ser

to be (permanent)

Spanish Irregular

The Spanish verb "ser" means "to be (permanent)" in English. It is an irregular verb. Below you'll find the complete conjugation tables for "ser" across all 5 tenses.

Lexi
Lexi's Memory Hack

SER is a time traveller — it never follows rules. Remember "SOY, ERES, ES" by chanting: "So-y Er-es Es, it does what it wants!" The whole present tense is its own thing.

Ser and ir share the same preterite forms (fui, fuiste, fue…). Context always makes it clear which one you mean.

How to Conjugate "ser" in the Present Tense

Presente de indicativo Actions happening now or regularly
Person English Conjugation
yo I soy
you (informal) eres
él/ella/usted he/she/you (formal) es
nosotros we somos
vosotros you all (Spain) sois
ellos/ustedes they/you all son
Él es un doctor famoso.
He is a famous doctor.

How to Conjugate "ser" in the Past (completed) Tense

Pretérito perfecto simple Actions that finished in the past
Person English Conjugation
yo I fui
you (informal) fuiste
él/ella/usted he/she/you (formal) fue
nosotros we fuimos
vosotros you all (Spain) fuisteis
ellos/ustedes they/you all fueron
Él fue el ganador del juego.
He was the winner of the game.

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How to Conjugate "ser" in the Past (ongoing) Tense

Pretérito imperfecto Actions that were ongoing in the past
Person English Conjugation
yo I era
you (informal) eras
él/ella/usted he/she/you (formal) era
nosotros we éramos
vosotros you all (Spain) erais
ellos/ustedes they/you all eran
Él era mi mejor amigo.
He was my best friend.

How to Conjugate "ser" in the Future Tense

Futuro simple Actions that will happen
Person English Conjugation
yo I seré
you (informal) serás
él/ella/usted he/she/you (formal) será
nosotros we seremos
vosotros you all (Spain) seréis
ellos/ustedes they/you all serán
Él será el nuevo jefe.
He will be the new boss.

How to Conjugate "ser" in the Would (conditional) Tense

Condicional simple Hypothetical actions
Person English Conjugation
yo I sería
you (informal) serías
él/ella/usted he/she/you (formal) sería
nosotros we seríamos
vosotros you all (Spain) seríais
ellos/ustedes they/you all serían
Él sería el mejor amigo.
He would be the best friend.

Frequently Asked Questions About "ser"

Is "ser" regular or irregular in Spanish?
"Ser" is an irregular Spanish verb, meaning its conjugation does not follow standard patterns and must be memorized individually.
What does "ser" mean in English?
The Spanish verb "ser" means "to be (permanent)" in English.
How do you conjugate "ser" in the present tense?
In the present tense (Presente de indicativo): yo → soy, tú → eres, él/ella/usted → es, nosotros → somos, vosotros → sois, ellos/ustedes → son.
How many tenses does "ser" have in Spanish?
"Ser" is conjugated across 5 tenses in Spanish: Present, Past (completed), Past (ongoing), Future, Would (conditional).

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