saber Future Conjugation
saber — to know
Saber uses the irregular stem 'sabr-' followed by standard future endings.
saber Future Forms
When to Use the Future
Use this to say you will find something out later, or to express probability about what someone might know right now.
Notes on saber in the Future
The 'e' in the infinitive drops out, changing the stem from 'saber-' to 'sabr-'.
Example Sentences
Mañana sabremos los resultados.
Tomorrow we will know the results.
nosotros
Algún día lo sabrás todo.
Someday you will know everything.
tú
Ellos sabrán qué hacer.
They will know what to do.
ellos/ellas/ustedes
Common Mistakes
Mistake: Saberé.
Correct: Sabré.
Why: Saber is one of the few verbs that drops the infinitive vowel to form its future stem.
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Related Tenses
Present
yo: sé
Saber is regular in the present tense except for the 'yo' form, which is the unique word 'sé'.
Preterite
yo: supe
In the preterite, saber changes meaning to 'found out' or 'learned' and uses the irregular stem 'sup-'.
Imperfect
yo: sabía
The imperfect of saber is completely regular: sabía, sabías, sabía, sabíamos, sabíais, sabían.
Conditional
yo: sabría
The conditional uses the same irregular stem as the future: 'sabr-'.
Present Subjunctive
yo: sepa
The present subjunctive of saber is irregular: sepa, sepas, sepa, sepamos, sepáis, sepan.
Imperfect Subjunctive
yo: supiera
The imperfect subjunctive uses the preterite stem 'sup-': supiera, supieras, supiera...
Affirmative Imperative
yo: sabe
The imperative of saber is rarely used alone but appears in phrases like 'Sabe que...' or 'Sepa usted...'.
Negative Imperative
yo: no sepas
All negative commands for saber use the present subjunctive forms preceded by 'no'.