To quantify a set, Esperanto distinguishes its complete membership, an indefinite subset, and an empty selection. Ĉiuj means all members of a group; kelkaj means a small unspecified number; iuj selects some unspecified individuals; and neniu excludes every individual. For amounts rather than individuals, Esperanto uses forms such as iom da, multe da, and neniom da.
These words are not merely translations of English all, some, and no. Their grammar shows whether speakers are counting individuals, measuring an amount, or talking about kinds. Article choice follows the same logic: ĉiuj and neniu determine their phrases and exclude la, while ordinary quantity adjectives can occur in definite or indefinite phrases. Kelkaj kolegoj, for example, remains indefinite even if the speaker has particular colleagues in mind but the listener cannot identify them; specificity alone does not require la.
Ĉiuj: every member of the group
Plural ĉiuj presents the complete set. It takes -j because the set has multiple members and -n when it is a direct object. The following count noun and any ordinary adjective agree.
Ĉiuj novaj dungitoj partoprenos la trejnadon.
All the new employees will take part in the training.
Mi sendis la ĝisdatigon al ĉiuj registritaj uzantoj.
I sent the update to all registered users.
After al, the phrase does not take accusative -n. By contrast:
Ni informis ĉiujn registritajn uzantojn pri la ŝanĝo.
We informed all registered users about the change.
Here ĉiuj-n registrita-j-n uzanto-j-n is the direct object. The article la is absent because ĉiuj itself determines the complete group.
Use ĉio for “everything” without an expressed noun. Use ĉiu for “each/every” when members are considered one by one. Thus ĉiuj studentoj respondis reports about the group, while ĉiu studento respondis distributes the statement across individuals.
Some individuals: kelkaj and iuj
Kelkaj is a quantity A-word: it means a small, unspecified number, “some/a few.” It normally accompanies a plural count noun and agrees in accusative case. Iuj, a U-correlative, highlights unspecified individual identity: “some ones/some people.” The two meanings overlap, but their focus differs.
Kelkaj najbaroj helpis nin porti la meblojn.
A few neighbors helped us carry the furniture.
Iuj najbaroj preferis ne partopreni la kunvenon.
Some neighbors preferred not to take part in the meeting.
The first sentence foregrounds a small number. The second contrasts an unspecified subset of individuals with other neighbors. In many ordinary situations either form is possible, but kelkaj answers “how many, approximately?” more directly, while iuj answers “which members?—some unspecified ones.”
Both can stand in partitive constructions:
Kelkaj el la fotoj estas malklaraj, sed iuj el ili estas vere belaj.
A few of the photos are blurry, but some of them are truly beautiful.
The phrase after el identifies the larger set. Compare bare kelkaj fotoj, which introduces an indefinite group, with kelkaj el la fotoj, which selects a subset of already identified photos.
English some can also mean an unspecified amount. Use iom da rather than plural kelkaj with a mass meaning.
Ĉu vi volas iom da teo?
Would you like some tea?
Iom is an invariable quantity word; teo follows da without accusative. Kelkaj teoj would mean several kinds or servings of tea, a count interpretation.
No individuals: neniu and neniuj
Singular neniu normally means “no one, nobody, not any one” or determines a singular noun: neniu gasto, neniun eraron. Although it excludes every possible member of a set, its grammatical perspective is singular: not one member.
Neniu gasto plendis pri la manĝaĵo.
No guest complained about the food.
Mi trovis neniun eraron en la fina raporto.
I found no error in the final report.
In the object phrase, both neniu-n and erar-o-n take accusative -n. Do not add la: la neniu eraro is not the neutral construction.
Plural neniuj is accepted when an explicitly plural contrast matters, especially with an expressed plural noun. It can mean that none remain where several were expected.
Post la purigado restis neniuj tasoj sur la tablo.
After the cleanup, no cups remained on the table.
The plural draws attention to the expected group of cups. Singular neniu taso restis is also normal and views the result as “not one cup.” This is genuine accepted variation with a difference in viewpoint, not a rigid right-versus-wrong pair.
For no amount, use neniom da:
Restas neniom da lakto, do mi iros al la vendejo.
There is no milk left, so I will go to the store.
In everyday speech, ne restas lakto is often simpler. Neniom da explicitly focuses on zero quantity.
One negative is enough
Esperanto negative correlatives already contain negation. When neniu, nenio, neniam, or another neni- word supplies the negative meaning, the clause normally does not also use ne.
Neniu respondis al mia mesaĝo.
Nobody answered my message.
Mi vidis neniun ĉe la haltejo.
I saw nobody at the bus stop.
Adding ne would produce two negative elements and can reverse or confuse the intended logic. English dialects differ in whether negative concord is possible; standard Esperanto instead places the single negative meaning in the neni- word.
— Ĉu iu jam alvenis? — Ne, neniu ankoraŭ alvenis.
— Has anyone arrived yet? — No, nobody has arrived yet.
The answer begins with independent Ne “No,” then the clause neniu ankoraŭ alvenis contains its own negative subject. There is no clause-level ne alvenis.
Completeness, subset, and definiteness
Compare one identifiable group from three perspectives:
Ĉiuj volontuloj venis; kelkaj el la volontuloj alvenis frue, kaj neniu foriris antaŭ la fino.
All the volunteers came; some of the volunteers arrived early, and nobody left before the end.
Ĉiuj volontuloj treats the relevant volunteer group as complete. Kelkaj el la volontuloj selects a subset from that definite group. Neniu independently excludes every possible person as the subject of foriris.
When a possessive or demonstrative identifies the larger set, ĉiuj normally comes first: ĉiuj miaj dosieroj, ĉiuj tiuj mesaĝoj. A partitive with el is often clearer when only a subset is selected: kelkaj el miaj dosieroj, iuj el tiuj mesaĝoj. See Determiner Order and Compatibility.
Common Mistakes
1. Adding la after ĉiuj
❌ La ĉiuj gastoj jam alvenis.
Incorrect: ĉiuj itself determines the complete group.
✅ Ĉiuj gastoj jam alvenis.
All the guests have already arrived.
2. Leaving a plural object uninflected
❌ Mi legis ĉiuj gravaj mesaĝoj.
Incorrect: ĉiuj, the adjective, and the noun need plural accusative marking.
✅ Mi legis ĉiujn gravajn mesaĝojn.
I read all the important messages.
3. Using kelkaj for an undivided amount
❌ Bonvolu aldoni kelkajn sukeron.
Incorrect for an amount of sugar: kelkaj selects countable items.
✅ Bonvolu aldoni iom da sukero.
Please add some sugar.
4. Adding ne to a negative-correlative clause
❌ Neniu ne komprenis la demandon.
Incorrect for ‘Nobody understood’: the extra ne creates a second negation.
✅ Neniu komprenis la demandon.
Nobody understood the question.
5. Putting accusative after da
❌ Mi havas neniom da tempon hodiaŭ.
Incorrect: the noun after da does not take object -n.
✅ Mi havas neniom da tempo hodiaŭ.
I have no time today.
Key Takeaways
Use ĉiuj for the complete plural set, kelkaj for a small unspecified number, iuj for unspecified individual members, and neniu for not one member. Use iom da and neniom da for amounts. These choices control number and case: ĉiujn librojn, kelkajn librojn, neniun libron, but iom da akvo. A neni- word normally supplies the clause's only negation.
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Start learning Esperanto →Related Topics
- Both, Each, and EveryB1 — How ambaŭ, ĉiu, ĉiuj, and tuta distinguish a pair, separate members, a complete group, and a whole entity.
- Quantifiers in the Noun PhraseA2 — How numbers, quantity adjectives, and da-expressions combine with nouns, determiners, plural marking, and accusative case.
- Determiner Order and CompatibilityB2 — Which Esperanto determiners replace la, which combinations are possible, and how to order determination, quantity, and description.
- Correlative DeterminersA2 — How the -u, -a, and -es correlatives determine identity, type, or possession before a noun.
- Ĉiu: The Universal Individual CorrelativeB2 — Use ĉiu for every individual separately and ĉiuj for all members viewed together, with full case and number marking.
- Neniu: The Negative Individual CorrelativeC1 — Use neniu to exclude every individual in a relevant set, with correct case, number, determiner behavior, and negation scope.