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Ser Present Subjunctive Practice

Ser (to be (essence)) in the present subjunctive: 14 free exercises with an explanation after every answer, plus the full conjugation table.

14 exercisesIrregularB1 – B2 level
IWhat to watch for

The present subjunctive of ser is built on the irregular stem se-: sea, seas, sea, seamos, seáis, sean. You cannot derive it from the yo form soy — it is its own small paradigm that appears after triggers like espero que, ojalá, es importante que, and para que.

The biggest trap is sliding back into the indicative es or son after those triggers. If a phrase expresses wish, doubt, emotion, or purpose, ser must switch to sea and its siblings.

IIConjugation
serPresent Subjunctive
yo
sea
seas
él / ella / usted
sea
nosotros
seamos
vosotros
seáis
ellos / ustedes
sean
Fully irregular in the present, preterite, and imperfect — the forms have to be memorized.
IIIPractice exercises

Practice.

Answer first, then read the explanation. Don't skip it — that's the whole point.

Exercise 01 of 14Tag: Wishes
Fill in the blank

Espero que el clima _____ bueno para el paseo del domingo. (ser)

I hope the weather is good for Sunday's outing.

Exercise 02 of 14Tag: Influence
Fill in the blank

Mis papás quieren que yo _____ más responsable con el dinero. (ser)

My parents want me to be more responsible with money.

Exercise 03 of 14Tag: Ojalá
Fill in the blank

Ojalá que tú _____ feliz en tu nuevo trabajo. (ser)

I hope you are happy in your new job.

Exercise 04 of 14Tag: Doubt
Fill in the blank

Dudo que esos rumores _____ ciertos. (ser)

I doubt those rumors are true.

Exercise 05 of 14Tag: Requests
Fill in the blank

La maestra pide que nosotros _____ puntuales todos los días. (ser)

The teacher asks us to be punctual every day.

Exercise 06 of 14Tag: Indefinite antecedent
Fill in the blank

Busco un departamento que _____ céntrico y no muy caro. (ser)

I'm looking for an apartment that is central and not too expensive.

Exercise 07 of 14Tag: Negated belief
Fill in the blank

No creo que tú _____ capaz de despertarte a las cinco. (ser)

I don't think you are capable of waking up at five.

Exercise 08 of 14Tag: Impersonal expressions
Fill in the blank

Es importante que las instrucciones _____ claras para todos. (ser)

It's important that the instructions be clear for everyone.

Exercise 09 of 14Tag: Doubt
Fill in the blank

Mi jefa duda que yo _____ la persona adecuada para el puesto. (ser)

My boss doubts that I am the right person for the position.

Exercise 10 of 14Tag: Nosotros form
Fill in the blank

Para ganar, es necesario que nosotros _____ un equipo unido. (ser)

To win, it's necessary that we be a united team.

Exercise 11 of 14Tag: Wishes
Fill in the blank

Quiero que la fiesta _____ una sorpresa, así que no digas nada. (ser)

I want the party to be a surprise, so don't say anything.

Exercise 12 of 14Tag: Purpose clauses
Fill in the blank

Te aviso con tiempo para que tú _____ el primero en la fila. (ser)

I'm letting you know early so that you can be the first in line.

Exercise 13 of 14Tag: Ojalá
Fill in the blank

Ojalá que los boletos no _____ tan caros este año. (ser)

I hope the tickets aren't so expensive this year.

Exercise 14 of 14Tag: Wishes
Fill in the blank

Mi abuela reza para que yo _____ un buen hombre. (ser)

My grandmother prays that I will be a good man.

Every answer is explained

Not just a green check. A short paragraph telling you why.

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