Indefinite Adjectives in Italian

In Brief

Italian indefinite adjectives describe a quantity or identity without specifying it exactly. The key beginner patterns are qualche + singular noun (“some”), alcuni/alcune + plural noun (“some”), ogni + singular noun (“every”), and tutto + definite article + noun (“all the”). Forms such as tutto, altro, and certo normally agree with the noun in gender and number.

Overview

An adjective is a word that adds information to a noun—the word for a person, thing, place, or idea. An indefinite adjective gives deliberately non-specific information: qualche domanda does not say exactly how many questions, while certi giorni does not identify the days precisely.

These forms appear constantly in everyday Italian: when discussing some friends, every morning, all the tickets, another coffee, or certain situations. They are introduced around A2 because they build on basic adjective agreement. Unlike English, Italian often changes the ending to match the noun’s grammatical gender and number. However, two very common forms, qualche and ogni, do not change and are followed by a singular noun even when the meaning involves several people or things.

The six core items in this lesson are not interchangeable. Qualche and alcuni/alcune can both mean “some,” but they require different noun forms. Ogni looks at the members of a group one by one; tutto presents the group or amount as complete. Altro adds or contrasts, while certo identifies something without naming it precisely.

How It Works

The core patterns

Italian pattern	Usual meaning	What follows
qualche domanda	some questions; a few questions	A singular noun, with no article
alcuni libri / alcune pagine	some books / some pages	A plural noun; the adjective agrees in gender
ogni giorno	every day	A singular noun, with no article
tutto il giorno / tutte le sere	the whole day / every evening	Usually a definite article, then a noun
un altro caffè / altre idee	another coffee / other ideas	A singular or plural noun; altro agrees
certi dettagli / una certa calma	certain details / a certain calm	A singular or plural noun; certo agrees

Qualche: singular grammar, non-singular meaning

Qualche is invariable: its form never changes. It is always followed by a singular noun, even though it usually refers to an unspecified small number.

• qualche minuto — a few minutes
• qualche domanda — some questions
• qualche amico — some friends

Do not add an article between qualche and the noun. Also, do not shorten it before a vowel: write qualche amico and qualche idea, not qualch’amico or qualch’idea.

English encourages learners to think in the plural because “some questions” is plural. Italian packages the same idea differently: qualche domanda. The verb still follows the grammatical number of the noun: Qualche studente è assente (“Some student or a few students are absent”) uses singular è. In many contexts, however, speakers prefer plural alcuni studenti sono assenti when clearly referring to several students.

Alcuni and alcune: the plural alternative

Alcuni and alcune mean “some” or “a few” and are used only with plural nouns. They agree in gender:

Gender	Form	Example	Meaning
Masculine plural	alcuni	alcuni colleghi	some colleagues
Feminine plural	alcune	alcune colleghe	some colleagues

There is usually no article: alcuni libri, not gli alcuni libri. Compared with qualche, these forms make plurality grammatically visible. In many ordinary sentences, qualche problema and alcuni problemi communicate nearly the same idea.

Ogni: every, followed by the singular

Ogni is also invariable and takes a singular noun without an article:

• ogni persona — every person
• ogni settimana — every week
• ogni errore — every error

The verb is singular when the ogni phrase is the subject: Ogni partecipante riceve un badge (“Every participant receives a badge”). English follows the same basic pattern with “every,” so the main trap is inserting an Italian article: ogni giorno, never ogni il giorno.

Ogni focuses on each member or occurrence in a complete set. For repeated time expressions, English may use “every,” “each,” or sometimes no direct equivalent: Ci vediamo ogni lunedì means “We meet every Monday.”

Tutto: all, every, or the whole

Tutto has four regular adjective forms:

Noun	Singular	Plural
Masculine	tutto	tutti
Feminine	tutta	tutte

Before an ordinary noun, the usual pattern is:

tutto/tutta/tutti/tutte + definite article + noun

• tutto il pane — all the bread
• tutta la città — the whole city
• tutti i documenti — all the documents
• tutti gli studenti — all the students
• tutte le finestre — all the windows

The article must have the form that the noun normally requires: therefore tutti gli amici but tutti i libri. A possessive does not remove this structure: tutti i miei amici (“all my friends”).

With a singular time word, tutto often means “the whole”: tutto il giorno is “all day” or “the whole day.” With a plural recurring time word, it can correspond to “every”: tutte le mattine means “every morning.” Contrast this with ogni mattina: both are common, but the first literally presents all the mornings as a set, while the second presents them one by one.

Altro: another, other, or the other

Altro agrees like a regular four-form adjective:

	Masculine	Feminine
Singular	altro	altra
Plural	altri	altre

The article changes the meaning and reference:

• un altro bicchiere — another glass / one more glass
• un’altra domanda — another question
• altri clienti — other customers
• le altre stanze — the other rooms
• l’altro lato — the other side

Before a singular countable noun, English “another” normally becomes un altro or un’altra. The feminine form combines with una by elision (dropping a vowel before another vowel): un’altra, with an apostrophe. Masculine un altro has no apostrophe.

Certo: a certain, certain, or some

As an indefinite adjective, certo agrees with its noun:

	Masculine	Feminine
Singular	certo	certa
Plural	certi	certe

Its common indefinite patterns include un certo motivo (“a certain reason”), una certa distanza (“a certain distance”), and certi comportamenti (“certain kinds of behavior” or “some behavior”). Here the speaker does not give an exact identity or deliberately leaves it vague.

Position matters. Before the noun, certo commonly has this indefinite sense. After the noun or after a linking verb, it can instead mean “certain” as in “sure/definite”: un risultato certo is “a definite result,” and Non sono certo is “I’m not sure.” Beginners can first master the before-noun patterns and treat the meaning “sure” as a separate use.

Examples in Context

Italian	English	Note
Ho qualche domanda.	I have some questions.	Qualche takes singular domanda.
Aspettiamo qualche minuto.	Let’s wait a few minutes.	A small, unspecified amount.
Alcuni studenti sono assenti.	Some students are absent.	Masculine plural.
Ho salvato alcune foto sul telefono.	I saved some photos on my phone.	Feminine plural.
Ogni giorno studio italiano.	Every day I study Italian.	Singular noun, no article.
Ogni cliente riceve una conferma.	Every customer receives a confirmation.	The subject and verb are singular.
Ho letto tutti i libri.	I read all the books.	Tutti comes before the definite article.
Marta ha lavorato tutta la notte.	Marta worked all night.	Feminine singular, “the whole night.”
Andiamo al mercato tutte le settimane.	We go to the market every week.	A recurring plural time phrase.
Vorrei un altro caffè, per favore.	I’d like another coffee, please.	Un altro means one more.
Possiamo provare un’altra strada.	We can try another route.	Feminine un’altra has an apostrophe.
Gli altri ospiti arrivano alle otto.	The other guests arrive at eight.	The article identifies the remainder of a known group.
Per certi problemi non esiste una soluzione rapida.	For certain problems, there is no quick solution.	The problems are not specified exactly.
Ho notato una certa tensione durante la riunione.	I noticed a certain tension during the meeting.	Deliberately vague singular reference.

Common Mistakes

Using a plural noun after qualche

• Wrong: Ho qualche domande.
• Right: Ho qualche domanda.
• Why: Qualche is always followed by a singular noun, even when English uses “some” plus a plural.

Using a singular noun after alcuni or alcune

• Wrong: Alcuni studente è assente.
• Right: Alcuni studenti sono assenti.
• Why: Alcuni/alcune are plural. The noun and, when relevant, the verb must also be plural.

Adding an article after ogni

• Wrong: Ogni il giorno leggo il giornale.
• Right: Ogni giorno leggo il giornale.
• Why: Ogni goes directly before a singular noun. It does not take a definite article.

Omitting the article after tutto

• Wrong: Ho controllato tutti documenti.
• Right: Ho controllato tutti i documenti.
• Why: Before an ordinary noun, tutto normally comes before the definite article: tutto il, tutta la, tutti i/gli, tutte le.

Confusing un altro and un’altra

• Wrong: Vorrei un’altro caffè.
• Right: Vorrei un altro caffè.
• Why: Masculine un already ends without a vowel and takes no apostrophe. Use the apostrophe in feminine un’altra idea.

Forgetting agreement with certo

• Wrong: Certo persone preferiscono aspettare.
• Right: Certe persone preferiscono aspettare.
• Why: Certo changes to match the noun: certo, certa, certi, certe.

Usage Notes

Qualche and alcuni/alcune are both neutral and common. Qualche often feels like an easy, compact way to suggest a limited number: Resto qui per qualche giorno. Alcuni/alcune can make the existence of several distinct members more noticeable: Alcuni colleghi lavorano da casa. The difference is often one of perspective rather than a precise numerical contrast.

Be careful when translating English “all.” Italian normally includes the definite article before a noun: “all my friends” is tutti i miei amici. But when tutto stands alone rather than describing a following noun, it may be a pronoun: Ho capito tutto (“I understood everything”). That belongs to the related topic of indefinite pronouns.

Certi/certe can sound mildly critical or distancing in the right context: Certi commenti sono inutili (“Some comments / certain comments are pointless”). The attitude comes from the whole sentence and tone, not from the adjective alone.

Beyond the Basics / Advanced Use

You do not need to master these finer points at A2, but you will encounter them later.

Ogni can be modified by a number to express regular intervals: ogni due settimane (“every two weeks”), ogni tre giorni (“every three days”). Although ogni itself normally introduces a singular noun, the counted unit is plural because it follows a number greater than one.

Qualche can occasionally mean “some ... or other” rather than clearly “a few”: Troveremo qualche soluzione may mean “We’ll find some solution” or “We’ll find a few solutions,” depending on context. Its fixed singular construction remains unchanged.

Italian also has ciascun/ciascuna (“each”), which resembles ogni but has its own forms and distribution. In addition, altro and tutto can function without a following noun: Ne vuoi un altro? (“Do you want another one?”), Gli altri sono già partiti (“The others have already left”), and Tutto è pronto (“Everything is ready”). In those sentences they are pronouns—they replace the noun rather than describing it.

Finally, the position of an adjective may shape its meaning. Compare una certa notizia (“a certain piece of news,” identity left unspecified) with una notizia certa (“a confirmed/certain piece of news”). This before-versus-after contrast is useful in careful writing, but the beginner-safe pattern is un/una certo/a + noun for “a certain.”

Practice Tips

1. Build paired examples. Take five plural nouns and write both versions: qualche libro / alcuni libri, qualche domanda / alcune domande. This trains the singular–plural switch without changing the basic meaning.
2. Learn tutto as a complete chunk with the article. Say tutto il, tutta la, tutti i, tutti gli, tutte le aloud, then add familiar nouns. This is more reliable than translating “all” word by word.
3. Sort phrases by function. While reading or listening, collect examples under “some” (qualche, alcuni), “every/all” (ogni, tutto), and “other/certain” (altro, certo). Note the noun’s gender and number each time.

Related Concepts

• Prerequisite: Regular Adjectives — review the basic gender and number agreement used by tutto, altro, and certo.
• Next step: Indefinite Pronouns — learn forms such as qualcuno, qualcosa, nessuno, and uses where tutto or altro replaces a noun.