Conjugate ser in Spanish
to be (essential/permanent)
ser is an irregular -er verb ranked #1 among the most common Spanish verbs. For example: "Yo soy profesor." (I am a teacher.). Use the tables below for full conjugation across all 7 tenses.
ser — Spanish Conjugation Chart
to be (essential/permanent) · -er verb · irregular (irregular) · conjugado.com
Describes current actions, habits, and general truths. The most frequently used tense — master it first.
| Pronoun | Conjugation |
|---|---|
| yo | soy * |
| tú | eres * |
| él/ella/Ud. | es * |
| nosotros | somos * |
| vosotros | sois * |
| ellos/ellas/Uds. | son * |
Yo soy profesor.
I am a teacher.
Describes completed past actions with a clear start and end. Key signals: ayer, el lunes pasado, de repente.
| Pronoun | Conjugation |
|---|---|
| yo | fui * |
| tú | fuiste * |
| él/ella/Ud. | fue * |
| nosotros | fuimos * |
| vosotros | fuisteis * |
| ellos/ellas/Uds. | fueron * |
Fue un día maravilloso.
It was a wonderful day.
Describes habitual past actions, background context, and ongoing states. Key signals: siempre, normalmente, cuando era niño.
| Pronoun | Conjugation |
|---|---|
| yo | era * |
| tú | eras * |
| él/ella/Ud. | era * |
| nosotros | éramos * |
| vosotros | erais * |
| ellos/ellas/Uds. | eran * |
Cuando era niño, vivía en Madrid.
When I was a child, I lived in Madrid.
Describes future events and predictions. In everyday speech, ir a + infinitive is often preferred for planned events.
| Pronoun | Conjugation |
|---|---|
| yo | seré |
| tú | serás |
| él/ella/Ud. | será |
| nosotros | seremos |
| vosotros | seréis |
| ellos/ellas/Uds. | serán |
Mañana yo seré.
Tomorrow I will be (essential/permanent).
Expresses what would happen under certain conditions — equivalent to "would" in English. Also used for polite requests.
| Pronoun | Conjugation |
|---|---|
| yo | sería |
| tú | serías |
| él/ella/Ud. | sería |
| nosotros | seríamos |
| vosotros | seríais |
| ellos/ellas/Uds. | serían |
Si pudiera, yo sería.
If I could, I would be (essential/permanent).
Used in clauses expressing wishes, doubt, emotion, or uncertainty — typically after que. Triggers: querer, esperar, dudar, ojalá.
| Pronoun | Conjugation |
|---|---|
| yo | sea * |
| tú | seas * |
| él/ella/Ud. | sea * |
| nosotros | seamos * |
| vosotros | seáis * |
| ellos/ellas/Uds. | sean * |
Es importante que seas puntual.
It is important that you be punctual.
Used to give commands and direct requests. Affirmative and negative forms differ significantly in Spanish.
| Pronoun | Conjugation |
|---|---|
| yo | - |
| tú | sé * |
| él/ella/Ud. | sea * |
| nosotros | seamos * |
| vosotros | sed |
| ellos/ellas/Uds. | sean * |
¡Sé!
Be (essential/permanent)!
Test yourself
Type the correct conjugation for each prompt.
Example sentences
-
Yo soy profesor.
I am a teacher.
-
¿Eres de España?
Are you from Spain?
-
Ella es muy inteligente.
She is very intelligent.
-
Somos amigos desde la infancia.
We have been friends since childhood.
-
Ellos son estudiantes.
They are students.
-
Fue un día maravilloso.
It was a wonderful day.
-
Es importante que seas puntual.
It is important that you be punctual.
-
Cuando era niño, vivía en Madrid.
When I was a child, I lived in Madrid.
Common phrases with ser
- ser o no ser to be or not to be
- ser de to be from
- es decir that is to say
- sea como sea be that as it may