zda / jestli
Indirect Question with Zda or Jestli
In Czech, indirect yes-no questions are introduced by jestli (neutral/spoken) or zda (formal/written). They connect a main clause expressing inquiry, doubt, or perception to an embedded question.
How It Works
When embedding a yes-no question into another sentence (e.g., "I don't know whether..."), Czech uses jestli or zda. Note that jestli and zda are 100% interchangeable in meaning for indirect questions, differing only in register.
1. Register and Usage:
- Jestli: Highly frequent and the absolute default in spoken Czech and casual writing. Note that jestli has a dual function and can also mean "if" in real conditional clauses (e.g., Jestli prší... / If it is raining...).
- Zda: Formal and characteristic of written language, official documents, and academic prose. Using it in casual conversation can sound stiff. Unlike jestli, zda is strictly interrogative and cannot introduce conditional clauses.
- Zdali and -li: You may also encounter the highly formal or slightly archaic variant zdali, as well as the enclitic -li (e.g., Nevím, přijde-li.), which attaches with a hyphen to the first stressed word of the embedded clause (which is usually, but not always, the verb).
2. No Tense Backshifting:
English uses a "sequence of tenses" where a past-tense main verb forces the embedded question into the past (e.g., "He asked if I had time"). Czech strictly rejects this. The indirect question must retain the exact tense of the original direct question. If the original question was "Máš čas?" (present), the indirect question is Zeptal se, jestli mám čas (literally: He asked if I have time).
3. Word Order and Punctuation:
The embedded question uses normal declarative word order. A comma is strictly required before jestli or zda to separate the clauses. The sentence ends with a period, not a question mark, unless the main clause itself is a question (e.g., Nevím, jestli přijde. vs. Víš, jestli přijde?).
4. Advanced Constructions:
- Whether or not: To express alternatives, you can add , nebo ne at the end of the clause (e.g., Nevím, jestli přijde, nebo ne.).
- With infinitives: When the subject of the main clause and the embedded question is the same, you can use an infinitive instead of a conjugated verb (e.g., Nevím, zda se smát, nebo brečet.).
5. What to Avoid:
- Confusing with že: Do not confuse this pattern with že (which introduces reported facts/statements, not uncertainty). For example, use ✅ Nevím, jestli přijde, not ❌ Nevím, že přijde (which means "I don't know the fact that he will come").
- Stacking že and jestli: Never combine the two conjunctions. A common mistake is saying ❌ Zeptal se, že jestli mám čas. The correct form is ✅ Zeptal se, jestli mám čas.
- Confusing with kdyby: Do not use kdyby + kondicionál here, as it is strictly for hypothetical, unreal conditions.
- Combining with WH-question words: Because English uses 'if/whether' for yes-no questions, learners sometimes incorrectly combine jestli with question words (kdo, co, kde, atd.). Use jestli/zda only for yes-no questions. For WH-questions, just use the question word (e.g., ✅ Nevím, kde bydlí, not ❌ Nevím, jestli kde bydlí).
Examples (6)
- Nevím, jestli přijde.
I don't know whether he will come.
Word by Word: Not-I-know, if comes.
A standard, neutral indirect question using 'jestli'.
- Zeptal se mě, zda souhlasím s návrhem.
He asked me whether I agreed with the proposal.
Word by Word: Asked self me, whether I-agree with proposal.
Formal register using 'zda'. Notice the lack of tense backshift: 'souhlasím' (I agree) remains in the present tense despite the past tense main verb 'zeptal se'.
- Zajímalo by mě, jestli o tom věděl.
I would be curious whether he knew about it.
Word by Word: Interested would me, if about it knew.
Here, the embedded clause is in the past tense because the original direct question was also in the past tense ("Věděl o tom?").
- Lékař zjišťoval, zda pacient užívá nějaké léky.
The doctor was finding out whether the patient was taking any medication.
Word by Word: Doctor was-finding-out, whether patient takes some medications.
A formal, written context where 'zda' is highly appropriate. The present tense 'užívá' is retained from the original question.
- Nevím, jestli přijde, nebo ne.
I don't know whether he will come or not.
Word by Word: Not-I-know, if comes, or not.
Adding ', nebo ne' expresses the 'whether or not' alternative explicitly.
- Nevím, zda se smát, nebo brečet.
I don't know whether to laugh or cry.
Word by Word: Not-I-know, whether self to-laugh, or to-cry.
When the subject is the same, an infinitive can be used after 'zda' or 'jestli'.
Common Mistakes
Shifting the question into the past when the original question was in the present.
Different MeaningZeptal se mě, jestli jsem měl čas.Zeptal se mě, jestli mám čas.'Zeptal se mě, jestli jsem měl čas' is correct, but it reports a past question ('Did you have time?'). Czech does not shift tenses: if the direct question was 'Máš čas?' (present), the indirect question stays present, 'jestli mám čas', even if 'zeptal se' is past.
Using 'že' where an open question ('whether') is meant.
Different MeaningNejsem si jistý, že to funguje.Nejsem si jistý, jestli to funguje.'Nejsem si jistý, že to funguje' is correct: it says you doubt that a statement is true. To say you do not know whether it works (an open question), use 'jestli' or 'zda': 'Nejsem si jistý, jestli to funguje.'
Combining 'jestli' or 'zda' with WH-question words.
Nevím, jestli kde bydlí.Nevím, kde bydlí.In Czech, 'jestli' and 'zda' are strictly for yes-no questions. When reporting a question that already has a question word (like kdo, co, kde, kdy), simply use that question word to connect the clauses. Do not add 'jestli'.
How It Connects
Learn This First
To learn indirect questions with 'zda' or 'jestli', you first need to know how to form basic yes-no questions. You should also be familiar with how Czech uses subordinate clauses for reported speech (like those starting with 'že') and understand that 'zda' and 'jestli' act as the connectors for these reported questions.
- žeContent Clause with Že
The structure of indirect questions (subordinate content clauses) is syntactically similar to content clauses introduced by 'že', which provides the foundational framework for reported speech.
Level 3 - jestli / zdaIndirect Yes-no Question
This pattern relies on the specific conjunctions 'jestli' and 'zda' to function as markers for the indirect question.
Level 3
Related Patterns
- kdyby + ConditionalHypothetical Kdyby Clause
English uses 'if' for both indirect questions and hypothetical conditions. In Czech, 'kdyby' is strictly for hypothetical conditions, while 'jestli/zda' is used for indirect questions.
Level 3 - Yes-no question
This is the direct form of a yes-no question, which 'zda' and 'jestli' are used to embed into another sentence.
Level 1 - -liEnclitic Conditional -li
The enclitic '-li' is a highly literary, archaic equivalent to 'zda' that attaches directly to the first stressed word of the embedded clause.
Level 6
Words in This Pattern
Practice zda / jestli in Bubblegum
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