Most Italian congiuntivo forms are productive — you build them on the fly because some trigger (a che, a verb of opinion, a concessive operator) calls for them. But a small, important class of expressions carry the congiuntivo as a fossil: the form is frozen, the trigger is invisible or has eroded, and you cannot reverse-engineer the mood from current grammar. You learn them as units and reach for them as units.
This page collects the most useful frozen subjunctives in modern Italian — vada come vada, costi quel che costi, che io sappia, Dio ce ne scampi, non sia mai detto, piaccia o non piaccia, si dica quel che si vuole, sia lodato — and explains the historical mechanism that produced them, how they fit register-wise, and why they resist productive analysis.
What "frozen" means
A productive congiuntivo lets you swap the verb freely (voglio che tu venga / scriva / mi creda). A frozen expression locks the verb in place: vada come vada never becomes venga come venga without changing the meaning. Substitution outside the frozen slots produces nonsense or a wholly different idiom.
Costi quel che costi, lo finiremo entro venerdì.
Whatever it costs, we'll finish it by Friday.
Che io sappia, non hanno ancora deciso.
As far as I know, they haven't decided yet.
Vada come vada — "come what may"
Vada come vada — literally "let it go as it goes" — means come what may, whatever happens. The structure: vada (subjunctive of andare) + come + vada, the verb framing the indefinite come.
Vada come vada, io ho fatto del mio meglio.
Come what may, I've done my best.
Domani c'è il colloquio. Vada come vada, sono fiero di me stesso.
Tomorrow's the interview. Whatever happens, I'm proud of myself.
The historical logic: a hortatory subjunctive ("let it go") plus the indefinite come. The structure is the same as sia come sia ("be that as it may"). You will also hear succeda quel che succeda ("whatever happens"), built on the same template.
Sia come sia, dobbiamo trovare una soluzione.
Be that as it may, we have to find a solution.
Costi quel che costi — "whatever it costs"
Costi quel che costi is the canonical "whatever the cost" idiom: costi (subjunctive of costare) + quel che + costi. It conveys absolute determination — the action will happen regardless of the price.
Devo finire questo progetto, costi quel che costi.
I have to finish this project, whatever it costs.
Lo Stato proteggerà i suoi cittadini, costi quel che costi.
The state will protect its citizens, whatever the cost. (formal/political)
The phrase is slightly dramatic and elevated. In casual speech, Italians often substitute a tutti i costi ("at all costs"), which has no verb. The same template produces succeda quel che succeda and facciano quel che facciano.
Lo voglio a tutti i costi.
I want it at all costs. (more conversational)
Che io sappia — "as far as I know"
Che io sappia — literally "that I might know" — is a hedging idiom meaning as far as I know, to my knowledge. It marks the speaker's epistemic limit.
Che io sappia, Marco è in vacanza fino a lunedì.
As far as I know, Marco is on vacation until Monday.
Non ci sono problemi, che io sappia.
There are no problems, as far as I know.
Che io sappia, il museo è chiuso il martedì.
To my knowledge, the museum is closed on Tuesdays.
This is high-frequency in spoken Italian — far more colloquial than the bookier per quanto ne sappia or the formal a quanto mi consta. The first-person form is the default; the third-person che lui sappia is rare because the construction fundamentally hedges the speaker's own claim.
Dio ce ne scampi / Dio ci scampi — "God forbid"
Dio ce ne scampi ("may God spare us from it") and the shorter Dio ci scampi are exclamations of horrified rejection. Scampi is a hortatory present subjunctive of scampare ("to spare, to save from danger").
Dio ce ne scampi, non voglio nemmeno pensarci.
God forbid, I don't even want to think about it.
Se dovesse vincere lui le elezioni — Dio ce ne scampi — saremmo rovinati.
If he were to win the election — God forbid — we'd be ruined.
These are emphatic, slightly old-fashioned, and entirely conversational despite their religious origin — used by religious and secular speakers alike. Related fossils: Dio voglia che... ("God grant that..."), Dio non voglia ("God forbid"), Dio mi perdoni ("God forgive me").
Dio voglia che non piova durante il matrimonio.
God grant it doesn't rain during the wedding.
Non sia mai (detto) — "perish the thought"
Non sia mai (sometimes non sia mai detto — "let it never be said") is a hortatory fossil meaning never let it happen, perish the thought. The sia is the present subjunctive of essere.
Non sia mai che ti dimentichi del mio compleanno!
God forbid you forget my birthday!
Non sia mai detto che gli italiani non sappiano fare la pizza.
Let it never be said that Italians don't know how to make pizza.
In modern use the expression is often ironic — non sia mai che lui faccia la spesa ("God forbid he should do the grocery shopping") drips sarcasm. The elevated, dramatic subjunctive is precisely what makes the irony land in everyday contexts.
Piaccia o non piaccia — "like it or not"
Piaccia o non piaccia ("may it please or not please") means like it or not. Structure: piaccia (subjunctive of piacere) + o non + piaccia.
Piaccia o non piaccia, dobbiamo accettare la decisione.
Like it or not, we have to accept the decision.
Piaccia o non piaccia, l'inglese è la lingua del commercio internazionale.
Like it or not, English is the language of international commerce.
The template — verb-subjunctive + o non + verb-subjunctive — also generates voglia o non voglia ("willing or not") and creda o non creda ("whether one believes or not"). The verb slot is semi-productive, but the template itself is fossilized.
Voglia o non voglia, finirà per cedere.
Willing or not, he'll end up giving in.
Si dica quel che si vuole — "say what one will"
Si dica quel che si vuole ("let one say what one wants") means say what you will, regardless of what people say. The speaker's claim stands against the chorus of contrary voices.
Si dica quel che si vuole, ma quel film è un capolavoro.
Say what you will, but that film is a masterpiece.
Si dica quel che si vuole della politica, ma le strade adesso sono pulite.
Whatever people say about politics, the streets are clean now.
A close cousin in higher register: checché se ne dica ("whatever one may say about it"), with the literary indefinite checché — bookish, journalistic, common in op-eds.
Checché se ne dica, l'economia sta migliorando.
Whatever people say, the economy is improving. (literary/journalistic)
Sia lodato / sia ringraziato — "praised be / be thanked"
Sia lodato (praised be) and sia ringraziato (be thanked) are exclamatory hortatory passives — religious in origin, but they survive in secular hyperbole.
Sia lodato Iddio, ce l'abbiamo fatta!
Praise God, we made it!
Sia benedetta la persona che ha inventato il caffè.
Blessed be the person who invented coffee. (secular hyperbole)
A religious speaker uses these earnestly; a secular speaker reaches for them as comic exaggeration when something unexpectedly works out.
Volesse il cielo / magari fosse — "would to heaven / if only it were"
Volesse il cielo che... and magari + congiuntivo imperfetto are frozen optatives expressing wishful longing. The magari construction is alive and productive (modern Italians use it constantly); volesse il cielo is bookish and theatrical.
Magari fosse così facile!
If only it were that easy!
Magari avessi più tempo libero.
If only I had more free time.
Volesse il cielo che fosse vero.
Would to heaven it were true. (literary/old-fashioned)
A summary table
| Expression | Meaning | Register | Subjunctive form |
|---|---|---|---|
| vada come vada | come what may | colloquial-emphatic | presente |
| sia come sia | be that as it may | colloquial-emphatic | presente |
| costi quel che costi | whatever it costs | elevated colloquial | presente |
| che io sappia | as far as I know | conversational | presente |
| Dio ce ne scampi | God forbid | conversational, slightly old-fashioned | presente |
| non sia mai (detto) | perish the thought | conversational, often ironic | presente |
| piaccia o non piaccia | like it or not | conversational | presente |
| si dica quel che si vuole | say what one will | elevated colloquial / journalistic | presente |
| sia lodato / sia ringraziato | praised be / be thanked | religious or comic | presente |
| volesse il cielo | would to heaven | literary/old-fashioned | imperfetto |
| magari fosse | if only it were | conversational | imperfetto |
| checché se ne dica | whatever one may say | literary/journalistic | presente |
Why these forms resist productive analysis
In productive subjunctive constructions, the trigger is right there: a che, a benché, a voglio. In the frozen expressions, the trigger is invisible or eroded. Che io sappia descends from a longer construction like (per quanto) che io sappia in which the che belonged to a relative or concessive clause now elided. Vada come vada was probably (la cosa) vada come vada, with la cosa deleted over centuries. Costi quel che costi preserves the relative quel che but no longer feels like a relative clause to modern speakers.
English has an analogous but much smaller stock — come what may, be that as it may, God forbid, long live the king, suffice it to say, far be it from me. The pattern is identical (hortatory subjunctive locked into a fixed phrase), but Italian has many more and they remain in active everyday use. Suffice it to say sounds bookish; che io sappia is something every Italian uses daily.
Common mistakes
❌ Costa quel che costa, lo finiremo.
Wrong — the frozen expression requires the subjunctive (costi), not the indicative (costa). The indicative version exists but means something different (asserting the actual cost).
✅ Costi quel che costi, lo finiremo.
Whatever it costs, we'll finish it.
❌ Che io so, non hanno ancora deciso.
Wrong — the fossil is che io sappia (subjunctive). Che io so is ungrammatical here, even though sapere normally takes the indicative in main clauses.
✅ Che io sappia, non hanno ancora deciso.
As far as I know, they haven't decided yet.
❌ Vada dove vada, sarò sempre con te.
Wrong — the fossil is vada come vada (manner), not vada dove vada (place). The place equivalent is dovunque vada or ovunque vada.
✅ Vada come vada, sarò sempre con te.
Come what may, I'll always be with you.
✅ Dovunque vada, sarò sempre con te.
Wherever I go, I'll always be with you. (different construction — concessive-relative)
❌ Piaccia o piaccia non, dobbiamo farlo.
Wrong — the fixed order is piaccia o non piaccia (verb + o non + verb), not piaccia o piaccia non.
✅ Piaccia o non piaccia, dobbiamo farlo.
Like it or not, we have to do it.
❌ Magari era così facile!
Wrong — magari + indicative imperfetto (era) doesn't form the optative wish. Use the imperfect subjunctive (fosse).
✅ Magari fosse così facile!
If only it were that easy!
Why this is hard for English speakers
Three frictions:
No productive trigger to look for. Most Italian subjunctive instruction tells you to spot a trigger and respond with the subjunctive. These frozen expressions have no trigger — you must memorize them as units. Learners trained to find triggers tend to miss the fossils entirely.
The literal translation is misleading. Che io sappia literally means "that I might know" — a relative clause fragment that English speakers do not parse as a hedging idiom.
The register is unusual. Frozen subjunctives sit between casual and literary. English speakers often produce them in formal writing (where they belong) but skip them in chat (where Italians use them constantly), missing expressive coloring fluent Italians take for granted.
Key takeaways
Frozen subjunctive expressions are lexical items, not productive constructions. Memorize and deploy them whole.
The most useful set for everyday speech: che io sappia, costi quel che costi, vada come vada, piaccia o non piaccia, Dio ce ne scampi, non sia mai, magari fosse.
The historical mechanism is a hortatory subjunctive combined with an indefinite element (come, quel che, o non).
Register matters. Sia lodato and volesse il cielo are bookish; che io sappia and piaccia o non piaccia are everyday.
Do not invent new fossils by analogy. Vada come vada works; vada dove vada does not.
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Open the Italian course →Related Topics
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- Coordinated Subjunctive ClausesC1 — When a single congiuntivo trigger governs two or more coordinated clauses — Voglio che tu venga e che mi aiuti / e mi aiuti — including the optional che-deletion variant, tense alignment across the chain, and what happens when ma or o intervenes.
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- Il Congiuntivo: OverviewB1 — The Italian subjunctive is a living mood, not a textbook curiosity — it expresses doubt, opinion, emotion, and desire, and you cannot sound educated in Italian without it. Here's the full landscape: tenses, triggers, and where to start.