The connectors that force the subjunctive (and the ones that do not)
Para que, antes de que, a menos que, sin que and con tal de que always take the subjunctive. Porque, ya que and puesto que never do. Cuando, aunque, hasta que and mientras take it only when the event has not happened yet — which is the whole principle in one line.
Draft copy. Every claim needs a native-speaker check before publishing — the byline is what makes this citable, so it has to be earned.
The principle underneath all three lists
The subjunctive is not about doubt, and it is not a tense. It marks a clause as not being asserted as fact — a purpose, a condition, something still to come, something being conceded rather than claimed.
That one idea explains every list below, which is why it is worth holding onto rather than memorising forty connectors.
Always subjunctive
These introduce something that by definition has not happened or is not being claimed, so there is no choice to make.
| Connector | Means | Example |
|---|---|---|
| para que | so that | Te lo digo para que sepas. |
| antes de que | before | Salgamos antes de que llueva. |
| a menos que | unless | No voy, a menos que vengas tú. |
| sin que | without | Se fue sin que nadie lo viera. |
| con tal de que | as long as | Te ayudo con tal de que me avises. |
| en caso de que | in case | Lleva plata en caso de que no acepten tarjeta. |
| a fin de que | in order that | more formal than para que |
Para que is the one you will use daily. Note it needs two different subjects: te lo digo para que sepas. Same subject and Spanish uses a plain infinitive — te lo digo para saber… means something else entirely.
Never subjunctive
These state a reason, which is a claim about the world.
- porque — No fui porque estaba enfermo.
- ya que, puesto que, como (meaning “since”) — Ya que estás acá, ayúdame.
- así que — Llovía, así que tomé un taxi.
The trap is para que and porque looking similar and behaving oppositely. Purpose takes the subjunctive; reason does not.
It depends — and this is the useful group
These take the subjunctive only when the event has not happened yet. Indicative for a fact or a habit, subjunctive for something pending.
cuando
- Cuando llego a casa, me baño. — habit. Indicative.
- Cuando llegué, no había nadie. — past fact. Indicative.
- Cuando llegue, te aviso. — hasn’t happened. Subjunctive.
Note llegue and llegué differ only by the accent, and they are different tenses in opposite directions. Worth reading twice.
hasta que
- Esperé hasta que llegó. — it happened.
- Espera hasta que llegue. — it hasn’t.
mientras
- Mientras estudiaba, escuchaba música. — while. Fact.
- Mientras tengas trabajo, no te preocupes. — as long as. Condition.
aunque — the concessive
This one carries real meaning, not just grammar.
- Aunque llueve, voy. — even though it’s raining. It is raining, and I am telling you so.
- Aunque llueva, voy. — even if it rains. Might, might not; I am not claiming either way.
The verb form is the only thing distinguishing “even though” from “even if”. There is no other word to swap in. This is the clearest case in the language of mood carrying the whole message, and it is why aunque is the connector worth drilling.
Same behaviour: a pesar de que, aun cuando, si bien (which leans indicative).
The quick test
When you hit one of the “it depends” connectors, ask:
Has it happened, or is it still to come?
Happened, or happens regularly → indicative. Still to come, or being conceded rather than claimed → subjunctive.
That single question covers cuando, hasta que, mientras, aunque, en cuanto, tan pronto como, después de que and siempre que.
In Peru
Nothing here is regionally distinctive, which is worth knowing: this is standard Spanish and you can learn it anywhere and use it in Lima.
Two frequency notes. Aunque in its “even if” subjunctive sense turns up constantly in the kind of hedged, non-committal talk Lima favours — the same habit behind de repente and vamos viendo. And para que is the workhorse: te aviso para que no te preocupes.
Practise
- Te llamo cuando ___ (llegar).
- Cuando ___ (ser) niño, jugaba en la calle.
- Aunque ___ (estar) cansada, salió. — she was tired, and she went out.
- No te vayas sin que te ___ (dar) la dirección.
- Lo hago porque ___ (querer), no porque me ___ (obligar).
→ 1 llegue · 2 era · 3 estaba · 4 dé · 5 quiero, obliguen.
Number 5 is a genuine trap: porque never takes the subjunctive, but no porque denies the reason rather than stating it — so the second one flips. If that felt unfair, it is the principle doing its job: the first clause is a claim, the second is a claim being refused.
Related
Topics Subjunctive
Which connectors force it
Some connectors always take the subjunctive, some never do, and the useful group changes meaning depending on which you pick.
-
1Te lo digo para que ___.
Answer
sepas — *Para que* is purpose, and a purpose is never asserted as fact, so it always takes the subjunctive. It also needs two different subjects — same subject and you would use *para saber*.
-
2No fui porque ___ enfermo.
Answer
estaba — *Porque* states a reason, which is a claim about the world, so it never takes the subjunctive. *Para que* and *porque* look alike and behave in opposite directions.
-
3Cuando ___, te aviso. (You haven't arrived yet.)
Answer
llegue — *Cuando* takes the subjunctive when the event is still to come. Note *llegue* and *llegué* differ only by the accent and point in opposite directions in time.
-
4Cuando ___ a casa, me baño. (Every day.)
Answer
llego — A habit is a fact about what you do, so *cuando* takes the indicative here. Same connector, same verb — what changed is whether the event is pending.
-
5Aunque ___ caro, lo compro. (You haven't seen the price yet.)
Answer
sea — *Aunque* plus subjunctive is “even if” — you are conceding a possibility, not reporting a price. With *es* you would be telling the listener it is expensive.
-
6Somebody tells you: *Aunque está cansada, va a salir.* What do you now know?
Answer
She is tired. — The indicative asserts it, so the tiredness is being reported as fact. *Aunque esté cansada* would leave it open, and the verb form is the only signal either way.
-
7Se fue sin que nadie lo ___.
Answer
viera — *Sin que* is always subjunctive, and the main verb is in the past, so it is the past subjunctive. *Vea* would be right only if the main clause were present.
-
8Espera acá hasta que te ___ la señora.
Answer
llame — The call has not happened, so *hasta que* takes the subjunctive. *Esperé hasta que me llamó* is the same connector with the indicative, because by then it had.