Sapere: Full Conjugation | Italian Grammar

Sapere translates as "to know," but only in the sense of knowing facts, knowing how to do something, or finding out. It does not mean "to be acquainted with" (a person, a place, a piece of music) — that role belongs to conoscere. The two verbs split the English word to know between them, and using the wrong one is one of the most visible errors an English speaker makes in Italian.

The conjugation is irregular at the corners. The presente has the unusual one-syllable form so in the first person singular and a doubled consonant sappiamo in the noi form. The passato remoto throws a 1-3-3 with seppi/seppe/seppero. The futuro and condizionale contract to sapr-. The congiuntivo presente reaches for the doubled stem sappia (NOT sapia). And the participio passato saputo in the passato prossimo carries a special inceptive reading: l'ho saputo ieri means "I found out yesterday," not "I knew yesterday."

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The cleanest way to keep sapere and conoscere apart: if you can replace "I know" with "I am aware of [a fact]" or "I know how to [do X]," use sapere. If you can replace it with "I am acquainted with [a person, place, or thing]," use conoscere. So che è arrivato (I know he's arrived → fact → sapere). Conosco Roma (I know Rome → acquaintance → conoscere).

Indicativo presente

Person	Form
io	so
tu	sai
lui / lei / Lei	sa
noi	sappiamo
voi	sapete
loro	sanno

The pattern is striking: io so (one syllable, no h, no accent — written exactly like the conjunction so nowhere because so doesn't exist as another word, so no diacritic is needed). The lui form sa is also accent-free. Then sappiamo with double pp comes out of nowhere — a survival of the Latin sapĭamus. The voi sapete is the only "regular-looking" form, and sanno with double n parallels hanno (avere) and vanno (andare).

So che sembra strano, ma è la verità.

I know it sounds strange, but it's the truth.

Sai dove ho messo le chiavi della macchina?

Do you know where I put the car keys?

Mia figlia sa già leggere e scrivere.

My daughter already knows how to read and write.

Non sappiamo ancora a che ora arriva il treno.

We don't know yet what time the train arrives.

Sapete cosa? Cambiamo programma.

You know what? Let's change plans.

I miei genitori non sanno che mi sono trasferito.

My parents don't know that I've moved.

Imperfetto

Person	Form
io	sapevo
tu	sapevi
lui / lei / Lei	sapeva
noi	sapevamo
voi	sapevate
loro	sapevano

Fully regular -ere imperfetto on the stem sap-. The imperfetto carries the durative reading "I knew (and was knowing)" — the natural past for talking about something that was already in your mental possession.

Non sapevo che fossi tornato in città.

I didn't know you were back in town.

Da bambini sapevamo tutti i nomi delle squadre di calcio.

As kids we used to know all the soccer team names.

Passato remoto

Person	Form
io	seppi
tu	sapesti
lui / lei / Lei	seppe
noi	sapemmo
voi	sapeste
loro	seppero

A textbook 1-3-3 with the doubled-consonant stem sepp- in io/lui/loro and the regular sap- in tu/noi/voi. Like the passato prossimo (see below), the passato remoto of sapere carries the inceptive reading: seppi la notizia il giorno dopo = "I found out the news the next day."

Seppe la verità solo molti anni dopo.

He found out the truth only many years later.

Quando seppero del matrimonio, organizzarono subito una festa.

When they found out about the wedding, they immediately organised a party.

Futuro semplice

Person	Form
io	saprò
tu	saprai
lui / lei / Lei	saprà
noi	sapremo
voi	saprete
loro	sapranno

Sapere belongs to the family of -ere verbs whose future and conditional contract by dropping the unstressed e of the infinitive: sapere → sapr- (compare avere → avr-, dovere → dovr-, potere → potr-, vedere → vedr-, vivere → vivr-).

The futuro of sapere also gets used for conjecture about the future (when you'll know): Saprò domani ("I'll know tomorrow"). And in negation it does duty as a polite hedge: Non saprei ("I wouldn't know").

Saprò la risposta entro stasera.

I'll know the answer by tonight.

Non sapranno mai cosa è successo davvero.

They'll never know what really happened.

Condizionale presente

Person	Form
io	saprei
tu	sapresti
lui / lei / Lei	saprebbe
noi	sapremmo
voi	sapreste
loro	saprebbero

The conditional non saprei is heard constantly in conversation as a polite "I'm not sure / I wouldn't know." It softens an admission of ignorance the way English uses "I couldn't really say." Watch the now-classic trap: sapremo (future) vs. sapremmo (conditional, double m).

Non saprei davvero cosa risponderti.

I really wouldn't know how to answer you.

Sapresti dirmi dov'è la stazione?

Could you tell me where the station is?

Congiuntivo presente

Person	Form
(che) io	sappia
(che) tu	sappia
(che) lui / lei	sappia
(che) noi	sappiamo
(che) voi	sappiate
(che) loro	sappiano

The doubled-consonant stem sappi- comes back here, parallel to abbia (avere). NOT sapia — this is a frequent learner spelling error. The three singular forms collapse into sappia, and the noi form sappiamo is identical to the indicativo.

Spero che tu sappia cosa stai facendo.

I hope you know what you're doing.

È importante che tutti sappiano la verità.

It's important that everyone know the truth.

Congiuntivo imperfetto

Person	Form
(che) io	sapessi
(che) tu	sapessi
(che) lui / lei	sapesse
(che) noi	sapessimo
(che) voi	sapeste
(che) loro	sapessero

Fully regular on the stem sap- with the standard -essi/-esse pattern. Heard constantly in se lo sapessi... ("if I knew...").

Se sapessi suonare il pianoforte, suonerei in pubblico.

If I knew how to play the piano, I'd play in public.

Pensavo che sapessero già la notizia.

I thought they already knew the news.

Imperativo

Person	Form
tu	sappi
Lei (formal)	sappia
noi	sappiamo
voi	sappiate
loro (formal pl.)	sappiano

The imperative is built on the same doubled stem and is most often heard in fixed exhortations: sappi che... ("know that..."), sappi che ti voglio bene ("know that I love you"). It conveys a kind of solemnity — when you tell someone sappi che, you are about to deliver something they need to take seriously.

Sappi che puoi sempre contare su di me.

Know that you can always count on me.

Sappiate che la decisione è già stata presa.

Be aware that the decision has already been made.

Forme non finite

Form	Italian
Infinito presente	sapere
Infinito passato	aver saputo
Gerundio presente	sapendo
Gerundio passato	avendo saputo
Participio passato	saputo

The participle saputo is regular in form. Its semantics, however, are not — see the next section.

Sapendo che eri stanco, non ti ho chiamato.

Knowing that you were tired, I didn't call you.

Compound tenses — the inceptive reading

Sapere takes avere as its auxiliary. The participle saputo does not agree with the subject (only with a preceding direct-object pronoun, per the standard rule).

But here is the genuinely tricky part: when sapere is used in the passato prossimo (and to a lesser extent the passato remoto), it usually carries an inceptive reading — that is, it describes the moment of finding out, not a state of knowing.

Form	Reading
Sapevo che era arrivato.	I knew (durative state) that he had arrived.
Ho saputo che era arrivato.	I found out (point in time) that he had arrived.

L'ho saputo dai giornali stamattina.

I found out about it from the papers this morning.

Quando hai saputo che si erano sposati?

When did you find out they had gotten married?

This same inceptive shift happens with conoscere in the passato prossimo (l'ho conosciuto = "I met him for the first time"), potere (ho potuto vederlo = "I managed to see him"), and volere (ho voluto farlo = "I insisted on doing it"). It is a systematic pattern of Italian aspectual semantics.

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

When sapere is followed by an infinitive, it means "to know how to / be able to" — a modal use that English splits between "know how to" and "can":

Mio nonno sa fare il pane in casa.

My grandfather knows how to make bread at home.

Sapevo nuotare prima di sapere camminare.

I knew how to swim before I knew how to walk.

Non so cucinare neanche un uovo.

I can't even cook an egg.

This sapere + infinitive is distinct from potere + infinitive ("to be physically/circumstantially able to"). Non so guidare = "I don't know how to drive" (no licence, no skill). Non posso guidare = "I can't drive" (this car is broken / I've had a drink / etc.).

Sapere vs. conoscere — the critical distinction

This is the single most important lexical contrast for learners of Italian:

Verb	Use for	Examples
sapere	facts, information, abilities; followed by a clause (che...) or an infinitive (sapere fare)	So che è italiano. So nuotare. So la risposta.
conoscere	acquaintance with people, places, things; takes a direct object (a noun)	Conosco Marco. Conosco Roma. Conosco questa canzone.

A useful test: if the object of "to know" is a clause (a that-clause or an indirect question) or an infinitive, use sapere. If the object is a noun (especially a person, place, work of art, language as a thing-with-which-you-are-familiar), use conoscere.

So che Marco vive a Roma, ma non lo conosco di persona.

I know that Marco lives in Rome, but I don't know him personally.

Conosco bene Firenze, ma non so quanto costi un biglietto del bus.

I know Florence well, but I don't know how much a bus ticket costs.

Common mistakes

❌ Conosco che lui è italiano.

Incorrect — to know a fact (a clause), use sapere, not conoscere.

✅ So che lui è italiano.

Correct — sapere + che + clause.

❌ So Marco da molti anni.

Incorrect — to know a person (acquaintance), use conoscere.

✅ Conosco Marco da molti anni.

Correct — conoscere + person.

❌ Voglio che tu sapia la verità.

Incorrect — the congiuntivo of sapere uses the doubled stem sappi-, not 'sapi-'.

✅ Voglio che tu sappia la verità.

Correct — sappia.

❌ Ho saputo Marco alla festa.

Incorrect — to express 'I met Marco' (first acquaintance), use conoscere.

✅ Ho conosciuto Marco alla festa.

Correct — ho conosciuto = I met for the first time.

❌ Sapevo questa notizia ieri.

Misleading — sapevo expresses durative state. To say 'I found out yesterday,' use the passato prossimo.

✅ Ho saputo questa notizia ieri.

Correct — ho saputo = I found out (inceptive).

Key takeaways

Sapere is a high-frequency, irregular verb whose semantics matter as much as its forms. Three points to internalise:

Sapere is for facts, information, and abilities; conoscere is for acquaintance. Master this split first — it's the single biggest source of vocabulary errors for English speakers.
The participio passato saputo carries an inceptive reading in compound tenses: l'ho saputo = "I found out," not "I have known." For "I knew" as a continuous state, use the imperfetto: sapevo.
Watch the irregular stems: io so (one syllable), noi sappiamo with double pp, futuro/condizionale contracted to sapr-, congiuntivo sappia (NOT sapia), passato remoto 1-3-3 seppi/seppe/seppero.

Drill sapere and conoscere side-by-side. They are a matched pair, and you will use them constantly.

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