Capire: Full Conjugation | Italian Grammar

Capire (to understand) is the textbook -isco -ire verb — the model for the open and productive class of -ire verbs that take the -isc- infix. This class contains hundreds of verbs, and any new -ire verb that enters Italian will join it: capire, finire, preferire, pulire, spedire, costruire, dimagrire, fornire, gestire, suggerire. Master capire and you have the conjugation skeleton for all of them.

The pedagogical centre of gravity on this page is one rule: the -isc- infix appears in exactly four "corner" forms of the present indicative — the three singulars (1sg, 2sg, 3sg) and the 3pl — and in the matching four forms of the present subjunctive. Everywhere else — 1pl and 2pl present, every other tense, every non-finite form — the verb conjugates like a plain -ire verb without the infix. The shape on the page looks like a "1-2-3, gap, gap, 6" pattern: four forms with the -isc-, two without.

This pattern feels arbitrary, but it has a clear historical source. The infix -isc- is a fossil of the Latin inceptive suffix -ESC- (inherited via -iscere), which originally marked the beginning of an action (to start to understand → to understand). Over time the inceptive sense bleached out, leaving only the formal marker. Crucially, the Latin inceptive only appeared in stem-stressed forms — and the four "corner" forms of the Italian present (singular + 3pl) are precisely the stem-stressed ones. The 1pl and 2pl forms shift stress to the ending, and that's where the inceptive disappears. The pattern isn't random; it's the ghost of stress.

Etymologically, capire descends from Vulgar Latin capīre, an alteration of classical capere (to take, to seize, to grasp). The semantic shift from grasp physically to grasp mentally is universal across languages — English grasp itself does the same thing, and comprendere (Italian) and comprehend (English) both come from Latin comprehendere (to take hold of together). To understand is, in the Romance imagination, to take something into yourself.

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The -isco infix appears in exactly four forms of the present indicative: 1sg (capisco), 2sg (capisci), 3sg (capisce), 3pl (capiscono). The 1pl (capiamo) and 2pl (capite) drop it. The same four-vs-two split repeats in the present subjunctive: capisca/capisca/capisca + capiscano have the infix; capiamo/capiate don't. Outside these two tenses, the infix is gone: imperfetto, passato remoto, future, conditional, imperfect subjunctive, gerund, participle — all use the plain stem capi-.

Indicativo presente

Person	Form	Pronunciation
io	capisco	/kaˈpisko/
tu	capisci	/kaˈpiʃʃi/
lui / lei / Lei	capisce	/kaˈpiʃʃe/
noi	capiamo	/kaˈpjamo/
voi	capite	/kaˈpite/
loro	capiscono	/kaˈpiskono/

The four "corner" forms have the -isc- chunk pinned in the middle: capi-*sc-o, capi-sc-i, capi-sc-e, capi-sc-ono. The 1pl *capiamo and 2pl capite drop the infix and conjugate like plain -ire verbs.

Crucial pronunciation point: the sc digraph sounds different depending on what follows. sc + a / o / u = /sk/ (the hard "sk" sound). sc + e / i = /ʃ/ (the soft "sh" sound — like English sh). So in the same paradigm:

capisco = ka-PEES-ko (sc + o = /sk/)
capisci = ka-PEE-shee (sc + i = /ʃ/)
capisce = ka-PEE-she (sc + e = /ʃ/)
capiscono = ka-PEES-ko-no (sc + o = /sk/)

The sound switches from /sk/ to /ʃ/ to /ʃ/ to /sk/ across the four forms. This is automatic — same rule that operates in scuola /skuola/ vs sciare /ʃare/ — but it does require conscious attention until it becomes automatic.

Stress is on the -isc- in all four corner forms (ca-PI-sko, ca-PI-shi, ca-PI-she, ca-PI-sko-no) and shifts to the ending in noi and voi (ca-PIA-mo, ca-PI-te). Notice that the 3pl capiscono is stressed on the -isc- — ca-PI-sko-no — not on the -co-. This is different from the loro form of pure -ire, -are, and -ere verbs, which stress the root (DOR-mo-no, PAR-la-no, SCRI-vo-no). The -isc- infix carries its own stress.

Capisco l'italiano abbastanza bene, ma non lo parlo ancora fluentemente.

I understand Italian fairly well, but I don't speak it fluently yet.

Non capisci quanto sia difficile per me?

Don't you understand how hard this is for me?

Mio padre non capisce l'inglese, parla solo italiano e dialetto.

My father doesn't understand English — he only speaks Italian and dialect.

Capiamo benissimo le tue ragioni, ma non possiamo accettarle.

We fully understand your reasons, but we can't accept them.

Voi capite quello che dico o devo ripetere?

Do you understand what I'm saying, or should I repeat?

I bambini non capiscono ancora la differenza tra giusto e sbagliato.

The kids don't yet understand the difference between right and wrong.

The -isco vs no-isco split — visualised

The split between the four "corner" forms and the noi/voi pair is the single most distinctive feature of the -isco pattern. Memorise this picture:

Person	Form	-isc- present?
io	capisco	YES
tu	capisci	YES
lui / lei	capisce	YES
noi	capiamo	NO
voi	capite	NO
loro	capiscono	YES

There are no exceptions to this split within the -isco class. Every -isco verb does exactly this: four corner forms with -isc-, two middle forms (noi/voi) without.

Imperfetto

Person	Form
io	capivo
tu	capivi
lui / lei / Lei	capiva
noi	capivamo
voi	capivate
loro	capivano

No -isc- here. The imperfetto is built on the plain stem capi- + the standard -ire imperfect marker -iv- + person endings. This pattern is identical to dormivo, sentivo, partivo — pure -ire and -isco verbs converge in every tense outside the present and present subjunctive.

The imperfetto is the standard tense for "I used to understand", "I was understanding", "we didn't understand at the time."

Da bambino non capivo perché gli adulti fossero sempre stanchi.

As a kid I didn't understand why grown-ups were always tired.

Quando viaggiavamo in Francia, capivamo poco ma ci facevamo capire.

When we used to travel to France, we understood little but made ourselves understood.

Mia nonna non capiva una parola di inglese, ma ascoltava sempre.

My grandmother didn't understand a word of English, but she always listened.

Passato remoto

Person	Form
io	capii
tu	capisti
lui / lei / Lei	capì
noi	capimmo
voi	capiste
loro	capirono

No -isc- here either. Standard -ire passato remoto on the plain stem capi-. The 1sg capii has a doubled i; the 3sg capì carries a mandatory grave accent on the final -ì. Double m in 1pl capimmo.

The passato remoto of capire is iconic in literary moments: capì che era troppo tardi ("she understood it was too late"). It marks a single, decisive realisation in narrative.

Capii subito che mi stava mentendo, ma non dissi nulla.

I understood right away that he was lying to me, but I said nothing. (literary)

Solo dopo molti anni capirono il vero significato di quelle parole.

Only after many years did they understand the true meaning of those words.

Futuro semplice

Person	Form
io	capirò
tu	capirai
lui / lei / Lei	capirà
noi	capiremo
voi	capirete
loro	capiranno

No -isc- here. The future stem is capir- — plain stem + the future thematic vowel -ir-. Mandatory grave on the 1sg and 3sg: capirò, capirà. The thematic vowel of -ire verbs stays as -i- in the future and conditional (unlike -are, where it shifts to -e-): capire → capirò, partire → partirò, dormire → dormirò.

The futuro is famously used in Italian to express resignation or acceptance: capirai un giorno ("you'll understand one day"). It softens an assertion into something the listener will eventually grasp.

Capirai quando sarai più grande, è una cosa da adulti.

You'll understand when you're older — it's a grown-up thing.

Quando avrò studiato meglio l'argomento, capirò la lezione.

When I've studied the topic better, I'll understand the lesson.

Non si capiranno mai, parlano due lingue diverse.

They'll never understand each other — they speak two different languages. (figurative)

Condizionale presente

Person	Form
io	capirei
tu	capiresti
lui / lei / Lei	capirebbe
noi	capiremmo
voi	capireste
loro	capirebbero

No -isc- here. Same capir- stem as the future, with the standard conditional endings. The double-m trap: capiremmo (conditional, double m) vs capiremo (future, single m).

Capirei meglio se parlassi più lentamente.

I'd understand better if you spoke more slowly.

Non capiremmo mai i suoi motivi senza una spiegazione completa.

We'd never understand his reasons without a full explanation.

Congiuntivo presente

Person	Form
(che) io	capisca
(che) tu	capisca
(che) lui / lei	capisca
(che) noi	capiamo
(che) voi	capiate
(che) loro	capiscano

The -isc- returns here. The four corner forms — three singulars + 3pl — have the infix again: capisca, capisca, capisca, capiscano. The three singulars collapse into capisca, identical except for context. The 1pl capiamo and 2pl capiate drop the infix, exactly as in the present indicative.

The 3pl capiscano ends in -ano — note the /sk/ sound (sc + a = hard /sk/), parallel to capiscono in the indicative.

This is the second and last tense where -isc- appears. After this, you'll see plain stems everywhere.

Spero che tu capisca quello che voglio dire.

I hope you understand what I mean.

Bisogna che lui capisca subito la gravità della situazione.

He needs to understand the seriousness of the situation right away.

È importante che voi capiate la regola prima di andare avanti.

It's important that you understand the rule before moving on.

Non credo che capiscano davvero quanto sia difficile.

I don't think they really understand how difficult it is.

Congiuntivo imperfetto

Person	Form
(che) io	capissi
(che) tu	capissi
(che) lui / lei	capisse
(che) noi	capissimo
(che) voi	capiste
(che) loro	capissero

No -isc- here. Standard -ire subjunctive imperfect: stem capi- + the -iss- marker + endings. Indistinguishable from a pure -ire verb — capissi, dormissi, sentissi all follow the same pattern.

Se capissi meglio l'inglese, lavorerei all'estero.

If I understood English better, I'd work abroad.

Pensavo che capisse il problema, invece era confuso anche lui.

I thought he understood the problem, but he was confused too.

Imperativo

Person	Form
tu	capisci!
Lei (formal)	capisca
noi	capiamo
voi	capite
loro (archaic)	capiscano

The tu imperative of -isco verbs is the same as the 2sg present indicative: capisci! The Lei (formal) imperative borrows the congiuntivo presente: capisca, signora. The noi and voi imperatives drop the -isc-, parallel to the indicative: capiamo!, capite!

The imperative of capire is rhetorical more than directional: you can't really order someone to understand. But Italian uses it as a discourse marker for emphasis: capisci? ("you get it?"), capiscimi ("understand me / try to see my point").

Capisci che non posso più fingere niente, ti prego.

Understand that I can't pretend anymore, please.

Non capire mai male le mie intenzioni, ti voglio bene.

Never misunderstand my intentions — I love you.

Capisca, signora, le regole sono uguali per tutti.

Please understand, ma'am — the rules are the same for everyone. (formal)

Forme non finite

Form	Italian
Infinito presente	capire
Infinito passato	avere capito / aver capito
Gerundio presente	capendo
Gerundio passato	avendo capito
Participio passato	capito

No -isc- in any non-finite form. The participle capito is fully regular. The gerund capendo ends in -endo (the universal pattern for -ire and -ere verbs). The auxiliary is always avere — never essere.

Avendo capito il problema, posso aiutarti a risolverlo.

Having understood the problem, I can help you solve it.

Sto capendo solo ora cosa volevi dire l'altra sera.

I'm only now understanding what you meant the other evening.

Compound tenses

Tense	io	noi
Passato prossimo	ho capito	abbiamo capito
Trapassato prossimo	avevo capito	avevamo capito
Trapassato remoto	ebbi capito	avemmo capito
Futuro anteriore	avrò capito	avremo capito
Condizionale passato	avrei capito	avremmo capito
Congiuntivo passato	abbia capito	abbiamo capito
Congiuntivo trapassato	avessi capito	avessimo capito

The passato prossimo ho capito is one of the most heavily used phrases in conversational Italian — its functional range overlaps with English I see, I get it, got it, understood, OK. It's the universal acknowledgement.

Ho capito, non ti preoccupare, faccio io.

Got it — don't worry, I'll do it.

Se avessi capito prima, non avrei detto quella cosa.

If I'd understood earlier, I wouldn't have said that.

Other common -isco verbs

The -isco class is open and productive — these are some of the highest-frequency members. Each conjugates exactly like capire, with -isc- in the four corner forms of present and subjunctive present and nowhere else.

Verb	Meaning	1sg present
finire	to finish	finisco
preferire	to prefer	preferisco
pulire	to clean	pulisco
spedire	to send (mail, parcels)	spedisco
costruire	to build	costruisco
dimagrire	to lose weight	dimagrisco
fornire	to provide, supply	fornisco
gestire	to manage	gestisco
suggerire	to suggest	suggerisco
tradire	to betray	tradisco
guarire	to heal, recover	guarisco
chiarire	to clarify	chiarisco

There's no rule that predicts which -ire verbs take -isco; it's a list to memorise. The -isco group is the productive default — when in doubt about a new -ire verb, it's probably -isco. The pure -ire group (without the infix) is a closed list of 40-50 verbs: see dormire for the model.

Finisco di lavorare alle sei, poi ci vediamo.

I finish work at six, then we'll meet up.

Preferisco il caffè senza zucchero, grazie.

I prefer coffee without sugar, thanks.

Idioms with capire

Italian uses capire in dozens of fixed phrases — many of them conversational fillers and emphatic markers.

Italian	Literal	Idiomatic English
capire al volo	to understand on the wing	to catch on quickly, to get it instantly
non capire un'acca	to not understand an "h"	to not understand a thing
non ci capisco niente / un cavolo	I understand nothing of it	I don't get it at all
fare capire (qualcosa a qualcuno)	to make someone understand	to get something across, make clear
farsi capire	to make oneself understood	to be understood, get one's point across
capirai!	you'll understand!	(sarcastic) yeah right! / big deal! / sure thing!
capisci a me	you understand me (Southern Italian)	you know what I mean (regional, very informal)
capire fischi per fiaschi	to understand whistles for flasks	to get the wrong end of the stick
chi vuol capire capisca	let those who want to understand, understand	read between the lines / take the hint

Marco capisce sempre tutto al volo, non bisogna ripetere.

Marco always catches on instantly — no need to repeat.

Di matematica non capisco un'acca, ti giuro.

I don't understand a thing about math, I swear.

Non ci capisco niente di questi nuovi telefoni, troppe funzioni.

I don't get these new phones at all — too many features.

Devo farmi capire, anche con il mio italiano scarso.

I need to make myself understood, even with my poor Italian.

Ha vinto un premio. — Capirai! Era l'unico in gara.

He won an award. — Big deal! He was the only contestant. (sarcastic)

Ha capito fischi per fiaschi e ora pensa che siamo arrabbiati con lui.

He got the wrong end of the stick and now he thinks we're angry with him.

Common mistakes

❌ Noi capisciamo l'italiano.

Incorrect — the -isc- infix DOESN'T appear in 1pl. Capisciamo over-extends the rule.

✅ Noi capiamo l'italiano.

Correct — 1pl drops the infix: capiamo, capite (no -isc-).

❌ Voi capiscite la lezione?

Incorrect — same error in 2pl. The -isc- infix doesn't reach voi.

✅ Voi capite la lezione?

Correct — 2pl drops the infix: capite (plain -ire ending).

❌ Io capisco il film mentre lo guardavo.

Incorrect tense mix — capisco is present, guardavo is imperfect. Pick one tense.

✅ Capivo il film mentre lo guardavo. / Capisco il film mentre lo guardo.

Correct — both verbs in past (capivo, guardavo) or both in present (capisco, guardo).

❌ Loro capisciono tutto al volo.

Incorrect — the 3pl is capiscono with /sk/ sound (sc + o), not capisciono with /ʃ/.

✅ Loro capiscono tutto al volo.

Correct — capiscono = ka-PEES-ko-no, hard /sk/.

❌ Capivisco la lezione.

Incorrect — the -isc- infix appears ONLY in present and present subjunctive, not in the imperfect.

✅ Capivo la lezione.

Correct — imperfetto uses the plain stem: capivo.

❌ Sono capito perché sei arrabbiato.

Incorrect — capire takes avere, never essere.

✅ Ho capito perché sei arrabbiato.

Correct — auxiliary avere is invariable for capire.

❌ Penso che tu capisci.

Incorrect — penso che triggers the subjunctive.

✅ Penso che tu capisca.

Correct — capisca is the congiuntivo presente.

❌ Domani capiscero tutto.

Incorrect — the -isc- doesn't appear in the future, AND the 1sg needs the grave accent.

✅ Domani capirò tutto.

Correct — capirò: plain stem + future ending + grave accent.

Key takeaways

Capire is the canonical -isco -ire verb, and learning it gives you the slot pattern for hundreds of others. The pedagogical centre is one rule: the -isc- infix appears in exactly the four corner forms of the present and present subjunctive, and nowhere else.

Six points to internalise:

The four-vs-two split. Present indicative: capisco, capisci, capisce, [capiamo, capite], capiscono. Same split in present subjunctive: capisca, capisca, capisca, [capiamo, capiate], capiscano. The corner forms have -isc-; the middle pair doesn't.
No -isc- outside the present and subjunctive present. Imperfetto, passato remoto, future, conditional, imperfect subjunctive, all non-finite forms — every one of these uses the plain stem capi-. Don't overextend the infix.
The sc digraph switches sound automatically. Capisco /sk/, capisci /ʃ/, capisce /ʃ/, capiscono /sk/. Same rule that operates everywhere in Italian: sc + a/o/u = /sk/, sc + e/i = /ʃ/.
The thematic vowel stays as -i- in the future and conditional: capire → capirò → capirei. Same for all -ire verbs.
Auxiliary is always avere. Ho capito, hai capito, abbiamo capito — never essere.
The -isco class is open and productive. When in doubt about a new -ire verb, it almost certainly takes -isco. The pure -ire group (no infix — dormire, sentire, partire) is a closed list of common verbs you must memorise separately.

For the contrastive pure -ire pattern, see dormire. For the systematic treatment of the -isco subgroup, see presente: -isco -ire verbs.

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