Qualche, Alcuni/e: Two Ways to Say 'Some'

English uses one word — some — to express vague plural quantity: some books, some friends, some ideas. Italian, characteristically, gives you a choice of three. Qualche is the most distinctively Italian of the three: it is invariable, it always combines with a singular noun, but its meaning is plural. Alcuni and alcune are the more transparent option: regular plural agreement, with the form changing for masculine and feminine. And the partitive article — dei, degli, delle — offers a third route, treating the indefinite plural as if it were quantity drawn from a mass.

The three are very close in meaning, and a competent speaker can swap them in many sentences without raising eyebrows. But they are not interchangeable in every register, and the grammatical mismatch behind qualche libro (singular form, plural meaning) is one of the early-stage Italian quirks that English speakers stumble over most often. This page lays out the three options, shows where each is natural, and explains the logic behind the surface oddity of qualche.

1. Qualche — invariable, singular form, plural meaning

Qualche is the determiner that breaks the agreement system that runs through the rest of Italian grammar. It is invariable: one form for both genders, never marked for number. And the noun that follows is always singular — even though the meaning is plural.

The grammatical agreement follows the singular form: a verb whose subject is qualche libro takes a singular verb. Qualche libro è interessante — never qualche libri sono interessanti. The meaning may be plural, but the syntax treats libro as the singular noun it is on the surface.

The fixed phrase qualche volta — "sometimes" — illustrates the same logic: volta is singular, the meaning is iterative, and the verb that follows is singular. Qualche volta is one of the most common adverbial uses of the determiner in everyday speech.

Why singular?

The singular form is not a quirk for its own sake — it carries a faint meaning. Qualche is etymologically qual che ("of whatever sort"), and its core sense is "some unspecified instance" — one or more, but considered as a representative case rather than a counted plurality. When you say qualche libro, you are not so much enumerating books as gesturing at "some-book-or-other," with the singular form keeping the focus on the type rather than on a definite plural quantity. Alcuni libri, by contrast, treats the books as a small but real plural set.

This semantic shading is subtle and most speakers do not consciously feel it. But the grammar reflects the older logic: qualche keeps the noun singular because it points to kind rather than to count.

2. Alcuni / alcune — regular plural agreement

Alcuni (masculine plural) and alcune (feminine plural) are the well-behaved alternative. They inflect normally for gender, they take a plural noun, and they trigger plural verb agreement. As determiners, they have no singular forms — alcuno and alcuna exist but only in negative or formal contexts (see section 5 below).

The verb agrees with the plural noun: alcuni libri sono interessanti. The form chosen — alcuni or alcune — depends only on the gender of the noun.

3. The partitive dei / delle — "some" as a quantity

The third option is the partitive article: del, dello, dell', della, dei, degli, delle. Originally a way of saying "of-the" (literally di + il = del), the partitive evolved into a determiner that means "some" — a quantity drawn from a larger mass.

For our purposes — saying "some" with a plural meaning — the relevant forms are the plural ones: dei, degli, delle.

The partitive is the most colloquial of the three options for indefinite plurals — particularly common in northern Italy and in everyday speech. In writing and in more formal contexts, alcuni tends to be preferred.

For the full partitive system, including the singular forms (del pane, della carne), see The Partitive Article. This page focuses on the partitive only as a competitor of qualche and alcuni.

4. The three side by side

Here are the same idea expressed three ways:

The meaning is essentially identical. The differences are stylistic and grammatical:

• Qualche keeps the focus on kind rather than count. It is slightly more colloquial than alcuni and very common in everyday speech. The forced singular is its trademark.
• Alcuni / alcune is the most neutral choice. It works in every register, from casual chat to academic prose. If you are not sure which to use, alcuni / alcune is rarely wrong.
• Dei / delle is the most casual and the most regional. Frequent in northern Italian speech and informal writing; less common in the south, in formal writing, and at the start of a sentence (where it is sometimes considered slightly awkward).

5. Negative environments — choose nessun, not qualche

Italian's indefinite system is split between affirmative and negative environments. Qualche, alcuni, dei belong to the affirmative side: they assert the existence of some books, some friends, some doubts. In a negative sentence — "I don't have any book" — Italian uses nessuno / nessun / nessuna, not qualche.

The fully Italian solution is the negative determiner nessun with double negation (non + nessun). For full coverage, see Nessuno: No, None.

A historical note: the singular forms alcuno and alcuna were once the standard negatives — Non ho alcun dubbio ("I have no doubt at all") still survives in formal and literary Italian. In modern everyday Italian, nessun has largely displaced alcun in negative environments, though senza alcun dubbio ("without any doubt") and non c'è alcun motivo ("there's no reason") remain alive in elevated speech and writing.

For the everyday learner, treat alcun / alcuna as a recognition item — useful in formal contexts and fixed phrases, but not the default negative determiner.

6. Determiner versus pronoun

Both qualche and alcuni / alcune have related pronoun forms — words that stand alone without a noun. The two should not be confused.

The determiner sits in front of a noun; the pronoun stands alone, with no noun to modify. Qualche and qualcuno are not interchangeable — you cannot say qualche ha bussato meaning "someone knocked," nor qualcuno libro meaning "some book."

For the pronoun side of this system, see Indefinite Pronouns: Overview.

7. Comparison with English

English has a single determiner — some — that covers the territory Italian splits among three. The English speaker's instinct is to reach for plural agreement (some books, some friends) — which works fine when you choose alcuni / alcune or dei / delle, but fails dramatically with qualche. The form qualche libri — applying English plural logic to Italian qualche — is one of the most common A1 errors.

A second English habit to override: in English, "some" can sometimes be omitted in plural indefinite contexts. I bought books yesterday is a complete English sentence. The Italian equivalent normally requires a determiner: Ho comprato dei libri ieri / Ho comprato alcuni libri ieri / Ho comprato qualche libro ieri. The bare Ho comprato libri ieri is grammatically possible but sounds incomplete in most contexts — it stresses the category over a quantity, like English "I bought books, not magazines."

The bare-noun version is not wrong; it just answers a different question. The determined versions answer "what did you do last summer?"; the bare-noun version answers "did you read books, or did you read magazines?"

Common Mistakes

Key takeaways

• Qualche is invariable, takes a singular noun, but has plural meaning. Verb agreement follows the singular form: qualche libro è interessante.
• Alcuni / alcune inflect for gender and take a plural noun, with plural verb agreement: alcuni libri sono interessanti.
• Dei, degli, delle (the partitive article) offer a third route, very common in everyday speech, slightly less common in formal writing.
• The three are nearly synonymous and often interchangeable. Alcuni / alcune is the safest default.
• In negative environments, none of these three works — Italian uses nessun / nessuna with double negation. The historical alcun / alcuna survives in formal and fixed-phrase use (senza alcun dubbio).
• Qualche is a determiner; the related pronoun is qualcuno / qualcosa. They are not interchangeable.

For the negative side of the indefinite system, see Nessuno: No, None. For the partitive in full, see The Partitive Article. For the wider determiner family, see Determiners: Overview.