wishes, or requirements about a deduction, such as 'I want you to deduce...' or 'It's possible they deduct...'
Notes on deducir in the Present Subjunctive
Because the 'yo' form of the present indicative is 'deduzco', the entire present subjunctive uses 'deduzc-' as the stem.
Example Sentences
Espero que deduzcas la solución pronto.
I hope you deduce the solution soon.
tú
Dudo que ellos deduzcan el dinero hoy.
I doubt they will deduct the money today.
ellos/ellas/ustedes
Es importante que deduzcamos el origen del problema.
It is important that we deduce the origin of the problem.
nosotros
Common Mistakes
Mistake: Que yo deduca.
Correct: Que yo deduzca.
Why: The subjunctive must follow the irregular 'yo' stem to maintain the soft 's/z' sound.
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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.
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.