In linguistics, a yes–no question, also known as a binary question, a polar question, or a general question,[1] is a closed-ended question whose expected answer is one of two choices, one that provides either an affirmative or negative answer to the question. Typically, the choices are either "yes" or "no" in English. Yes–no questions present an exclusive disjunction, namely a pair of alternatives of which only one is a felicitous answer. In English, such questions can be formed in both positive and negative forms:

  • positive yes/no question: "Will you be here tomorrow?"
  • negative yes/no question: "Won't you be here tomorrow?"[2]

Yes–no questions are in contrast with non-polar wh-questions. The latter are also called content questions, and are formed with the five Ws plus an H ("who", "what", "where", "when", "why", "how"). Rather than restricting the range of possible answers to two alternatives, content questions are compatible with a broad range of alternative answers. For example, questions beginning with "who", involve a set of several alternatives, from which one is to be drawn; in this respect, they are open-ended questions.[2] In contrast, yes–no questions are closed-ended questions, as they only permit one of two answers, namely "yes" or "no".

Grammatical form

Yes–no questions take many forms cross-linguistically. Many languages mark them with word order or verb morphology. Others use question particles or question intonation. These strategies are often mixed and matched from language to language.[3]

Esperanto

In Esperanto, the word "ĉu" added to the beginning of a statement makes it a polar question.

Esperanto Translation
Vi estas blua. You are blue.
Ĉu vi estas blua? Are you blue?

Germanic languages

In Germanic languages, yes–no questions are marked by word order. The following Dutch example shows how questions can be formed using subject inversion.

Example in Dutch of subject verb inversion from a statement to a yes–no question
Dutch Translation
Ik ben een jongen I am a boy.
Ben ik een jongen? Am I a boy?

Hindi-Urdu

In Hindi-Urdu (Hindustani), yes–no questions have rising intonation on the verbal complex, whereas declaratives generally have falling intonation. Unlike English, they do not involve inversion of the finite verb. Yes–no questions optionally co-occur with the wh-word क्या (kyā) [PQP – polar question particle]. The presence of the polar particle क्या (kyā) does not make the characteristic prosody optional.[4]

(A)

क्या

kyā

what.PQP

राज-ने

rāj-ne

raj:MASC.SG.ERG

उमा-को

umā-ko

uma:FEM.SG.DAT

किताब

kitāb

book.FEM.SG.NOM

दी↑

dī↑

give:PRF.3SG.FEM

क्या राज-ने उमा-को किताब दी↑

kyā rāj-ne umā-ko kitāb dī↑

what.PQP raj:MASC.SG.ERG uma:FEM.SG.DAT book.FEM.SG.NOM give:PRF.3SG.FEM

'Did Raj give a/the book to Uma?'

(B)

*क्या

*kyā

what.PQP

राज-ने

rāj-ne

raj:MASC.SG.ERG

उमा-को

umā-ko

uma:FEM.SG.DAT

किताब

kitāb

book.FEM.SG.NOM

दी↓

dī↓

give:PRF.3SG.FEM

*क्या राज-ने उमा-को किताब दी↓

*kyā rāj-ne umā-ko kitāb dī↓

what.PQP raj:MASC.SG.ERG uma:FEM.SG.DAT book.FEM.SG.NOM give:PRF.3SG.FEM

intendedː 'Did Raj give a/the book to Uma?'

(C)

राज-ने

rāj-ne

raj:MASC.SG.ERG

उमा-को

umā-ko

uma:FEM.SG.DAT

क्या

kyā

what

दिया↓?

diyā↓?

give:PRF.3SG.MASC

राज-ने उमा-को क्या दिया↓?

rāj-ne umā-ko kyā diyā↓?

raj:MASC.SG.ERG uma:FEM.SG.DAT what give:PRF.3SG.MASC

'What did Raj give to Uma?'

In the sentences (A) and (B) above, क्या (kyā) is not the argument of any predicate and hence acts as a yes–no question particle. But क्या (kyā) can also function as an argument of a predicate with the meaning ‘what’ as shown in (C)[4]

The question particle क्या (kyā) has a flat intonation while the thematic क्या (kyā) has a pitch accent, which also appears more generally on wh-phrases in Hindi.[4] The most unmarked location for polar-question particle क्या (kyā) is the clause-initial position. But it can appear in almost any other position. It can be clause-medial or clause-final. In an almost mirror image pattern, thematic क्या (kyā) "what", is natural in the immediately preverbal position but odd/marked elsewhere. In casual use, the "yes or no" question marker (in the sense of "is it that") is usually dropped as intonation is usually sufficient.

(D)

(क्या)

(kyā)

what.PQP

राज-ने

rāj-ne

raj:MASC.SG.ERG

(क्या)

(kyā)

what.PQP

उमा-को

umā-ko

uma:FEM.SG.DAT

(क्या)

(kyā)

what.PQP

किताब

kitāb

book.FEM.SG.NOM

(*क्या)

(*kyā)

what

दी

give:PRF.3SG.FEM

(क्या)?

(kyā)?

what.PQP

(क्या) राज-ने (क्या) उमा-को (क्या) किताब (*क्या) दी (क्या)?

(kyā) rāj-ne (kyā) umā-ko (kyā) kitāb (*kyā) dī (kyā)?

what.PQP raj:MASC.SG.ERG what.PQP uma:FEM.SG.DAT what.PQP book.FEM.SG.NOM what give:PRF.3SG.FEM what.PQP

'Did Raj give a/the book to Uma?'

(E)

(*क्या)

(*kyā)

what.PQP

राज-ने

rāj-ne

raj:MASC.SG.ERG

(*क्या)

(*kyā)

what.PQP

उमा-को

umā-ko

uma:FEM.SG.DAT

क्या

kyā

what

दिया

diyā

give:PRF.3SG.MASC

(*क्या)?

(*kyā)?

what.PQP

(*क्या) राज-ने (*क्या) उमा-को क्या दिया (*क्या)?

(*kyā) rāj-ne (*kyā) umā-ko kyā diyā (*kyā)?

what.PQP raj:MASC.SG.ERG what.PQP uma:FEM.SG.DAT what give:PRF.3SG.MASC what.PQP

'What did Raj give Uma?'

Some example sentences with varied positions of the yes–no particle are shown in the table below:

Questions Transliteration Literal Translation
तेरा नाम राज है ? terā nām rāj hai? your name Raj is? "Is your name Raj?"
क्या तेरा नाम राज है ? kyā terā nām rāj hai? what your name Raj is? "Is your name Raj?"
तेरा क्या नाम राज है ? terā kyā nām rāj hai? your what name Raj is? "Is your name Raj?"
तेरा नाम क्या राज है ? terā nām kyā rāj hai? your name what Raj is? "Is your name Raj?"
तेरा नाम राज क्या है ? terā nām rāj kyā hai? your name Raj what is? "What is your name 'Raj'?"
तेरा नाम राज है क्या ? terā nām rāj hai kyā? your name Raj is what? "Is your name Raj?"

Note: क्या (kyā) can only be interpreted as "what" in the second last sentence in the table above.

Japanese

In Japanese, the response to a negative yes/not question is opposite to that of English. For example, asking "Won't you be here tomorrow?" (明日ここにいないですか?) the response would be “Yes” (はい) if the respondent wished to agree that they will not be there tomorrow, and “No” (いいえ) if the respondent wished to disagree and say that they will be there tomorrow.

A question is formed by appending the particle か to a statement, as shown in the table below.

Japanese Translation
(私は) 男です。 I am a man.
(私は) 男ですか? Am I a man?

Latin

In Latin, the enclitic particle -ne (sometimes just "-n" in Old Latin) can be added to the emphatic word to turn a declarative statement into a yes–no question. It usually forms a neutral yes–no question, implying neither answer (except where the context makes it clear what the answer must be).[5] For example:[6]

Latin Translation
Tu id veritus es. "You feared that."
Tu-nē id veritus es? "Did you fear that?"

Yes–no questions are also formed in Latin using the word "nonne" to imply that the interrogator thinks the answer to be the affirmative and with "num" to imply that the interrogator thinks the answer to be the negative.[5] For example:

("You dare not deny, do you?")

Catullus, 1,4,8[5]

Mithridātēs nōnne ad Cn. Pompeium lēgātum mīsit?

("Didn't Mithridates send an ambassador to Gnaeus Pompey?")

Pompey, 16,46[5]