ser Present Subjunctive Conjugation
ser — to be
The present subjunctive of ser is irregular: sea, seas, sea, seamos, seáis, sean.
ser Present Subjunctive Forms
When to Use the Present Subjunctive
Use this after expressions of doubt, emotion, or desire (e.g., 'I want you to be happy').
Notes on ser in the Present Subjunctive
Ser is irregular here; it uses the 'sea' stem instead of the usual 's' or 'er' endings.
Example Sentences
Espero que seas feliz.
I hope that you are happy.
tú
No creo que sea verdad.
I don't think it is true.
él/ella/usted
Busco un jefe que sea amable.
I'm looking for a boss who is kind.
él/ella/usted
Common Mistakes
Mistake: Using 'sea' in the indicative.
Correct: Use 'es' for facts and 'sea' for doubts.
Why: The subjunctive is for subjective reality, not objective facts.
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Related Tenses
Present
yo: soy
The present of ser is highly irregular and essential: soy, eres, es, somos, sois, son.
Preterite
yo: fui
The preterite of ser shares the exact same forms as the verb 'ir' (to go): fui, fuiste, fue, fuimos, fuisteis, fueron.
Imperfect
yo: era
The imperfect of ser is one of only three irregular verbs in this tense: era, eras, era, éramos, erais, eran.
Future
yo: seré
The future of ser is regular: seré, serás, será, seremos, seréis, serán.
Conditional
yo: sería
The conditional of ser is regular: sería, serías, sería, seríamos, seríais, serían.
Imperfect Subjunctive
yo: fuera
The imperfect subjunctive of ser uses the 'fuer-' stem: fuera, fueras, fuera, fuéramos, fuerais, fueran.
Affirmative Imperative
yo: sé
The affirmative imperative of ser is used for commands: sé, sea, seamos, sed, sean.
Negative Imperative
yo: no seas
The negative imperative of ser uses 'no' + present subjunctive: no seas, no sea, no seamos, no seáis, no sean.