01 · Purpose — no other option
Te lo explico para que entiendas.
I'm explaining it so that you understand.
Para que never takes the indicative, in any tense. Entiendas is the only option once para que shows up.
andbefluent.com/spanish/clause-master
Clause Master
Link purpose, timing and conditions with the right mood — and say it out loud.
Some Spanish conjunctions always take the subjunctive: para que, antes de que, sin que, a menos que — Te lo explico para que entiendas, Vámonos antes de que llueva. Others are chameleons: cuando, hasta que and en cuanto take subjunctive for a future event (Cuando llegue a casa, te llamo) but indicative for a past or habitual one (Cuando llegaba a casa, siempre cenaba). The rule of thumb: hasn't happened yet or uncertain = subjunctive; fact or habit = indicative. One more switch worth knowing — aunque llueva means even if, aunque llueve means even though.
Below: the conjunctions sorted by rule, what locals actually say, the traps that flip your meaning — and how you make it automatic by talking, not by filling in blanks.
The warm-up pack
The conjunctions that force the subjunctive no matter what — plus the ones that only sometimes do.
01 · Purpose — no other option
Te lo explico para que entiendas.
I'm explaining it so that you understand.
Para que never takes the indicative, in any tense. Entiendas is the only option once para que shows up.
02 · Purpose, more formal
Hablé despacio a fin de que me entendieran.
I spoke slowly so that they would understand me.
A fin de que does the exact same job as para que — always subjunctive — it just sounds a notch more formal.
03 · Before it happens — always
Vámonos antes de que llueva.
Let's go before it rains.
Antes de que is one of the fixed ones. It doesn't care whether it's raining now, later, or never — always subjunctive.
04 · Unless — always subjunctive
Iré a menos que llueva.
I'll go unless it rains.
A menos que is a hard rule, not a maybe. Whatever follows it is always subjunctive.
05 · Provided that — always
Te presto el coche con tal de que lo cuides.
I'll lend you the car provided you take care of it.
Con tal de que sets a condition, and like the others in this group, it locks in the subjunctive no matter the tense.
06 · Without anyone noticing — always
Salió sin que nadie lo viera.
He left without anyone seeing.
Sin que describes something happening unnoticed — and it's one more conjunction that's always subjunctive, full stop.
07 · Cuando, but this one's a chameleon
Cuando llegue a casa, te llamo.
When I get home, I'll call you.
Cuando isn't in the always-subjunctive group — it only takes it here because llegue hasn't happened yet.
08 · Same word, now it's a fact
Cuando llegaba a casa, siempre cenaba.
When I got home, I always had dinner.
Same word, same sentence shape, but now it's describing a routine that already happened — llegaba stays indicative.
09 · Hasta que, already over
Esperé hasta que llegó.
I waited until he arrived.
Hasta que follows the same logic as cuando — the event's already over, so it's plain indicative: llegó.
10 · Aunque, might rain
Aunque llueva, iremos a la playa.
Even if it rains, we'll go to the beach.
Llueva means the rain is still just a possibility. Aunque with the subjunctive always signals "even if", not "even though".
11 · Aunque, it's already raining
Aunque llueve, vamos a la playa.
Even though it's raining, we're going to the beach.
Llueve here is a fact — it's raining right now — so aunque takes the indicative and means "even though".
FLUENT
Finally, someone to talk to in Spanish.
Ten-minute spoken lessons. A teacher who answers back — and gently fixes what you got wrong.
First 10 lessons freeandbefluent.com/spanish/clause-masterRegional Spanish
Textbooks teach one word. Locals use several — pick your region's and stay consistent.
| English | Mexico | Argentina |
|---|---|---|
| as soon as | apenas | ni bien |
| car | el carro | el auto |
| so that (fast casual speech) | pa' que | para que |
Watch out
The part no drill site can do
Carla
Your grammar teacher for this pack
No worksheets, no clause-completion exercises — in the Clause Master lessons you build these sentences out loud while Carla listens. She runs the aunque flip with you: aunque llueve (it IS raining) versus aunque llueva (it might) — same verb, you say one of each. Then she asks about your week, and you catch yourself needing cuando llegue, not cuando llego, mid-sentence — which is exactly where this grammar actually lives.
Blank mid-sentence and nothing bad happens — she waits. That's the practice, without unnecessary judgement.
Finish the 6 lessons and Clause Master is yours — earned, not given.
First 10 lessons free · 10-minute spoken lessons · your AI coaching team remembers you
Quick answers
Yes — always, in any tense: Te lo explico para que entiendas. The exception is when both verbs share a subject: then drop que and use the infinitive — Estudio para aprender, but Te ayudo para que aprendas.
When it points at the future: Cuando llegue a casa, te llamo. For past events or habits it takes the indicative: Cuando llegaba a casa, siempre cenaba. The same rule covers hasta que, en cuanto and tan pronto como.
Aunque llueva, iremos a la playa = even if it rains (uncertain). Aunque llueve, vamos a la playa = even though it's raining (known fact). The mood is what carries the meaning.
Yes — antes de que always triggers the subjunctive, whatever the tense: Vámonos antes de que llueva now, Salí antes de que empezara la tormenta in the past.
A menos que + subjunctive: Iré a menos que llueva. In everyday Latin American speech you'll also hear salvo que — Voy, salvo que llueva — which works the same way. Related: con tal de que (provided that) and en caso de que (in case): Lleva paraguas en caso de que llueva.