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Ser Conditional Practice

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

14 exercisesIrregularB1 – B2 level
IWhat to watch for

After all the irregularity of ser — soy, fui, era, sea — the conditional is a relief: the stem is simply the infinitive, ser-, and the endings are the regular -ía, -ías, -ía, -íamos, -íais, -ían. Nothing else changes, so if you can say sería you can say every form on this page.

The trap is not the form but the meaning. Yo and él share sería, and with clock time or quantities the conditional stops being hypothetical and becomes a guess about the past: serían las tres cuando llegó means it was probably three o'clock. Compare that with the imperfect eran las tres, which states the time as fact.

IIConjugation
serConditional
yo
sería
serías
él / ella / usted
sería
nosotros
seríamos
vosotros
seríais
ellos / ustedes
serían
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: Conjecture about the past
Fill in the blank

Cuando sonó el teléfono, _____ las tres de la madrugada. (ser)

When the phone rang, it was probably three in the morning.

Exercise 02 of 14Tag: Hypothetical
Fill in the blank

Con ese horario _____ mucho más productivo por las mañanas. (ser)

With that schedule I would be much more productive in the mornings.

Exercise 03 of 14Tag: Tú form
Fill in the blank

_____ un buen profesor: explicas con muchísima paciencia. (ser)

You would make a good teacher: you explain things very patiently.

Exercise 04 of 14Tag: Future in the past
Fill in the blank

Mi madre dijo que la reunión _____ en la sala pequeña. (ser)

My mother said the meeting would be in the small room.

Exercise 05 of 14Tag: Nosotros form
Fill in the blank

Sin coche, _____ los únicos que llegarían tarde a la boda. (ser)

Without a car, we would be the only ones arriving late to the wedding.

Exercise 06 of 14Tag: Hypothetical
Fill in the blank

Sin subtítulos, esas películas _____ imposibles de seguir para mí. (ser)

Without subtitles, those films would be impossible for me to follow.

Exercise 07 of 14Tag: Polite offer
Fill in the blank

Para mí _____ un placer trabajar contigo otra vez. (ser)

It would be a pleasure for me to work with you again.

Exercise 08 of 14Tag: Tú form
Fill in the blank

¿De verdad _____ capaz de repetir eso delante de ella? (ser)

Would you really be capable of repeating that in front of her?

Exercise 09 of 14Tag: Si clause
Fill in the blank

Si aceptáramos el traslado, _____ vecinos de tus primos. (ser)

If we accepted the transfer, we would be your cousins' neighbours.

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

Un piso céntrico _____ demasiado caro para nuestro presupuesto. (ser)

A flat in the centre would be too expensive for our budget.

Exercise 11 of 14Tag: Advice
Fill in the blank

Yo no _____ tan duro con el equipo después de una temporada así. (ser)

I wouldn't be so hard on the team after a season like that.

Exercise 12 of 14Tag: Vosotros form
Fill in the blank

Vosotros _____ los primeros en enteraros si hubiera novedades. (ser)

You would be the first to know if there were any news.

Exercise 13 of 14Tag: Tú form
Fill in the blank

Con un poco más de práctica _____ el mejor del grupo. (ser)

With a little more practice you would be the best in the group.

Exercise 14 of 14Tag: Conjecture about the past
Fill in the blank

Aquellos zapatos _____ carísimos en su día. (ser)

Those shoes must have been terribly expensive back in the day.

Every answer is explained

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

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