Imperfect Subjunctive in Spanish: -ra vs -se, How to Form It and When You Actually Need It

Why hablara and hablase are the same word, which one to say in Spain, how the tense grows out of the simple past, and the three places where the ending is not a free choice.

Tuesday evening, the WhatsApp group of your building. The presidenta of the comunidad de vecinos (the owners' association that runs the building) writes: Si todos pagásemos la cuota a tiempo, no tendríamos este problema con el ascensor (if we all paid the fee on time, we wouldn't have this problem with the elevator). Twenty minutes later the neighbor from the second floor answers: Si pagáramos a tiempo, ya, pero el administrador tampoco avisa (if we paid on time, sure, but the property manager doesn't send reminders either). Same verb, same meaning, two endings, and not one neighbor blinks. The elevator, for the record, stays broken for another week.

There is no trick hiding in that exchange. In the imperfect subjunctive the two endings mean exactly the same thing, and Spaniards switch between them without noticing. The ending is the easy part. The trigger, the word that calls for the tense in the first place, is where people slip.

Two endings, one tense

Hablara and hablase, tuviera and tuviese, fuera and fuese: in any sentence that calls for the imperfect subjunctive you can swap one for the other, and no grammar, the Real Academia's included, will mark it wrong. It is the next step after the present subjunctive we covered in the first-steps guide, and Aula Internacional, the textbook on most academy desks in Spain, gives both endings in one table.

What differs is frequency. Across the Spanish-speaking world -ra dominates speech; in most of Latin America -se has nearly left the conversation. Spain is where -se is still in daily use: you hear it from the same person who said -ra a minute earlier, you read it in El País and in the letter from the ayuntamiento about the new tasa de basuras (the waste-collection fee), and your casera (landlady) types si pudieses in a message about the plumber without thinking twice.

No one will correct you for either. Our students at How2Spanish usually meet -se for the first time in a reading, ask whether it is a typo, and from then on simply hear it as -ra. That is the right reflex, and it is exactly what a Spaniard does.

Building the form from a tense you already have

The imperfect subjunctive is built on the third person plural of the pretérito indefinido, the ellos form of the simple past. Take it, drop -ron, add the endings.

Every irregularity of the indefinido comes along, so there is nothing to learn twice: hicieron → hiciera, dijeron → dijera, pudieron → pudiera, quisieron → quisiera, supieron → supiera, and the auxiliary haber gives hubiera. Fueron serves both ser and ir, exactly as in the indefinido, so como si fuera fácil (as if it were easy) and la gestora me pidió que fuera a Hacienda con el modelo 030 (the woman at the gestoría, the paperwork agency, asked me to go to the tax office with form 030) are one and the same form.

The nosotros form carries a written accent, habláramos, tuviésemos, because the stress sits three syllables from the end. And the first and third person singular are identical, yo tuviera and ella tuviera, so Spanish keeps the pronoun where it would otherwise drop it: quería que ella viniera a la cita de Extranjería (I wanted her to come to the immigration appointment), not just quería que viniera, when it matters who.

If the indefinido stems are not solid yet, fix that first. Our indefinido vs imperfecto walkthrough lays out the irregular stems, and they are the same stems.

Where you will need it in Spain this week

The present subjunctive has one job: it goes after a trigger, quiero que, es importante que, para que. The imperfect does the same job when the main verb sits in the past or the conditional.

Most often it is somebody's request or instruction in the past. La profesora de la EOI nos pidió que escribiéramos un correo formal (the teacher at the Escuela Oficial de Idiomas asked us to write a formal email). El del banco me dijo que trajera el certificado de empadronamiento (the man at the bank told me to bring the padrón certificate). Mi casera quería que le avisara con un mes de antelación (my landlady wanted me to give her a month's notice). She was within her rights, by the way; the LAU, the rental law, sets that notice at 30 days. A present trigger takes the present subjunctive, a past trigger takes the imperfect. The pairing is called correlación de tiempos, and in Spain it is strict: me pidió que traiga is heard, but it marks you as a learner within one sentence.

The use you need most is the one from the WhatsApp chat: si + imperfect subjunctive, then the conditional. Si tuviera un bajo en el Cabanyal, pondría un bar (if I had a ground-floor commercial space in the Cabanyal, Valencia's old fishermen's quarter by the beach, I'd open a bar). Si el metro llegara al aeropuerto a las cinco de la mañana, nadie cogería un taxi (if the metro reached the airport at five in the morning, nobody would take a taxi). The trap is the English habit of putting would in both halves. Si tendría is not standard Spanish. Si takes the subjunctive, the result takes the conditional, and the two never trade places.

You will hear si tendría all the same in the Basque Country, in Bilbao on every corner, and in Navarre and La Rioja, where it is a known regional habit. Enjoy it there; don't copy it.

Como si is followed by the imperfect subjunctive, or by the pluperfect, hubiera plus participle, and never by the indicative, whatever tense the rest of the sentence is in. El inquilino habla del piso como si fuera suyo (the tenant talks about the apartment as if it were his) is a landlord's classic complaint. El de la gestoría me miró como si yo no entendiera nada (the man at the gestoría looked at me as if I didn't understand a thing) is the tenant's; the yo is not padding, without it the sentence could also mean he was the one not understanding.

Then there are the wishes you don't expect to come true. Ojalá with the present subjunctive hopes; ojalá with the imperfect sighs. Ojalá abran la piscina municipal en mayo is a real hope for this year. Ojalá abrieran la piscina en mayo is what you say in a city where it opens in mid-June every single year. Me gustaría que works the same way, because the conditional in gustaría pulls the imperfect along: me gustaría que vinieras a la cena de Fallas (I'd like you to come to the Fallas dinner, the one in March when the whole street eats outside).

Where the choice between -ra and -se does matter

When the ending is not a free choice, it is -ra that wins. On the phone you already use it. Quisiera pedir cita para el empadronamiento (I'd like to book an appointment for the padrón) to the ayuntamiento, quisiera dar de baja la línea (I'd like to cancel the line) to Movistar: fixed courtesy phrases, and quisiese in that role is not something you will hear. The same goes for debiera used to soften, debieras descansar (you really ought to rest). We lined quisiera up against quería and ¿me pones…? in quería, quisiera or me pones; the point here is narrower. The softening belongs to -ra alone.

In print, -ra does something else entirely. Spanish journalism uses it as a formal past tense with no subjunctive meaning at all. La que fuera alcaldesa de Valencia durante 24 años means "the woman who was mayor of Valencia for 24 years", nothing hypothetical about it. It is a leftover of the form's Latin origin, it belongs to writing, and -se cannot do it, because la que fuese alcaldesa would be read as a genuine supposition. You are not expected to write like that. Reading it without stumbling is enough, so that a headline does not land as a conditional.

And in a past if, the result half tilts the same way. Take si hubiera pedido la cita antes, habría llegado a tiempo a Extranjería (if I had booked the appointment earlier, I would have made it to the immigration office in time). Spaniards routinely swap the second verb for hubiera llegado, and the Real Academia's Diccionario panhispánico de dudas allows it; the -se form in that half it rules out.

Anywhere else, free choice. Pick one and stay with it inside a sentence; si tuviera tiempo y pudiese is not wrong, but the mixture reads as hesitation.

One sentence to keep: -ra and -se are one tense with two endings; say -ra, read -se, and watch the trigger, because that is where the real mistakes happen.

Check yourself: where does the imperfect subjunctive go?

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