Spanish uniquely offers two full sets of imperfect subjunctive endings. Learners often wonder: which one should I use? The short answer for Latin America is almost always -ra. But the two sets do have distinct flavors, and in one special case they are not interchangeable.
The Default Answer: Use -Ra
In Latin American Spanish, the -ra forms dominate in:
- Everyday conversation (effectively 100% of the time).
- News broadcasts and journalism.
- Informal and semi-formal writing.
- Textbooks and academic work.
If you only learn one set, learn -ra. You will never sound wrong using it.
Where -Se Still Lives
The -se forms persist in specific registers:
- Literary prose — novels and short stories, especially older ones.
- Legal language — statutes and contracts.
- Peninsular Spanish — speakers from Spain use -se far more often.
- Poetry — for rhythm and style.
This sentence sounds slightly bookish in Mexico or Argentina, but it is perfectly correct.
Register Comparison
| Context | -Ra | -Se |
|---|---|---|
| Casual speech | Very common | Rare |
| News / journalism | Very common | Occasional |
| Literary writing | Common | Common |
| Legal / formal | Common | Common |
| Peninsular speech | Common | Common |
The One Exception: -Ra for the Conditional
Here is the only place the two forms are not interchangeable. The -ra form can substitute for the conditional in certain fixed expressions and in literary Spanish. The -se form cannot.
The most famous case is the polite quisiera (I would like), which is used instead of the conditional querría.
Quisiera un café, por favor.
I would like a coffee, please.
Here quisiera is technically the imperfect subjunctive of querer, but it functions exactly like a conditional. Replacing it with quisiese is not idiomatic — that sentence would sound strange.
Pudiera ser verdad.
It could be true.
Again, pudiera replaces the conditional podría. Pudiese would not work here.
Literary "Hubiera"
In older or more literary Spanish, you will also find the -ra form replacing the conditional perfect:
Hubiera preferido quedarme.
I would have preferred to stay.
This is equivalent to habría preferido and is extremely common in novels and film dialogue. The -se equivalent (hubiese preferido) is grammatical, but it feels more old-fashioned.
Side-by-Side Practice
Si fuera rico, compraría una isla.
If I were rich, I would buy an island.
Si fuese rico, compraría una isla.
If I were rich, I would buy an island.
Both sentences mean exactly the same thing. A Latin American listener will perceive the first as neutral and the second as a touch literary.
Revisit the -ra forms or see how these forms work in polite requests.
Related Topics
- Imperfect Subjunctive: -Ra FormsB2 — Learn how to form the imperfect subjunctive using the -ra endings, the most common form in Latin American Spanish.
- Imperfect Subjunctive: -Se FormsB2 — Learn the alternative -se endings of the imperfect subjunctive, more common in literary and peninsular Spanish.
- Quisiera, Pudiera (Polite Forms)B2 — The imperfect subjunctive of querer and poder is used to make polite requests that are softer than the conditional.