Imperfect subjunctive forms and uses

What is the imperfect subjunctive?

Short definition

The imperfect subjunctive (Spanish: pretérito imperfecto de subjuntivo) is the past form of the subjunctive mood. Use it when a subordinate clause needs the subjunctive and the main clause is in a past or conditional time frame, or when you express hypothetical, contrary-to-fact, or politely softened statements.

How it maps to English

In English it often corresponds to constructions with "were" (as in "If I were..."), or to modal / conditional meanings with "would" and "would have". Examples in English: "If I had money, I would..." and "I wished he were here." Spanish uses the imperfect subjunctive for many of these ideas: "Si tuviera dinero...", "Ojalá estuviera aquí."

When do I use the imperfect subjunctive?

General rule (sequence of tenses)

When the main clause is in a past tense (preterite, imperfect), conditional, or a past modal, and that main clause requires the subjunctive in general, the subordinate clause normally uses the imperfect subjunctive. If the subordinate action is anterior (happened before the main clause), use the pluperfect subjunctive (hubiera/hubiese + participle) instead — see examples below.

Common contexts and examples

1) After verbs of desire, requests, influence, emotion, or doubt when the main verb is past or conditional

- Quería que vinieras. / Quería que vinieses.
(I wanted you to come.)

- Me pidió que lo hiciera. / Me pidió que lo hiciese.
(He asked me to do it.)

- El profesor recomendó que estudiáramos. / El profesor recomendó que estudiásemos.
(The teacher recommended that we study.)

- Si tuviera dinero, compraría una casa. / Si tuviese dinero, compraría una casa.
(If I had money, I would buy a house.)

- Si yo fuera tú, no lo haría. / Si yo fuese tú, no lo haría.
(If I were you, I wouldn't do it.)

- Me miró como si no me conociera. / Me miró como si no me conociese.
(He looked at me as if he didn't know me.)

- Ojalá lloviera mañana. / Ojalá lloviese mañana.
(I wish it would rain tomorrow.)

- ¡Ojalá fuera posible! / ¡Ojalá fuese posible!
(I wish it were possible.)

- Quisiera hablar con el director. / Quisiese hablar con el director.
(I would like to speak with the director.)

- Quisiera que me ayudara. / Quisiese que me ayudase.
(I would like him/her to help me.)

- Ayer me dijeron que cerraras la puerta. / Ayer me dijeron que cerrases la puerta.
(Yesterday they told me to close the door.)

- Era importante que llegaras a tiempo. / Era importante que llegases a tiempo.
(It was important that you arrive on time.)

How do I form the imperfect subjunctive?

Step-by-step formation

1) Take the third-person plural of the preterite (ellos/ustedes). Examples: hablaron, comieron, vivieron.

2) Remove the ending -ron: habla-, comie-, vivie-.

3) Add one of two sets of endings (both series are valid):

- "-ra" series: -ra, -ras, -ra, -ramos, -rais, -ran
- "-se" series: -se, -ses, -se, -semos, -seis, -sen

Examples for regular verbs (full forms)

Hablar (hablaron):
- hablara, hablaras, hablara, habláramos, hablarais, hablaran
- hablase, hablases, hablase, hablásemos, hablaseis, hablasen

Comer (comieron):
- comiera, comieras, comiera, comiéramos, comierais, comieran
- comiese, comieses, comiese, comiésemos, comieseis, comiesen

Vivir (vivieron):
- viviera, vivieras, viviera, viviéramos, vivierais, vivieran
- viviese, vivieses, viviese, viviésemos, vivieseis, viviesen

Note on the nosotros (we) forms

The nosotros forms normally carry a written accent (habláramos, hablásemos; comiéramos, comiésemos; viviéramos, viviésemos). The accent marks the stressed vowel and preserves correct pronunciation.

-ra vs -se: Are both forms the same?

Meaning and interchangeability

In most contexts the two series (-ra and -se) are interchangeable and mean the same thing. The difference is stylistic and regional rather than grammatical:

- The -ra forms are more common in everyday speech in many regions (both in Latin America and in Spain).
- The -se forms are often perceived as more formal, literary, or old-fashioned; they still appear in written and formal registers.

In practice, choose -ra for spoken and neutral registers and -se when you want a slightly more formal or literary tone — but either is grammatically correct in nearly all situations.

Pairs that show interchangeability

- Si yo fuera rico... / Si yo fuese rico... (If I were rich...)
- Quisiera hablar con usted. / Quisiese hablar con usted. (I would like to speak with you.)
- Hizo como si no lo supiera. / Hizo como si no lo supiese. (He acted as if he didn't know it.)

Examples grouped by use (many paired forms)

Past requests, wishes, influence

- Quería que vinieras. / Quería que vinieses. — I wanted you to come.
- Me pidió que lo hiciera. / Me pidió que lo hiciese. — He asked me to do it.
- El director insistió en que firmáramos. / El director insistió en que firmásemos. — The director insisted that we sign.

Conditional / hypothetical (si + imperfect subjunctive)</b]

- Si tuviera dinero, viajaría por el mundo. / Si tuviese dinero, viajaría por el mundo. — If I had money, I would travel the world.
- Si ella fuera honesta, lo diría. / Si ella fuese honesta, lo diría. — If she were honest, she would say it.

Como si (as if) — unreal comparisons

- Él hablaba como si lo supiera todo. / Él hablaba como si lo supiese todo. — He spoke as if he knew everything.
- Actuó como si no le importara. / Actuó como si no le importase. — He acted as if he didn't care.

Ojalá (wishes) — improbable or contrary-to-fact wishes</b]

- Ojalá lloviera esta tarde. / Ojalá lloviese esta tarde. — I wish it would rain this afternoon.
- Ojalá fuera más fácil. / Ojalá fuese más fácil. — I wish it were easier.

Politeness and softened requests</b]

- Quisiera un poco de ayuda. / Quisiese un poco de ayuda. — I would like some help.
- Quisiera que me explicaran el problema. / Quisiese que me explicasen el problema. — I would like them to explain the problem to me.

Reported speech and past main clauses</b]

- El jefe mandó que llegáramos temprano. / El jefe mandó que llegásemos temprano. — The boss ordered that we arrive early.
- Me dijeron que no lo hicieras. / Me dijeron que no lo hicieses. — They told me not to do it.

Anteriority: when to use pluperfect subjunctive instead</b]

Use the pluperfect subjunctive (hubiera/hubiese + past participle) if the subordinate action occurred before the past moment of the main clause.

- Quería que vinieras. (I wanted you to come — desire referring to an action simultaneous or subsequent to that past wanting.)
- Quería que hubieras venido. (I wanted you to have come — the coming would have happened before the past wanting; often implies it didn’t happen.)

- Esperaba que llegara a tiempo. / Esperaba que hubiese llegado a tiempo. — I hoped he would arrive on time. / I hoped he had arrived on time (but maybe he hadn't).

Common mistakes to avoid

- Using the present subjunctive when the main clause is past:
* Wrong: "Ella dijo que venga." — Correct: "Ella dijo que viniera." or "Ella dijo que viniese." (She said that he should come / he came — depending on context.)

- Using indicative instead of subjunctive in counterfactual si-clauses:
* Wrong: "Si yo era rico..." — Correct: "Si yo fuera rico..." (If I were rich...)

- Confusing imperfect subjunctive with pluperfect subjunctive (timeline error):
* Know whether the subordinate action is simultaneous/later or earlier than the main clause.

- Forgetting accents on nosotros forms: write habláramos / hablásemos, comiéramos / comiésemos, viviéramos / viviésemos.

- Expecting dramatic meaning differences between -ra and -se: for most learners, pick one series (many choose -ra) and use it consistently; both are correct.

Short glossary (simple definitions)</b]

Subjunctive — a mood used for wishes, doubt, emotion, requests, and hypothetical or non-factual statements.

Imperfect — a past tense that can show habitual or ongoing past action; here it means the past form of the subjunctive.

Pluperfect subjunctive — formed with hubiera/hubiese + past participle; used when the subordinate action is anterior to the past main clause.

Main clause / subordinate clause — the main clause contains the primary verb and timeframe; the subordinate (dependent) clause is the one that often takes the subjunctive.

-ra / -se series — two equivalent sets of imperfect-subjunctive endings. Both are correct; -ra is more common in speech, -se is more literary or formal.

Practical tips

- Learn the formation rule (3rd-person plural preterite minus -ron + endings). Memorize common irregular stems (fue-, tuvie-, dij- , vin-, etc.).
- For speaking, favor the -ra series (it is more widely used). You will be understood with either series.
- Pay attention to the timeline: use imperfect subjunctive for simultaneous or future-in-the-past actions; use the pluperfect subjunctive (hubiera/hubiese + participle) for actions anterior to the past.
- Watch the accent on the nosotros forms.

If you want, I can provide a short list of irregular stems and their imperfect-subjunctive forms, or extra example sentences tailored to the verbs you use most.