Conditional vs Indicative | Czech Grammar

Once you can form the conditional (udělal bych), the real question becomes when to use it instead of a plain indicative tense. English speakers tend to over-trigger on the word "would" — but English "would" is a tangle of meanings, only some of which correspond to the Czech conditional. This page sorts out the boundary: where Czech demands the conditional, where it demands the plain indicative, and the famous trap where English "would" is not conditional at all.

The one-line rule

Use the conditional when the situation is unreal, hypothetical, hedged, or merely wished for. Use the indicative when the situation is real, factual, or a genuine open possibility. The dividing line is reality, not the English word "would."

Real conditions take the indicative

A real condition is one that may genuinely happen — an open if/when about the future or a habitual truth. Czech marks these with když ("when/if") or jestli / pokud ("if") plus the plain indicative (usually the future). No by anywhere.

Když budu mít čas, přijdu.

If/when I have time, I'll come. (a real, open possibility)

Jestli přijdeš, uvidíme se.

If you come, we'll see each other.

Pokud bude pršet, zůstaneme doma.

If it rains, we'll stay home.

The reasoning: these events are still genuinely possible. I might well have time; you might well come. Czech treats them as facts-in-waiting and uses the indicative future. For the tense mechanics of these open conditions, see the future in conditions.

Unreal conditions take the conditional

An unreal (counterfactual or remote) condition imagines something that is not the case, or that is unlikely. Here the if-clause uses kdyby (which already contains the auxiliary by) and the main clause uses the conditional.

Kdybych měl čas, přišel bych.

If I had time, I'd come. (but I don't have time — unreal)

Co bys dělal, kdybys vyhrál milion?

What would you do if you won a million? (remote, imagined)

Bez tebe bych to nezvládl.

Without you I wouldn't manage it. (counterfactual)

The minimal pair below is the whole lesson in two sentences. Same English "if," radically different Czech depending on whether the condition is real or unreal:

Když budu mít čas, přijdu.

If I have time, I'll come. (real — I expect I might)

Kdybych měl čas, přišel bych.

If I had time, I'd come. (unreal — I don't have time)

	Real condition	Unreal condition
if-clause	když / jestli / pokud + indicative	kdyby + l-participle
main clause	indicative (future)	conditional (auxiliary + l-participle)
example	Když budeš chtít, zavolej.	Kdybys chtěl, zavolal bys.
feel	"this may happen"	"this isn't the case"

Politeness and hedging take the conditional

Beyond conditions, the conditional is Czech's main tool for softening. Three everyday uses:

Polite requests. A bare present tense sounds blunt; the conditional makes it courteous.

Mohl bys mi podat sůl?

Could you pass me the salt? (vs the blunt 'Podej mi sůl')

Chtěla bych zaplatit, prosím.

I'd like to pay, please. (female speaker)

Softened opinions. Czech hedges assertions with Řekl bych, že… ("I'd say that…"), exactly mirroring the English softener.

Řekl bych, že má pravdu.

I'd say he's right. (male speaker, hedged opinion)

To by mohlo fungovat.

That could work. (tentative)

Tentative suggestions.

Neměli bychom už jít?

Shouldn't we get going? (gentle nudge)

For more on the courtesy uses, see the conditional for polite requests.

The big trap: English "would" that is NOT conditional

This is the error that separates intermediate from advanced. English uses would for habitual past actions — "When I was a child, I would walk to school every day." That would means "used to," a repeated past habit. It has nothing to do with hypotheticals, and Czech does not use the conditional for it.

Instead, Czech uses an imperfective past — very often a special frequentative (iterative) verb formed for exactly this "used to / repeatedly" meaning. The frequentative of chodit ("to go regularly") is chodívat; its past is chodíval.

Jako dítě jsem tam chodíval každý den.

As a child I would go there every day. (= used to go — habitual past)

V létě jsme jezdívali k babičce.

In summer we would (used to) go to grandma's.

Vždycky si dával kávu po obědě.

He would always have a coffee after lunch. (habitual)

None of these contains by. If you tried ❌ chodil bych tam každý den you would say "I would go there every day (if some condition held)" — a hypothetical, not a memory. The frequentative formation is covered in detail on iterative and frequentative verbs.

💡

Before translating "would," ask: can I replace it with "used to"? If yes, it is a habitual past → imperfective/frequentative past, no conditional. If "used to" makes no sense and "if such-and-such were true" fits → it is a real hypothetical → conditional with by.

After aby and kdyby, the conditional is automatic

You do not "choose" the conditional after aby and kdyby — these conjunctions are conditional auxiliaries fused into a word, so the conditional is structurally built in. Kdybych věděl ("if I knew") and abych věděl ("so that I'd know") both carry the by inside the conjunction; the verb appears as a bare l-participle. There is no separate decision to make.

Přišel jsem dřív, abych ti pomohl.

I came early so that I could help you. (male speaker)

Kdyby ses zeptal, řekl bych ti to.

If you'd asked, I'd have told you. (to a man)

The full treatment of these subordinators is on aby and kdyby conditional clauses.

Common mistakes

❌ Kdybych budu mít čas, přijdu.

Incorrect — kdyby cannot combine with a future/indicative; it takes the bare l-participle.

✅ Kdybych měl čas, přišel bych.

If I had time, I'd come. (male speaker)

❌ Když bych měl čas, přišel bych.

Incorrect — for an unreal condition use kdyby, not 'když + bych'.

✅ Kdybych měl čas, přišel bych.

If I had time, I'd come. (male speaker)

❌ Jako dítě bych tam chodil každý den.

Incorrect for habitual past 'used to' — this reads as a hypothetical, not a memory.

✅ Jako dítě jsem tam chodíval každý den.

As a child I would (used to) go there every day. (male speaker)

❌ Chci přijít? Ne — Chtěl bych přijít.

Incorrect register — the bare present 'Chci' is blunt; the conditional 'Chtěl bych' is the polite request.

✅ Chtěl bych přijít.

I'd like to come. (male speaker, polite)

❌ Když přijdeš zítra, byl bych rád.

Incorrect mix — a real future condition with a hypothetical main clause; keep them consistent.

✅ Když přijdeš zítra, budu rád.

If you come tomorrow, I'll be glad. (real, both indicative)

Key takeaways

Reality is the test. Real/open conditions → indicative (Když budu mít čas, přijdu). Unreal/remote conditions → conditional with kdyby (Kdybych měl čas, přišel bych).
The conditional also handles politeness, hedged opinions, and tentative suggestions (Mohl bys…?, Řekl bych, že…).
Habitual past "would" (= "used to") is NOT conditional — it is an imperfective/frequentative past (chodíval jsem). This is the single biggest English-transfer error.
After aby and kdyby the conditional is automatic, baked into the conjunction.

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