🔍 In short. Italian per idioms are the fixed expressions built on the small preposition per. The big four are stare per + infinitive (“to be about to”), per poco non (“almost”, with a pleonastic non), per + a time span (“for three hours”), and a long list of frozen adverbials: per caso (by chance), per fortuna (luckily), per forza (necessarily), per sbaglio (by mistake), per scherzo (as a joke), per ora (for now), per lo più (mostly), per filo e per segno (in full detail). They are everyday A2 building blocks, learned whole rather than analysed.

Get the italian per idioms right and a big chunk of natural speech opens up: “I am about to leave”, “I almost missed it”, “luckily”, “by mistake”. By the end you will use the four core patterns and the frozen phrases without translating word by word.

What Italian PER idioms are

The preposition per on its own means “for”, “through”, “in order to”. But it also anchors a cluster of set phrases whose meaning you cannot get by translating the parts. These italian per idioms are fixed: per poco non does not mean “for little not”, it means “almost”; per forza is not “for force”, it is “necessarily”.

There are two kinds. A few are productive grammar patterns you can build (stare per + infinitive, per + a duration). Most are frozen adverbials you simply memorise as units. This guide sorts the italian per idioms into both groups so you know which to build and which to learn by heart.

Stare per + infinitive: to be about to

The most useful productive pattern among the italian per idioms is stare per + infinitive. It means an action is on the very edge of happening, “to be about to”.

• Sbrigati, il treno per Modena sta per partire!
  Hurry up, the train to Modena is about to leave!
• Stavamo per entrare quando è arrivato Pietro.
  We were about to go in when Pietro arrived.
• Prendi l’ombrello, sta per piovere.
  Take the umbrella, it is about to rain.

The strength of stare per is that it works for any subject, including the weather (sta per piovere). The more formal alternatives essere sul punto di and essere in procinto di only work with a deliberate human subject, so within the italian per idioms stare per is the everyday default.

Per poco non: almost, by a hair

This is the trap of the italian per idioms for English speakers. Per poco non + verb means the event almost happened but did not. The non is pleonastic: it does not negate, it marks the near miss.

• Per poco non perdevo la coincidenza, sono salito all’ultimo secondo.
  I almost missed the connection, I got on at the last second. (I did catch it)
• Per poco non cadevo dalle scale con le scatole in mano.
  I almost fell down the stairs with the boxes in my hands.
• Che gara: per poco non vincevamo il campionato.
  What a match: we almost won the league.

The close cousin per un pelo (“by a hair”) is used the same way: l’ho preso per un pelo (“I caught it by a hair”). Both are core italian per idioms for narrow escapes. The verb after per poco non is usually the imperfetto.

Per + a time span

A productive pattern among the italian per idioms: per + a length of time marks how long something lasts. English “for” maps onto it directly.

• Il concerto è durato per tre ore.
  The concert lasted for three hours.
• Ho vissuto a Padova per cinque anni.
  I lived in Padua for five years.
• Resto a Lucca per tutta l’estate.
  I am staying in Lucca for the whole summer.

One natural simplification: after inherently durative verbs like durare or aspettare, the per is often dropped. Dovettero aspettare otto mesi (“they had to wait eight months”) needs no per. So in the italian per idioms of time, per is available but not always obligatory.

The frozen adverbials: per caso, per fortuna

This is the long tail of the italian per idioms: fixed adverbial phrases you cannot build, only memorise. They are extremely frequent in everyday speech.

• per caso (by chance): Ho incontrato Caterina per caso davanti alla biblioteca.
  I met Caterina by chance in front of the library.
• per fortuna (luckily): Per fortuna Pietro aveva un ombrello.
  Luckily Pietro had an umbrella.
• per forza (necessarily, against one’s will): Devo per forza finire il restauro entro venerdì.
  I really have to finish the restoration by Friday, no choice.
• per sbaglio (by mistake): Mi ha dato per sbaglio il numero di Elena.
  He gave me Elena’s number by mistake.
• per scherzo (as a joke): L’ha detto solo per scherzo, non offenderti.
  He said it only as a joke, do not be offended.
• per ora (for now): Per ora riposati, il resto lo vediamo domani.
  For now rest, we will see the rest tomorrow.
• per lo più (mostly): I turisti a Lucca sono per lo più nordeuropei.
  The tourists in Lucca are mostly northern Europeans.
• per filo e per segno (in full detail): Elena mi ha spiegato la faccenda per filo e per segno.
  Elena explained the matter to me down to the last detail.
• per le lunghe (to drag on): Con la burocrazia la pratica rischia di andare per le lunghe.
  With the bureaucracy the paperwork risks dragging on.
• per via di (because of): È difficile viaggiare per via di uno sciopero.
  It is hard to travel because of a strike.

Add per esempio (for example), per sempre (forever), per mezzo di (by means of) and per giunta (moreover) and you have the working set. The only way to own these italian per idioms is exposure: meet them in context, reuse them as blocks.

Finire per and per quanto

Two more patterns round out the italian per idioms at the A2 to B1 edge.

• finire per + infinitive (to end up doing): A forza di rimandare, ho finito per perdere l’occasione.
  By keeping postponing, I ended up missing the chance.
• per quanto + subjunctive (however much, although): Per quanto sia stanca, Caterina finisce il lavoro.
  However tired she is, Caterina finishes the job.
• stare per vs stare + gerund: sta per partire (about to) versus sta partendo (in the act of).

Finire per is the mild-regret cousin of finire di; per quanto is a concessive that takes the subjunctive. Both stretch the italian per idioms toward B1, but they are worth meeting early because they are common.

Per for purpose: ti scrivo per dirti

Behind many of the italian per idioms sits the most basic job of per: introducing a purpose, “in order to”. With an infinitive it builds the implicit final clause, the everyday way to say why you do something when both clauses share the same subject.

• Ti scrivo per dirti che arrivo domani.
  I am writing to you to tell you I am arriving tomorrow.
• Sono passato in officina per ritirare il preventivo.
  I dropped by the workshop to collect the quote.
• Studio il tedesco per lavorare a Padova.
  I am studying German in order to work in Padua.

This per + infinitive is the implicit twin of the explicit final clause with affinché + subjunctive: ti scrivo per dirti (same subject) versus ti scrivo affinché tu sappia (different subjects). Recognising this purpose per is what makes the rest of the italian per idioms feel logical rather than random.

More fixed phrases worth knowing

A second batch of frozen italian per idioms rounds out the everyday set. Add these once the core ten are solid.

• per esempio (for example): Conoscere le lingue è utile: per esempio, in viaggio.
  Knowing languages is useful: for example, when travelling.
• per sempre (forever): Caterina si è trasferita a Lucca per sempre.
  Caterina moved to Lucca for good.
• per mezzo di (by means of): Ho avuto lo sconto per mezzo di un amico.
  I got the discount through a friend.
• per giunta (on top of that): È arrivato tardi e per giunta non si è scusato.
  He arrived late and on top of that did not apologise.
• per conto di (on behalf of): Telefono per conto di mia madre.
  I am calling on behalf of my mother.

Like the first set, these italian per idioms resist literal translation and are best stored as ready-made chunks. The more you read, the faster they move from recognition to active use.

One practical habit speeds this up. When you meet a new per phrase in a text, write the whole sentence, not just the phrase, so you keep the context that tells you when to use it. A ten-minute daily reading of a newspaper or a novel will surface most of the italian per idioms in natural settings within a few weeks, far faster than memorising a bare list, because you see each idiom doing a real job in a real sentence. Treat the cheat sheet below as a map, not as the territory: the italian per idioms stick only once you have heard and reused them yourself.

Cheat sheet: italian per idioms

The whole set on one card. Keep it open and reuse the phrases as blocks.

Common mistakes English speakers make with italian per idioms

• Reading per poco non as a negative. ❌ “per poco non cadevo” = “I did not fall”. ✅ It means “I almost fell”.
• Stare + infinitive without per. ❌ Sto partire. ✅ Sto per partire (about to) or sto partendo (in the act).
• Translating the frozen phrases literally. ❌ “per forza” = “for force”. ✅ It means “necessarily / against one’s will”.
• Indicative after per quanto. ❌ per quanto è tardi. ✅ per quanto sia tardi (subjunctive).
• Confusing finire per and finire di. Ho finito di lavorare (stopped) is not ho finito per lavorare (ended up working).

For the expletive non in detail, see our guide on Italian pleonastic non. For the base preposition, Italian simple prepositions. For the contrast with the progressive, Italian stare + gerundio. The institutional reference is the Accademia della Crusca note on the uso delle preposizioni.

Dialog: at the Lucca station

Pietro and Caterina catch a delayed train at Lucca. The dialog runs the italian per idioms across stare per, per poco non, and the frozen adverbials.

Count them: sta per partire, per poco non, per fortuna, per sbaglio, per forza, per caso, per filo e per segno, per ora, per le lunghe. One short trip runs the everyday core of the italian per idioms.

Test your understanding

The quiz below drills the italian per idioms: stare per, per poco non, the time pattern and the frozen adverbials. Take it after the cheat sheet.

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Frequently asked questions

Seven questions about the italian per idioms come up in every A2 cohort. The answers draw on classroom usage and on the Accademia della Crusca note on the uso delle preposizioni.

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Related guides

Three guides that pair with the italian per idioms, plus an institutional reference.

• Italian Pleonastic Non: the expletive non in per poco non.
• Italian Simple Prepositions: the preposition per and the other seven.
• Italian Stare + Gerundio: sta per partire versus sta partendo.
• Accademia della Crusca: uso delle preposizioni: institutional note.