Conocer covers what English splits across to know (a person), to be familiar with (a place), to recognize, and — in the preterite — to meet for the first time. It is the partner verb of saber (to know facts, to know how), and the two are not interchangeable. Conjugation-wise, conocer has exactly one irregularity that travels across its paradigm: the yo form is conozco (not conoco), and that -zc- stem spreads to the entire present subjunctive and the negative imperative. Everything else is perfectly regular -er. The hard work on this verb is semantic, not morphological.
Non-finite forms
| Form | Spanish | English |
|---|---|---|
| Infinitivo | conocer | to know (be acquainted with) / to meet |
| Infinitivo compuesto | haber conocido | to have known / to have met |
| Gerundio | conociendo | knowing / meeting |
| Gerundio compuesto | habiendo conocido | having known / having met |
| Participio | conocido | known |
The participle conocido doubles as an adjective and a noun: un sitio conocido (a familiar spot), un conocido mío (an acquaintance of mine — distinct from un amigo, a friend).
Indicative — simple tenses
Presente
| yo | tú | él/ella/usted | nosotros | vosotros | ellos/ellas/ustedes |
|---|---|---|---|---|---|
| conozco | conoces | conoce | conocemos | conocéis | conocen |
The yo form conozco is the only irregularity in the present indicative. The -zc- exists for phonetic reasons: Spanish wants to keep the soft /θ/ (or /s/) of conoces, conoce alive before the o of yo. Writing conoco would force a hard /k/ sound; inserting z before the c preserves the original soft sound. The same trick produces parezco (parecer), agradezco (agradecer), crezco (crecer), establezco (establecer), and dozens of other -cer and -cir verbs.
No conozco a nadie en esta fiesta, ¿puedes presentarme a alguien?
I don't know anyone at this party, can you introduce me to someone?
¿Conocéis algún sitio bueno para cenar por aquí?
Do you know a good place to have dinner around here?
Pretérito perfecto simple
| yo | tú | él | nosotros | vosotros | ellos |
|---|---|---|---|---|---|
| conocí | conociste | conoció | conocimos | conocisteis | conocieron |
The preterite is fully regular in form — but its meaning shifts. Conocer in the present and imperfect means to know, to be acquainted with; in the preterite it means to meet (for the first time), to become acquainted with. This is one of a small group of Spanish verbs that change meaning in the preterite (others include saber → found out, querer → tried / no querer → refused, poder → managed). The logic is consistent: the preterite presents the act of acquaintance as a discrete, completed event, which naturally lands on the moment acquaintance began.
Conocí a mi marido en una boda hace doce años.
I met my husband at a wedding twelve years ago.
Aquel verano conocimos toda la costa norte.
That summer we got to know the whole north coast.
Pretérito imperfecto
| yo | tú | él | nosotros | vosotros | ellos |
|---|---|---|---|---|---|
| conocía | conocías | conocía | conocíamos | conocíais | conocían |
The imperfect carries the standard be acquainted with meaning over time — no lo conocía means I didn't know him (at that point), not I didn't meet him. Use this when describing a state of acquaintance in the past.
De pequeña conocía a todos los vecinos del barrio, ahora ya nada.
As a kid I knew all the neighbors in the area; not anymore.
Futuro simple
| yo | tú | él | nosotros | vosotros | ellos |
|---|---|---|---|---|---|
| conoceré | conocerás | conocerá | conoceremos | conoceréis | conocerán |
Mañana conoceréis a mi nuevo jefe, os va a caer muy bien.
Tomorrow you'll meet my new boss, you're going to really like him.
Condicional
| yo | tú | él | nosotros | vosotros | ellos |
|---|---|---|---|---|---|
| conocería | conocerías | conocería | conoceríamos | conoceríais | conocerían |
Me encantaría que conocieras a mis padres este fin de semana.
I'd love for you to meet my parents this weekend.
Indicative — compound tenses
All compound tenses pair haber with the regular participle conocido.
Pretérito perfecto compuesto
| yo | tú | él | nosotros | vosotros | ellos |
|---|---|---|---|---|---|
| he conocido | has conocido | ha conocido | hemos conocido | habéis conocido | han conocido |
In the compound form, the met for the first time reading carries over from the preterite. He conocido a Pablo unambiguously means I've met Pablo (the introduction has happened), not I'm acquainted with Pablo.
Esta semana he conocido a tres personas que trabajan en lo mismo que tú.
This week I've met three people who work in the same field as you.
Pretérito pluscuamperfecto
| yo | tú | él | nosotros | vosotros | ellos |
|---|---|---|---|---|---|
| había conocido | habías conocido | había conocido | habíamos conocido | habíais conocido | habían conocido |
Antes de aquel viaje a Granada no había conocido a nadie del sur.
Before that trip to Granada I'd never met anyone from the south.
Futuro compuesto
| yo | tú | él | nosotros | vosotros | ellos |
|---|---|---|---|---|---|
| habré conocido | habrás conocido | habrá conocido | habremos conocido | habréis conocido | habrán conocido |
Para fin de mes ya habremos conocido a todo el equipo nuevo.
By the end of the month we'll have met the whole new team.
Condicional compuesto
| yo | tú | él | nosotros | vosotros | ellos |
|---|---|---|---|---|---|
| habría conocido | habrías conocido | habría conocido | habríamos conocido | habríais conocido | habrían conocido |
Si no me hubiera mudado a Madrid, no te habría conocido nunca.
If I hadn't moved to Madrid, I would never have met you.
Subjunctive — simple tenses
Presente de subjuntivo
| yo | tú | él | nosotros | vosotros | ellos |
|---|---|---|---|---|---|
| conozca | conozcas | conozca | conozcamos | conozcáis | conozcan |
The -zc- of conozco spreads to every person of the present subjunctive — predictable from the general rule that the subjunctive stem is built from the yo form.
Quiero que conozcas a mi hermana, os vais a entender muy bien.
I want you to meet my sister, you two are going to hit it off.
Imperfecto de subjuntivo (-ra / -se)
| yo | tú | él | nosotros | vosotros | ellos | |
|---|---|---|---|---|---|---|
| -ra | conociera | conocieras | conociera | conociéramos | conocierais | conocieran |
| -se | conociese | conocieses | conociese | conociésemos | conocieseis | conociesen |
The imperfect subjunctive is built from the third-person plural preterite (conocieron), so the -zc- does NOT appear here. Both endings are interchangeable; -ra dominates in spoken Spain.
Me hubiera gustado que conocieras a mi abuela, era un personaje.
I would have liked for you to meet my grandmother, she was a real character.
Subjunctive — compound tenses
Pretérito perfecto de subjuntivo
| yo | tú | él | nosotros | vosotros | ellos |
|---|---|---|---|---|---|
| haya conocido | hayas conocido | haya conocido | hayamos conocido | hayáis conocido | hayan conocido |
Es una pena que no hayáis conocido a su padre, era encantador.
It's a shame you didn't get to meet his father, he was lovely.
Pluscuamperfecto de subjuntivo
| yo | tú | él | nosotros | vosotros | ellos | |
|---|---|---|---|---|---|---|
| -ra | hubiera conocido | hubieras conocido | hubiera conocido | hubiéramos conocido | hubierais conocido | hubieran conocido |
| -se | hubiese conocido | hubieses conocido | hubiese conocido | hubiésemos conocido | hubieseis conocido | hubiesen conocido |
Si hubiera conocido entonces lo que sé ahora, habría tomado otra decisión.
If I'd known then what I know now, I would have made a different decision.
Imperative
The peninsular affirmative vosotros form conoced is mandatory in Spain. The negative imperative borrows from the present subjunctive, so the -zc- runs through every negative form.
| Form | Affirmative | Negative |
|---|---|---|
| tú | conoce | no conozcas |
| usted | conozca | no conozca |
| nosotros | conozcamos | no conozcamos |
| vosotros | conoced | no conozcáis |
| ustedes | conozcan | no conozcan |
The imperative of conocer is genuinely uncommon — you almost never order someone to know someone — but conoced and conozca turn up in marketing copy and travel brochures: Conoced Asturias, Conozca usted nuestra nueva colección.
Conoced España de norte a sur con nuestros viajes en tren.
Get to know Spain from north to south with our train tours.
Conocer vs saber: the central distinction
Both verbs translate to know, but they cover different territory:
| Use | Verb | Example |
|---|---|---|
| Know a person | conocer | Conozco a tu hermano. |
| Know a place (be familiar with it) | conocer | Conozco Granada bastante bien. |
| Know a book / film / song (have experienced it) | conocer | ¿Conoces esta película? |
| Know a fact / piece of information | saber | Sé tu dirección. |
| Know how to do something | saber + infinitive | Sé conducir. |
| Know a language (know how to speak it) | saber | Sé inglés y un poco de alemán. |
The dividing line: conocer is acquaintance, contact, experience; saber is information and skill. Conozco París means I've been to Paris, I'm familiar with it; sé que París es la capital de Francia means I know that Paris is the capital of France. Both are know in English, but they answer different questions — and confusing them is the single most common transfer error in this verb.
Conozco a Marta desde el colegio, pero no sé dónde vive ahora.
I've known Marta since school, but I don't know where she lives now.
No conozco Sevilla y me encantaría visitarla algún día.
I haven't been to Seville and I'd love to visit some day.
High-frequency collocations from peninsular Spain
| Phrase | Translation |
|---|---|
| conocer a alguien | to know / to meet someone |
| conocer a alguien de vista | to know someone by sight (not personally) |
| conocer a alguien de toda la vida | to have known someone forever |
| darse a conocer | to make oneself known, to gain visibility |
| conocer como la palma de la mano | to know like the back of one's hand |
| ser un conocido (de) | to be an acquaintance (of) |
| encantado de conocerle / conocerte | (formal/informal) pleased to meet you |
| hacer conocer | to introduce, to make known |
A Sara la conozco de vista, pero nunca hemos hablado.
I know Sara by sight, but we've never spoken.
Madrid lo conozco como la palma de la mano, pregúntame lo que quieras.
I know Madrid like the back of my hand, ask me anything.
The classic English-speaker error
English speakers default to saber for know because it sounds more like I know stuff — and they then apply it to people: ❌ sé a tu hermano. This is one of the most reliably wrong sentences a learner produces. People are always conocer: conozco a tu hermano. Places are conocer: conozco Roma. Books, films, songs, brands you have experienced are conocer: ¿conoces esta canción?
The mirror error is using conocer for facts: ❌ conozco que vives en Madrid. Facts and information are saber: sé que vives en Madrid. A useful test: if the object is something you have encountered or experienced — a person, a place, a work — use conocer. If the object is a fact, a piece of data, or a skill (followed by infinitive), use saber.
Common Mistakes
❌ Yo conoco a tu hermano.
The yo form is conozco, with -zc-.
✅ Yo conozco a tu hermano.
I know your brother.
❌ Sé a tu hermana.
People are conocer, not saber.
✅ Conozco a tu hermana.
I know your sister.
❌ Conozco que vives en Sevilla.
Facts are saber, not conocer.
✅ Sé que vives en Sevilla.
I know you live in Seville.
❌ Conocí a Pablo desde hace diez años.
With desde hace (ongoing state), use the present: conozco a Pablo desde hace diez años.
✅ Conozco a Pablo desde hace diez años.
I've known Pablo for ten years.
❌ Quiero que conoces a mi madre.
Querer que triggers the subjunctive — conozcas, not conoces.
✅ Quiero que conozcas a mi madre.
I want you to meet my mother.
Key Takeaways
- Conocer covers know a person / a place / a work and meet for the first time (in the preterite and compound past).
- The yo form is conozco (with -zc-), and the same -zc- runs through the present subjunctive and the negative imperative.
- The preterite conocí normally means I met (for the first time); use the imperfect conocía for I knew, I was acquainted with.
- People take a personal: conozco a tu hermano, never conozco tu hermano.
- Pair this verb with saber (facts, skills) and learn the dividing line: acquaintance vs information.
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