At the intermediate level, you learned cuando, antes de que, después de que, and mientras. These four temporal conjunctions handle the majority of everyday time clauses. But Spanish has a much richer system of temporal connectors — some formal, some literary, some perfectly colloquial — that allow you to express precise temporal relationships: immediacy, near-simultaneity, the moment something happens, or repeated timing.
This page maps out the full system, paying special attention to two things that trip up advanced learners: the connectors that express "as soon as" (there are many), and the mood rules that govern when you use the indicative versus the subjunctive in temporal clauses.
Al + infinitive: upon doing
This construction means "upon doing" or "when [subject] did" and is one of the most useful temporal structures in Spanish. It is concise, elegant, and common across all registers.
Al llegar a casa, me di cuenta de que había olvidado las llaves.
Upon arriving home, I realized I had forgotten my keys.
Al abrir la puerta, encontré un paquete en el piso.
When I opened the door, I found a package on the floor.
Al enterarse de la noticia, se puso a llorar.
Upon hearing the news, she started crying.
Al terminar la reunión, todos salieron en silencio.
When the meeting ended, everyone left in silence.
Al + infinitive always refers to a completed action that serves as the temporal anchor for the main clause. It can refer to past or habitual actions, but not to future ones — for future, use cuando + subjunctive instead.
Nada más + infinitive: right after
This colloquial construction is extremely common in Latin American Spanish and means "right after" or "as soon as." It emphasizes immediacy — the two events happen in rapid succession.
Nada más terminar el examen, salí corriendo.
Right after finishing the exam, I ran out.
Nada más verla, supe que algo andaba mal.
The moment I saw her, I knew something was wrong.
Nada más + infinitive is informal and widely used in everyday speech across Mexico, Central America, and the Caribbean. It is less common in formal writing, where no bien or tan pronto como are preferred.
No bien: scarcely / as soon as (formal)
No bien expresses near-simultaneity: one event happened, and immediately — almost before it was complete — the other followed. It is formal and literary, common in journalism and narrative prose.
No bien llegó el presidente, comenzó la ceremonia.
No sooner had the president arrived than the ceremony began.
No bien terminó de hablar, estallaron los aplausos.
Scarcely had she finished speaking when applause erupted.
No bien se enteró de la noticia, llamó a su familia.
As soon as he heard the news, he called his family.
No bien takes the indicative when referring to past events (its most common use). It is rarely used for future events.
Apenas: hardly / scarcely
Apenas works similarly to no bien — it signals that the main event followed almost immediately after the temporal event. It can mean "hardly" or "scarcely" in temporal contexts.
Apenas llegó, empezó a llover.
He had barely arrived when it started raining.
Apenas había terminado de comer cuando sonó el teléfono.
I had scarcely finished eating when the phone rang.
Apenas se sentó, le trajeron el café.
He had barely sat down when they brought him coffee.
Apenas is slightly more common in everyday speech than no bien, and it works well across both formal and semiformal registers.
Tan pronto como / en cuanto: as soon as
These two conjunctions are the standard "as soon as" connectors, used across all registers. They are followed by the indicative for past/present events and the subjunctive for future events.
Tan pronto como llegó, nos avisó.
As soon as she arrived, she let us know. (past — indicative)
En cuanto termine, te llamo.
As soon as I finish, I'll call you. (future — subjunctive)
Tan pronto como pueda, te mando el informe.
As soon as I can, I'll send you the report. (future — subjunctive)
En cuanto lo vi, lo reconocí.
As soon as I saw him, I recognized him. (past — indicative)
Una vez que: once
Una vez que marks a completed event as the prerequisite for the next. It takes the indicative for past events and the subjunctive for future ones.
Una vez que entendí el problema, fue fácil resolverlo.
Once I understood the problem, it was easy to solve it. (past — indicative)
Una vez que termines el curso, recibirás un certificado.
Once you finish the course, you'll receive a certificate. (future — subjunctive)
Una vez que se firmó el acuerdo, no hubo vuelta atrás.
Once the agreement was signed, there was no going back. (past — indicative)
Mood selection: the master rule
The mood rule for temporal clauses is straightforward in principle but requires constant attention in practice:
- Past or habitual present = indicative (the event is real and occurred or occurs regularly)
- Future or hypothetical = subjunctive (the event has not happened yet)
Cuando llegó, cenamos juntos.
When he arrived, we had dinner together. (past — indicative)
Cuando llegue, cenaremos juntos.
When he arrives, we'll have dinner together. (future — subjunctive)
Mientras estaba en casa, leía el periódico.
While I was at home, I read the newspaper. (past habitual — indicative)
Mientras estés en mi casa, respeta las reglas.
While you're in my house, respect the rules. (hypothetical/future — subjunctive)
This rule applies to cuando, en cuanto, tan pronto como, una vez que, mientras, hasta que, and después de que — essentially all temporal conjunctions that can look forward or backward.
Special cases: antes de que and después de que
Antes de que always takes the subjunctive, regardless of time reference. This is because the event in the antes de que clause is always unrealized at the moment of the main event — by definition, it had not happened yet.
Salí antes de que empezara a llover.
I left before it started raining. (past — still subjunctive)
Termina antes de que llegue el jefe.
Finish before the boss arrives. (future — subjunctive)
Después de que is more flexible. In past contexts, either indicative or subjunctive is acceptable, with the indicative more common in casual speech:
Después de que terminó la película, fuimos a cenar.
After the movie ended, we went to dinner. (past — indicative, common)
Después de que terminara la película, fuimos a cenar.
After the movie ended, we went to dinner. (past — subjunctive, also correct)
In future contexts, después de que takes the subjunctive:
Después de que termine la reunión, hablamos.
After the meeting ends, we'll talk. (future — subjunctive)
Complete temporal connector table
| Connector | Meaning | Past mood | Future mood | Register |
|---|---|---|---|---|
| cuando | when | indicative | subjunctive | all |
| en cuanto | as soon as | indicative | subjunctive | all |
| tan pronto como | as soon as | indicative | subjunctive | all |
| una vez que | once | indicative | subjunctive | neutral-formal |
| no bien | no sooner...than | indicative | (rare) | formal/literary |
| apenas | scarcely/hardly | indicative | (rare) | neutral-formal |
| mientras | while | indicative | subjunctive | all |
| hasta que | until | indicative | subjunctive | all |
| antes de que | before | subjunctive | subjunctive | all |
| después de que | after | both (indic. common) | subjunctive | all |
| al + infinitive | upon | n/a (no mood) | n/a | all |
| nada más + infinitive | right after | n/a (no mood) | n/a | informal |
Common mistakes
Using indicative after cuando for future events:
Cuando llega mi mamá, le digo.
Incorrect for future meaning. Must be: Cuando llegue mi mamá, le digo.
This is one of the most common errors at all levels. If the event has not happened yet, the subjunctive is required after cuando.
Using subjunctive after apenas or no bien for past events:
No bien llegara, empezó la fiesta.
Unusual. Standard: No bien llegó, empezó la fiesta.
No bien and apenas are almost always used with past indicative. They describe events that actually happened, so the subjunctive is out of place.
Forgetting that antes de que always requires subjunctive:
Salí antes de que empezó a llover.
Incorrect. Must be: Salí antes de que empezara a llover.
Even when describing a past event, antes de que takes the subjunctive because the subordinate event was still unrealized at the moment of leaving.
Confusing al + infinitive with a + infinitive conditional:
Al llegar (upon arriving) is temporal. A juzgar por (judging by) is conditional/evaluative. The al construction always expresses timing; simple a + infinitive has a different function (see Correlative Conditionals).
Related pages
For the basic temporal conjunctions, see Temporal Conjunctions. For subjunctive in adverbial time clauses, see Adverbial Time Clauses. For absolute constructions using participles and infinitives, see Absolute Constructions.
Related Topics
- Temporal: Cuando, Mientras, Hasta queB1 — How to build time clauses in Spanish and choose between indicative and subjunctive after cuando, mientras, hasta que, and friends.
- Adverbial: Time (Cuando, Hasta que)B2 — Time conjunctions that take the subjunctive when referring to future events in Spanish.
- Absolute ConstructionsC1 — Non-finite clauses with their own subject — participial, gerundial, and infinitive absolutes used to express time, cause, and conditions in formal Spanish.
- Subordinate Clauses OverviewB1 — Learn how Spanish combines a main clause with dependent clauses using que and other connectors, and when to choose indicative or subjunctive.