Saber Conjugation: All Tenses, Explained Simply (with Examples)

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Saber means “to know”, but the moment you open its conjugation table it throws two surprises at you: a yo form that looks nothing like the infinitive (sé), and a preterite that often means “I found out” in contexts where the imperfect would mean “I knew” (supe versus sabía). Get past those two quirks and the rest of saber is refreshingly predictable.

Don't worry. By the end of this guide you'll have the main modern tenses of saber laid out in clean tables, with examples, plus the important distinction between saber and its near-twin conocer. The tables use the tú and vosotros forms; regions that use vos have additional forms. But first, the shortcut that gets you speaking sooner.

The Saber Conjugation Hack: Learn These First

You do not need to memorise every tense before you can use saber in real conversation. Beginners can do a lot with a small handful of forms.

If you learn nothing else today, learn the present tense of saber by heart:

• sé (“I know”), sabes (“you know”), sabe (“he/she/it knows”), sabemos (“we know”), sabéis (“you all know”), saben (“they know”)

That single row of six words will carry you through “I know how to…”, “Do you know…?”, and “She knows that…” in almost any conversation. Add the preterite (supe, “I found out”) for the moment something clicked into place, and the imperfect (sabía, “I used to know” / “I didn't know at the time”) for background knowledge, and you've covered the vast majority of everyday speech. Everything below that is for rounding out your Spanish over time, not for blocking you today.

Right, now let's build the full picture.

Saber at a Glance

Infinitive	saber
Gerund (-ing)	sabiendo
Past participle	sabido
Verb type	irregular
English meaning	“to know” (facts, information, how to do something)

A quick note on the pronouns I'll use in every table:

Spanish	English
yo	I
tú	you (informal singular)
él / ella / usted	he / she / you (formal singular)
nosotros / nosotras	we
vosotros / vosotras	you all (informal, Spain)
ellos / ellas / ustedes	they / you all (formal)

Saber Conjugation: Indicative Mood (Simple Tenses)

The indicative is the everyday, “stating facts” mood, and these five simple tenses are the backbone of saber. Here they all are in one place:

Pronoun	Present	Preterite	Imperfect	Future	Conditional
yo	sé	supe	sabía	sabré	sabría
tú	sabes	supiste	sabías	sabrás	sabrías
él / ella / usted	sabe	supo	sabía	sabrá	sabría
nosotros/as	sabemos	supimos	sabíamos	sabremos	sabríamos
vosotros/as	sabéis	supisteis	sabíais	sabréis	sabríais
ellos / ellas / ustedes	saben	supieron	sabían	sabrán	sabrían

And here's each one in action:

• Present – Sé la respuesta. – “I know the answer.”
• Preterite (a specific moment of finding something out, not an ongoing state) – Supe la verdad ayer. – “I found out the truth yesterday.”
• Imperfect (knowledge you already had, as background) – No sabía que hablabas alemán. – “I didn't know you spoke German.”
• Future – Sabrás la nota mañana. – “You'll know the grade tomorrow.”
• Conditional – Sabría la respuesta si hubiera estudiado. – “I would know the answer if I had studied.”

Saber Conjugation: Indicative Mood (Compound Tenses)

Good news here: the compound tenses follow one pattern. Each combines the relevant form of haber with the past participle sabido. The same haber plus participle structure applies across Spanish, although some other verbs have irregular participles.

Pronoun	Present Perfect	Pluperfect	Future Perfect	Conditional Perfect
yo	he sabido	había sabido	habré sabido	habría sabido
tú	has sabido	habías sabido	habrás sabido	habrías sabido
él / ella / usted	ha sabido	había sabido	habrá sabido	habría sabido
nosotros/as	hemos sabido	habíamos sabido	habremos sabido	habríamos sabido
vosotros/as	habéis sabido	habíais sabido	habréis sabido	habríais sabido
ellos / ellas / ustedes	han sabido	habían sabido	habrán sabido	habrían sabido

• Present perfect – Siempre he sabido que eras especial. – “I've always known you were special.”
• Pluperfect – Siempre había sabido la verdad. – “I had always known the truth.”
• Future perfect – Para entonces, ya habrás sabido lo que ocurrió. – “By then, you'll already have found out what happened.”
• Conditional perfect – Habría sabido qué hacer. – “I would have known what to do.”

(There's one more, the pretérito anterior, hube sabido, but you can happily ignore it. It's so rare in modern Spanish that even native speakers go their whole lives without using it.)

Saber Conjugation: Subjunctive Mood

The subjunctive appears in many subordinate clauses prompted by doubt, wishes, emotion, evaluation and other contexts where the speaker is not simply presenting information as a fact. For everyday use, start with the present and imperfect subjunctive.

Pronoun	Present Subjunctive	Imperfect Subjunctive (-ra)	Imperfect Subjunctive (-se)
yo	sepa	supiera	supiese
tú	sepas	supieras	supieses
él / ella / usted	sepa	supiera	supiese
nosotros/as	sepamos	supiéramos	supiésemos
vosotros/as	sepáis	supierais	supieseis
ellos / ellas / ustedes	sepan	supieran	supiesen

The imperfect subjunctive has two series, in -ra and -se. They are usually equivalent in ordinary subjunctive uses, though preferences vary by region and style. The -ra series is more common in speech, especially in Latin America, so it is a practical one to learn first.

• Present subjunctive – Dudo que sepas la respuesta. – “I doubt (that) you know the answer.”
• Imperfect subjunctive – Si supiera la verdad, te lo diría. – “If I knew the truth, I would tell you.”

The subjunctive also has compound forms, built (again) from haber plus sabido:

Pronoun	Present Perfect Subj.	Pluperfect Subj.
yo	haya sabido	hubiera / hubiese sabido
tú	hayas sabido	hubieras / hubieses sabido
él / ella / usted	haya sabido	hubiera / hubiese sabido
nosotros/as	hayamos sabido	hubiéramos / hubiésemos sabido
vosotros/as	hayáis sabido	hubierais / hubieseis sabido
ellos / ellas / ustedes	hayan sabido	hubieran / hubiesen sabido

There's also a future subjunctive (supiere, supieres…), but it is rare in modern everyday Spanish. You may still encounter it in legal language, proverbs and set formulas, so recognition matters more than active use for most learners.

Saber Conjugation: Imperative Mood (Commands)

Pronoun	Affirmative	Negative
tú	sabe	no sepas
usted	sepa	no sepa
nosotros/as	sepamos	no sepamos
vosotros/as	sabed	no sepáis
ustedes	sepan	no sepan

You'll barely ever command someone to “know” something, so this table gets far less real-world use than ser‘s or hablar‘s. The one construction you'll genuinely hear is the present subjunctive doing imperative-style duty in the fixed phrase que sepas, “just so you know”:

• ¡Que sepas que te lo agradezco mucho! – “Just so you know, I really appreciate it!”
• Sabe que puedes contar conmigo. – “Know that you can count on me.” (a little literary)

When to Use Saber (Saber vs Conocer)

This distinction catches even advanced learners. Spanish has two common verbs for “to know”. Their meanings overlap at the edges, but the following contrast is a reliable starting point.

Saber is for facts, information, and know-how, things you either have memorised or can do:

• Sé la respuesta. – “I know the answer.” (a fact)
• Sé nadar. – “I know how to swim.” (a skill, saber + infinitive)
• ¿Sabes qué hora es? – “Do you know what time it is?”

Conocer is for familiarity, being acquainted with a person, place, or thing:

• Conozco a María. – “I know María.” (notice the personal a before a person)
• Conozco Madrid. – “I know Madrid.” (I've been there, I'm familiar with it)

The practical rule: use saber for facts, information and knowing how to do something; use conocer for familiarity or acquaintance. You sabes a fact and conoces a city. There are broader and regional uses of conocer, but this distinction covers the examples beginners need most often.

One more twist: in many contexts, the preterite of saber highlights acquiring knowledge. Sabía (imperfect) can mean “I knew” as an ongoing state, while supe often means “I found out” at a bounded moment. Context still matters: the preterite can also describe knowing how or managing to respond in a completed situation.

• Sabía su nombre. – “I knew his name” (already, as background).
• Supe su nombre. – “I found out his name” (right at that moment).

Why Is Saber Irregular?

Saber‘s irregularities don't all come from the same place, which is why the full set of tables looks so patchy.

• The irregular yo form, sé, does not follow the regular -o pattern. Sabo is not the standard first-person present form of saber. The written accent distinguishes sé from the pronoun se.
• The preterite stem sup- belongs to the strong-preterite pattern, alongside forms such as tuve, pude and estuve. Forms such as supe and supo do not take written accents.
• The future and conditional use sabr-: sabré, sabrás, sabría and so on. Learn it as an irregular stem, just as you learn podr- for poder and querr- for querer.
• The present subjunctive uses sep-: sepa, sepas, sepamos and the other forms in the table. It needs to be learned as its own small chunk.

These irregular stems look less arbitrary once you group the forms that share them.

Common Mistakes with Saber

A few traps that catch nearly everyone:

• Confusing saber and conocer. As a starting point, facts and skills take saber, while people and familiarity with places take conocer. Check real examples as you move beyond that basic contrast.
• Sé (the verb) versus se (the pronoun). Sé with an accent is “I know” or the tú command “know”. Without the accent, se is a pronoun used in constructions such as se llama and se puede.
• Treating every supe as an ongoing “I knew”. The preterite often means “I found out” or “I realised”, while background knowledge normally takes sabía. Other bounded readings are possible, so use the surrounding sentence rather than translating the form in isolation.

Saber Conjugation FAQ

Is saber regular or irregular? Irregular. The yo form (sé), the preterite stem (sup-), the future/conditional stem (sabr-), and the subjunctive stem (sep-) all break from the regular pattern in their own way.

What's the difference between saber and conocer? Both translate as “to know” in English, but saber is for facts and skills (sé la respuesta, sé nadar), while conocer is for being familiar with a person or place (conozco a María, conozco Madrid).

What are the six present-tense forms of saber? Sé, sabes, sabe, sabemos, sabéis, saben, which is “I know, you know, he/she knows, we know, you all know, they know.”

Why can supe mean “found out”? The preterite presents a bounded past situation. With saber, context often makes that boundary the moment knowledge was acquired, so supe is frequently translated as “I found out”. It is not the only possible reading.

How do you conjugate saber in the past tense? Two main options. The preterite (a specific moment of finding out) is supe, supiste, supo, supimos, supisteis, supieron. The imperfect (ongoing or background knowledge) is sabía, sabías, sabía, sabíamos, sabíais, sabían.

¡Ya Sabes Saber!

Ya sabes means “you already know”. You now have the main modern forms of saber, examples of their use, a practical saber versus conocer distinction and the patterns behind the verb's irregular stems.

The fastest way to lock these in is to use them. Build a few of these forms into flashcards (we love Anki for exactly this), then start dropping sé and supe into real sentences out loud. While you're at it, pair this with our guide to ser vs estar, another pair of Spanish verbs that look interchangeable in English but aren't, and our guide to Spanish numbers so you can actually say sé contar hasta cien and mean it. If you'd like to hear saber used naturally by native speakers, SpanishPod101 is a great listening resource.

But the tables were only ever the warm-up. The whole point of learning sé, sabes and sabe is to walk up to a real person and tell them something you genuinely know, which is exactly what we get you doing from day one inside the Fluent in 3 Months Bootcamp. So go and know something in Spanish. ¡Ahora ya lo sabes!