Conocer Conjugation: The Complete Guide to “To Know” in Spanish
Spanish Essential Verbs Hub | Conocer Quiz |
CONOCER (to know) is the verb for familiarity — people you’ve met, places you’ve been, things you’ve experienced. It’s a spelling-change verb: the yo form of the present, conozco, inserts a zc to preserve the soft c sound. Every other form in every tense is fully regular.
This guide covers everything you need: the full conjugation in the present, preterite, and imperfect tenses; the main uses of the verb; the personal a that learners drop; the conocí vs conocía meaning shift; and the mistakes to avoid. By the end, you’ll know not just how to conjugate conocer, but when it’s the right verb — and when saber is.
Key Takeaways
- CONOCER means “to know” in the sense of familiarity — people, places, things you’ve encountered.
- It’s a spelling-change verb: the yo form of the present is conozco (the c becomes zc).
- The preterite is regular: conocí, conociste, conoció, conocimos, conocisteis, conocieron.
- The imperfect is regular: conocía, conocías, conocía, conocíamos, conocíais, conocían.
- Conocí vs conocía is a meaning shift: conocí = I met, conocía = I knew.
- Conocer + a for people: Conozco a María — the personal a is required.
- Saber = facts, information, skills. Conocer = familiarity with people, places, things.
Conjugation of CONOCER in the Present Tense
Conocer is irregular only in the yo form: conozco. The c of the stem becomes zc to keep the soft sound before o. All other forms follow a regular -er pattern.
| Pronoun | Conjugation | English |
|---|---|---|
| Yo | conozco | I know |
| Tú | conoces | You know (informal) |
| Él / Ella / Usted | conoce | He / She knows, You know (formal) |
| Nosotros / Nosotras | conocemos | We know |
| Vosotros / Vosotras | conocéis | You all know (Spain, informal) |
| Ellos / Ellas / Ustedes | conocen | They know, You all know (formal) |
Example Sentences
- Yo conozco a María desde la universidad. (I’ve known María since university.)
- ¿Tú conoces Madrid? (Do you know Madrid?)
- Ella conoce muchos restaurantes buenos. (She knows many good restaurants.)
- Nosotros conocemos bien el barrio. (We know the neighborhood well.)
A Note on Vosotros
Vosotros and vosotras are used primarily in Spain. In Latin America, ustedes covers both formal and informal plural address, and vosotros is essentially absent from everyday speech. If you’re learning Spanish for Latin America, you’ll recognize conocéis in writing but won’t need to produce it. If you’re studying for a Spain-based exam or spending time in Spain, learn it alongside the other forms.
Conjugation of CONOCER in the Preterite
The preterite of conocer is regular in form. Note that the meaning shifts — conocí means “I met,” not “I knew.”
| Pronoun | Conjugation | English |
|---|---|---|
| Yo | conocí | I met |
| Tú | conociste | You met (informal) |
| Él / Ella / Usted | conoció | He / She met, You met (formal) |
| Nosotros / Nosotras | conocimos | We met |
| Vosotros / Vosotras | conocisteis | You all met (Spain, informal) |
| Ellos / Ellas / Ustedes | conocieron | They met |
Example Sentences
- Conocí a mi mejor amiga en el colegio. (I met my best friend at school.)
- ¿Conociste a su hermano? (Did you meet her brother?)
- Conoció a su esposa en un viaje. (He met his wife on a trip.)
- Conocimos a los vecinos el primer día. (We met the neighbors the first day.)
Conjugation of CONOCER in the Imperfect
The imperfect of conocer is fully regular: stem conoc- plus the standard -er imperfect endings. Note the accent marks on conocía, conocías, and conocíamos.
| Pronoun | Conjugation | English |
|---|---|---|
| Yo | conocía | I knew / I used to know |
| Tú | conocías | You knew / You used to know (informal) |
| Él / Ella / Usted | conocía | He / She knew, You knew (formal) |
| Nosotros / Nosotras | conocíamos | We knew / We used to know |
| Vosotros / Vosotras | conocíais | You all knew (Spain, informal) |
| Ellos / Ellas / Ustedes | conocían | They knew |
Example Sentences
- Conocía a María de vista, pero no hablábamos. (I knew María by sight, but we didn’t talk.)
- ¿Conocías este restaurante antes? (Did you know this restaurant before?)
- Mi abuelo conocía toda la ciudad de memoria. (My grandfather knew the whole city by heart.)
- Conocíamos el camino perfectamente. (We knew the way perfectly.)
Preterite vs Imperfect with CONOCER — The Meaning Shift
Like saber, conocer carries a meaning shift between past tenses.
- Conocí = I met (the moment of first meeting). Conocí a María en 2020 = I met María in 2020.
- Conocía = I knew (ongoing familiarity). Conocía a María de vista = I knew María by sight.
- No conocí = I didn’t meet (a specific missed meeting). No conocí a su hermano = I didn’t meet her brother.
- No conocía = I didn’t know (ongoing unfamiliarity). No conocía ese lugar = I didn’t know that place.
This is the conocer parallel to saber’s supe/sabía shift. Same rule, different verb.
The Main Uses of CONOCER
1. Knowing People
Conocer + a + person means “to know” someone — you’ve met them. The personal a is required.
- Conozco a Juan desde hace años. (I’ve known Juan for years.)
- ¿Conoces a mi hermana? (Do you know my sister?)
- Conocemos a los vecinos nuevos. (We know the new neighbors.)
Note on the personal a: The a is required when the direct object is a specific person. Conozco a María — not Conozco María. This is one of the most commonly dropped elements in learner Spanish.
2. Knowing Places
Conocer a place means you’ve been there — you’re familiar with it.
- Conozco Madrid muy bien. (I know Madrid well.)
- ¿Conoces ese bar? (Do you know that bar?)
- Conocemos varias ciudades de España. (We know several cities in Spain.)
3. Knowing Things
Conocer a thing means you’re familiar with it — books, music, food, works of art.
- Conozco esa canción. (I know that song.)
- ¿Conoces la obra de Lorca? (Do you know Lorca’s work?)
- Conoce muy bien la cocina italiana. (He knows Italian cooking very well.)
4. Meeting Someone — The Preterite Use
In the preterite, conocer means “to meet” — the moment of first encounter.
- Conocí a tu padre en Sevilla. (I met your father in Seville.)
- ¿Cuándo conociste a tu mejor amigo? (When did you meet your best friend?)
- Nos conocimos en una fiesta. (We met at a party.)
The reflexive conocerse is common here: Se conocieron en Madrid (They met in Madrid).
5. Common Idioms with CONOCER
- conocer de vista — to know by sight
- Conozco a ese hombre de vista. (I know that man by sight.)
- conocer de oídas — to know by hearsay
- Conozco ese pueblo de oídas. (I know that town by hearsay.)
- darse a conocer — to make oneself known
- El actor se dio a conocer en los años 90. (The actor made himself known in the 90s.)
- dar a conocer — to make known, to announce
- El gobierno dio a conocer la noticia. (The government announced the news.)
Conocer vs. Saber — The Short Version
This is the distinction every learner has to internalize. The full treatment is in the dedicated Saber vs. Conocer guide, but the short version:
| Conocer | Saber |
|---|---|
| People: Conozco a María | Facts: Sé la respuesta |
| Places: Conozco Madrid | Information: Sé la hora |
| Things: Conozco esa canción | Skills: Sé nadar |
The simple rule: If you’ve met it, been there, or are familiar with it — conocer. If you learned it, know it as a fact, or can recite it — saber.
Common Mistakes
- Dropping the personal a. It’s Conozco a María, not Conozco María. The a is required before a person.
- Forgetting the yo form is conozco. Not conoco. The c becomes zc before o.
- Using conocer for facts or skills. Conozco nadar is wrong. Skills take saber: Sé nadar. Facts take saber: Sé la respuesta.
- Using saber for people or places. Sé Madrid is wrong. It’s Conozco Madrid. Sé a María is wrong. It’s Conozco a María.
- Missing the meaning shift in the preterite. Conocí means “I met,” not “I knew.” If you want “I knew,” use conocía.
- Dropping the accent in the preterite. Conocí, conoció — the accent is required.
Putting It All Together
Imagine describing how you met your partner. Conocí a Marta en 2019 en una conferencia. Al principio no la conocía bien, pero hablamos durante horas. Ella conocía muchísima gente del sector, y yo no conocía a nadie. Después de la conferencia, quedamos para cenar. Yo conocía un restaurante italiano cerca del centro, y ella no lo conocía. Cenamos allí y hablamos toda la noche. Desde entonces, conocemos juntos casi todas las ciudades de España. Es curioso cómo una persona desconocida se convierte en la persona que mejor conoces. Every underlined form is conocer — meeting, knowing people, knowing places, and the preterite/imperfect contrast — all in one short paragraph.
Quick Reference Chart
| Tense | Yo | Tú | Él / Ella / Ud. | Nosotros | Vosotros | Ellos / Uds. |
|---|---|---|---|---|---|---|
| Present | conozco | conoces | conoce | conocemos | conocéis | conocen |
| Preterite | conocí | conociste | conoció | conocimos | conocisteis | conocieron |
| Imperfect | conocía | conocías | conocía | conocíamos | conocíais | conocían |
Practice Exercise
Fill in the blank with the correct form of conocer.
- Yo ____ a María desde la universidad. (answer: conozco)
- ¿Tú ____ Madrid? (answer: conoces)
- ____ a mi mejor amiga en el colegio. (answer: Conocí)
- Cuando era niño, ____ toda la ciudad de memoria. (answer: conocía)
- Nosotros ____ a los vecinos el primer día. (answer: conocimos)
Ready to Master Conocer Completely?
You’ve got the conjugation, the uses, and the conocer vs. saber contrast. The next step is putting them to work — under pressure, with feedback, at a pace that builds from simple to advanced.
Take the Conocer Conjugation Quiz to test yourself across all four levels: Basic, Intermediate, Advanced, and Practice. Each set builds on the last. levels: Basic, Intermediate, Advanced, and Practice. Each set builds on the last.
👉 Take the Conocer Conjugation Quiz
📚 CONOCER: Frequently Asked Questions
A: Conocer is irregular only in the yo form. The forms are: conozco, conoces, conoce, conocemos, conocéis, conocen. The yo form is conozco — the c of the stem becomes zc to keep the soft sound before o. All other forms follow a regular -er pattern.
A: Yes. The preterite of conocer is regular: conocí, conociste, conoció, conocimos, conocisteis, conocieron. Note the accent marks on conocí and conoció. The meaning also shifts — conocí means “I met,” not “I knew.”
A: Yes. The imperfect of conocer is fully regular: conocía, conocías, conocía, conocíamos, conocíais, conocían. Take the stem conoc- and add the standard -er imperfect endings. Note the accent marks on conocía, conocías, and conocíamos.
A: Conocer is for familiarity with people, places, and things: Conozco a María (I know María), Conozco Madrid (I know Madrid). Saber is for facts, information, and skills: Sé la respuesta (I know the answer), Sé nadar (I know how to swim). The simple rule: if you’ve met it or been there, use conocer. If you learned it or can recite it, use saber.
A: Conocí (preterite) means “I met” — the moment of first meeting: Conocí a María en 2020 (I met María in 2020). Conocía (imperfect) means “I knew” — ongoing familiarity: Conocía a María de vista (I knew María by sight). This is the conocer parallel to saber’s supe/sabía shift.
A: Yes. When the direct object is a person, the personal a is required: Conozco a María (I know María), ¿Conoces a mi hermano? (Do you know my brother?). The a is not used for places or things: Conozco Madrid, Conozco esa canción. Dropping the personal a is one of the most common learner mistakes.
A: Use conocer in the preterite: Conocí a Juan en una fiesta (I met Juan at a party), ¿Cuándo conociste a tu mejor amigo? (When did you meet your best friend?). The reflexive conocerse is common for mutual meetings: Se conocieron en Madrid (They met in Madrid). For meeting up with someone already known, use ver or encontrarse con: Voy a ver a Juan.
A: Conocer de vista means “to know by sight”: Conozco a ese hombre de vista (I know that man by sight). It’s a common idiom that expresses partial familiarity — you recognize the person but don’t know them personally. There’s also conocer de oídas (to know by hearsay), for things you’ve heard about but not experienced.
A: It’s a spelling change, not a pronunciation change. In Spanish, c before e or i makes a soft sound (like English “s” in Spain, “s” in Latin America), and c before a, o, or u makes a hard sound (like English “k”). To keep the soft sound before o, the spelling changes to zc: conozco. The same pattern applies to parecer (parezco), conducir (conduzco), and other -cer and -cir verbs.
A: The six most common mistakes are:
- Dropping the personal a — Conozco a María, not Conozco María.
- Forgetting the yo form is conozco — producing conoco instead.
- Using conocer for facts or skills — Sé nadar, not Conozco nadar.
- Using saber for people or places — Conozco Madrid, not Sé Madrid.
- Missing the meaning shift — conocí means “I met,” not “I knew.”
- Dropping the accent in the preterite — it’s conocí, not conoci.
