Future Subjunctive vs Present Subjunctive: Choosing the Right One | Portuguese (Portugal) Grammar

Once you know that European Portuguese has both a present subjunctive (que eu fale, que tu venhas) and a future subjunctive (se eu falar, quando tu vieres), the natural question becomes: when do I use which? Most learners try to answer this by thinking about time — future events take the future subjunctive, present events take the present subjunctive. That answer is wrong. The choice between the two is syntactic, not temporal: it depends on what kind of trigger introduced the subjunctive in the first place. This page is the synthesis that pulls the future-subjunctive unit together; if you internalise the logic here, you will pick the right mood reflexively in every context.

The central insight: triggers decide, not time

The crucial thing to understand is that the choice between present and future subjunctive is determined by the grammatical trigger, not by whether the event is in the future. Many triggers (quero que, embora, talvez) only ever take the present subjunctive, even when the event is explicitly future. Other triggers (quando, se, assim que, logo que) only ever take the future subjunctive, when the event is future.

This is the single most important fact on this page. A learner who asks "is this event in the future?" will get the wrong answer half the time. The right question is: "what trigger introduced this subjunctive?"

Trigger type	Examples	Mood required
Volition / wish	quero que, espero que, prefiro que, peço que	present subjunctive (always)
Emotion	tenho medo que, fico contente que, é pena que	present subjunctive (always)
Doubt / denial	duvido que, não acho que, é impossível que	present subjunctive (always)
Impersonal evaluation	é importante que, é possível que, é bom que	present subjunctive (always)
Concession	embora, ainda que, mesmo que, nem que	present subjunctive (always)
Negative / exceptional	sem que, antes que, a menos que, caso	present subjunctive (always)
Adverbs: talvez, possivelmente	talvez ele venha, possivelmente chegue	present subjunctive
Indefinite noun antecedent	alguém que saiba, uma casa que tenha	present subjunctive
Temporal (future)	quando, assim que, logo que, enquanto, sempre que	future subjunctive
Conditional (open)	se (future open conditional)	future subjunctive
Indefinite free relative	quem, o que, onde, como, conforme (future reference)	future subjunctive

The first eight rows — the big volume of Portuguese subjunctive triggers — never take the future subjunctive. Only the last three do. This is the asymmetry that English speakers consistently miss.

The critical minimal pair: espero que chegues vs. quando chegares

Look at these two sentences. Both refer to your future arrival. Both use the subjunctive. But they use different subjunctives.

Espero que chegues cedo.

I hope you arrive early. (present subjunctive after 'espero que')

Quando chegares cedo, ligamos aos pais.

When you arrive early, we'll call the parents. (future subjunctive after 'quando')

Both events are in the future. Both verbs are subjunctive. But:

Espero que is a volition trigger — it always takes the present subjunctive (chegues).
Quando referring to a future event is a temporal trigger — it always takes the future subjunctive (chegares).

The tense is dictated by the trigger. Time has nothing to do with it.

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The mental heuristic: present subjunctive is the default subjunctive — used for attitudes, evaluations, concessions, and negated beliefs. Future subjunctive is a narrowly specialised subjunctive — reserved for exactly three families: time conjunctions (quando, assim que...), open conditionals (se), and indefinite free relatives (quem, o que, onde without a noun antecedent).

Systematic contrast: each trigger type

Let's walk through each trigger type and nail down which subjunctive it wants — with examples pointing at the same future event where possible.

Volition (wishes, requests) — always present subjunctive

Quero que venhas amanhã.

I want you to come tomorrow. (present subj. — even though 'tomorrow' is future)

Espero que tenhas uma boa viagem.

I hope you have a good trip. (present subj. — the trip is future)

Peço-te que não faças barulho.

I'm asking you not to make noise. (present subj.)

Notice: amanhã ("tomorrow") is explicitly future, but the subjunctive is present (venhas), not future (vieres). The trigger quero que forces the present subjunctive regardless of when the event happens.

Emotion — always present subjunctive

Tenho medo que chova amanhã.

I'm afraid it will rain tomorrow. (present subj., future event)

Fico contente que venhas à festa no sábado.

I'm glad you're coming to the party on Saturday. (present subj., future event)

É pena que percas o concerto.

It's a shame you'll miss the concert. (present subj., future event)

Doubt and denial — always present subjunctive

Duvido que ele venha amanhã.

I doubt he'll come tomorrow. (present subj., future)

Não acho que chova hoje à noite.

I don't think it'll rain tonight. (present subj., future)

É impossível que ela termine até sexta.

It's impossible for her to finish by Friday. (present subj., future)

Impersonal evaluation — always present subjunctive

É importante que estejas presente amanhã.

It's important that you be there tomorrow. (present subj., future)

É possível que chova no fim de semana.

It's possible it'll rain over the weekend. (present subj., future)

É bom que chegues cedo.

It's good for you to arrive early. (present subj., future)

Concession — always present subjunctive

Embora chova amanhã, vamos à praia.

Even if it rains tomorrow, we'll go to the beach. (present subj., future)

Mesmo que cheguem tarde, esperamos.

Even if they arrive late, we'll wait. (present subj., future)

Ainda que peças desculpa, não te perdoo.

Even if you apologise, I won't forgive you. (present subj., hypothetical future)

Negative / exceptional conjunctions — always present subjunctive

Fecha a porta antes que ele chegue.

Close the door before he arrives. (present subj. after 'antes que')

Podes ficar, a menos que queiras sair.

You can stay, unless you want to leave. (present subj.)

Leva o guarda-chuva, caso chova.

Take the umbrella in case it rains. (present subj. after 'caso')

Talvez, possivelmente — always present subjunctive

Talvez ele venha jantar connosco amanhã.

Maybe he'll come to dinner with us tomorrow. (present subj., future)

Possivelmente acabemos o trabalho na sexta.

Possibly we'll finish the work on Friday. (present subj., future)

Indefinite noun antecedents — always present subjunctive

Procuro alguém que saiba grego.

I'm looking for someone who knows Greek. (present subj., hypothetical person)

Queremos uma casa que tenha jardim.

We want a house that has a garden. (present subj., hypothetical house)

In all eight cases above, the event may be in the future — but the trigger dictates the present subjunctive. The future subjunctive is not an option.

Now the three future-subjunctive triggers

Temporal conjunctions (future): quando, assim que, logo que, enquanto, sempre que, mal, depois que, conforme.

Quando chegares, manda mensagem.

When you arrive, send a message.

Assim que souberes, avisa.

As soon as you know, let me know.

Logo que puder, passo aí.

As soon as I can, I'll drop by.

Open conditional with se.

Se tiveres tempo, passa cá.

If you have time, drop by.

Se puderes, vem cedo.

If you can, come early.

Indefinite free relatives (quem, o que, onde, como, conforme with no noun antecedent).

Faz como quiseres.

Do as you wish.

Vai onde te apetecer.

Go wherever you feel like.

Quem chegar primeiro, ganha.

Whoever arrives first wins.

These are the only three trigger types that take the future subjunctive. Everything else takes the present subjunctive (or the indicative).

The aha moment: same verb, two moods, two triggers

Here is the clearest illustration. Watch the same verb (chegar, vir, estar) appear in two subjunctives depending on which trigger introduces it.

Espero que chegues cedo.

I hope you arrive early. (espero que → present subj. 'chegues')

Quando chegares cedo, vamos passear.

When you arrive early, we'll go for a walk. (quando → future subj. 'chegares')

Duvido que ele venha.

I doubt he'll come. (duvido que → present subj. 'venha')

Se ele vier, jantamos cá.

If he comes, we'll have dinner here. (se → future subj. 'vier')

Embora estejas cansado, vamos tentar.

Even though you're tired, we'll try. (embora → present subj. 'estejas')

Enquanto estiveres cansado, descansa.

While you're tired, rest. (enquanto → future subj. 'estiveres')

Each pair uses the same verb, in the same time reference (the future), but a different subjunctive form — because a different trigger introduced the clause. The trigger decides. This is the synthesis.

The tricky boundary: quando in reported speech

One subtlety worth flagging. When quando appears in reported speech referring to a future-in-the-past ("he said when he got there...") — a situation that was future at the time of speaking but is now past — Portuguese uses the imperfect subjunctive, not the future subjunctive.

Ele disse que me ligava quando chegasse.

He said he'd call me when he arrived. (imperfect subj. 'chegasse' — future-in-past)

A Ana pediu-nos que esperássemos até que ela voltasse.

Ana asked us to wait until she came back. (imperfect subj.)

This is the sequence-of-tenses rule: if the main clause is in the past, the subordinate subjunctive shifts to the imperfect (or pluperfect) subjunctive. The future subjunctive doesn't survive into a past-tense sequence.

Present sequence (speaker in the now, event future) → future subjunctive: Ele diz que me liga quando chegar. Past sequence (speaker in the past, event future-at-that-time) → imperfect subjunctive: Ele disse que me ligava quando chegasse.

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A useful framing: the future subjunctive is the subjunctive of real-time future planning. If you shift the frame of reference to the past — reporting what someone said, narrating a past scenario — the future subjunctive reverts to the imperfect subjunctive. The future-ness of the event is preserved inside the past frame by a different tense.

Side-by-side: every trigger in a single table

Here is the full picture. Use this as your reference when you are stuck.

Trigger	Subjunctive required	Example
quero que, espero que, prefiro que	present subj.	Quero que venhas.
duvido que, não acho que	present subj.	Duvido que venha.
tenho medo que, é pena que	present subj.	Tenho medo que chova.
é importante / possível / bom que	present subj.	É importante que chegues cedo.
embora, ainda que, mesmo que	present subj.	Embora esteja cansado, vou.
para que, a fim de que	present subj.	Explico para que percebas.
sem que, antes que, a menos que, caso	present subj.	Fecha antes que chova.
até que	present subj.	Espera até que chegue.
talvez, possivelmente	present subj.	Talvez venha.
alguém / algum X que (hypothetical noun)	present subj.	Procuro alguém que saiba.
quando, assim que, logo que, enquanto, sempre que, mal, depois que, conforme (future)	future subj.	Quando chegares, liga.
se (open conditional)	future subj.	Se tiveres tempo, vem.
quem, o que, onde, como, conforme, quanto (indefinite free relative, future reference)	future subj.	Vai onde quiseres.
Past-tense sequence (reported speech, past narration)	imperfect subj.	Disse que vinha quando pudesse.

Decision procedure

When you have to pick a subjunctive tense, walk this list top to bottom. The first match wins.

Is the main clause in the past? → use imperfect subjunctive (sequence of tenses), regardless of trigger type.
Is the trigger a temporal conjunction (quando, assim que, logo que, enquanto, sempre que, mal, depois que, conforme, até) referring to a future event? → future subjunctive.
Is the trigger se in an open conditional (a live future possibility)? → future subjunctive.
Is the trigger a bare indefinite relative (quem, o que, onde, como, conforme, quanto) with no specific noun antecedent and future reference? → future subjunctive.
Is the trigger anything else — volition, emotion, doubt, impersonal judgment, concession, exception, adverb talvez/possivelmente, indefinite noun antecedent (alguém que, uma casa que), or the conjunction até que? → present subjunctive.
Is the event a hypothetical present (se tivesse) or a counterfactual past? → imperfect subjunctive or pluperfect subjunctive (see the conditional sentences page).

A dialogue that hits every trigger type

Two colleagues planning a weekend.

— Espero que venhas ao jantar de sábado.

I hope you'll come to dinner on Saturday. (volition → present subj.)

— Se puder, vou. Não tenho a certeza.

If I can, I'll come. I'm not sure. (open conditional → future subj.)

— Quando souberes, diz-me.

When you know, tell me. (temporal future → future subj.)

— Está bem. Talvez saiba na quinta.

OK. Maybe I'll know by Thursday. (talvez → present subj.)

— Mesmo que não venhas, reservo lugar.

Even if you don't come, I'll save a spot. (concession → present subj.)

— Faz como quiseres. Eu agradeço.

Do as you wish. I'm grateful. (indefinite free relative → future subj.)

— Duvido que chegue tarde.

I doubt I'll be late. (doubt → present subj.)

— Assim que chegares, manda mensagem.

As soon as you arrive, send a message. (temporal future → future subj.)

Count the triggers: espero que, se, quando, talvez, mesmo que, como (free relative), duvido que, assim que. Eight triggers, four present subjunctives, four future subjunctives. The rule decides each case.

Common mistakes

The errors here cluster into two categories: using the future subjunctive where a regular trigger demands the present, and using the present subjunctive where a temporal / conditional / free-relative trigger demands the future.

❌ Quero que vieres amanhã.

Incorrect — 'quero que' takes the present subjunctive, even for future events.

✅ Quero que venhas amanhã.

I want you to come tomorrow.

❌ Duvido que ele vier.

Incorrect — 'duvido que' takes the present subjunctive.

✅ Duvido que ele venha.

I doubt he'll come.

❌ Embora estiveres cansado, trabalha.

Incorrect — 'embora' takes the present subjunctive.

✅ Embora estejas cansado, trabalha.

Although you're tired, work.

❌ Talvez ele vier amanhã.

Incorrect — 'talvez' takes the present subjunctive.

✅ Talvez ele venha amanhã.

Maybe he'll come tomorrow.

❌ Quando chegues, avisa-me.

Incorrect — a future temporal clause requires the future subjunctive, not the present.

✅ Quando chegares, avisa-me.

When you arrive, let me know.

❌ Se tenhas tempo, vem.

Incorrect — an open conditional 'se' takes the future subjunctive.

✅ Se tiveres tempo, vem.

If you have time, come.

❌ Faz como queiras.

Incorrect — 'como' as a free relative takes the future subjunctive.

✅ Faz como quiseres.

Do as you wish.

❌ Espera até que eu chegar.

Incorrect — 'até que' takes the present subjunctive, even though it's future-referring.

✅ Espera até que eu chegue.

Wait until I arrive.

❌ Disse que ligava quando chegar.

Incorrect — a past main clause requires the imperfect subjunctive in the subordinate.

✅ Disse que ligava quando chegasse.

He said he'd call when he arrived.

The last example (chegar vs. chegasse) catches out many intermediate learners: once the frame is past, the future subjunctive disappears and the imperfect subjunctive takes over.

The uniquely Portuguese payoff

This two-tense subjunctive system is what makes EP so expressive — and so distinctive compared to Spanish, French, and Italian, all of which have lost the future subjunctive as a living category. Spanish says cuando llegues (present subjunctive); French says quand tu arriveras (future indicative); Italian says quando arriverai (future indicative). Only Portuguese has kept a dedicated, living future subjunctive for exactly the contexts it grammatically marks. Once you hear the difference, you stop hearing Portuguese as "a Spanish dialect" and start hearing it as its own system.

A learner who produces quando chegares and se puderes and faz como quiseres without hesitation has made the single most important grammatical leap available in European Portuguese. This page is the map of the terrain.

Key takeaways

The choice between present subjunctive and future subjunctive is syntactic: it depends on the trigger, not on the time of the event.
Present subjunctive is the default — used after volition, emotion, doubt, impersonal judgment, concession, exceptional conjunctions, talvez, até que, and indefinite noun antecedents.
Future subjunctive is reserved for just three contexts: future temporal conjunctions (quando, assim que, logo que, enquanto, sempre que, mal, conforme), the open conditional se, and indefinite free relatives (quem, o que, onde, como, conforme, quanto).
A past main clause triggers sequence of tenses and shifts the subordinate subjunctive to the imperfect subjunctive, regardless of trigger type.
Até que is the odd one out in the time-conjunction family: it takes the present subjunctive, not the future subjunctive.

Cross-references

Future Subjunctive with Quando — the temporal-conjunction trigger.
Future Subjunctive with Se — the open-conditional trigger.
Future Subjunctive: Relative Clauses — the free-relative trigger.
Future Subjunctive: Common Expressions — the frozen idioms that lock the future subjunctive in place.
Subjunctive vs Indicative: Key Contrasts — the deeper synthesis covering mood choice across all tenses.