Past infinitive and gerund

Past infinitive and gerund in Italian

This guide explains two important non-finite verb forms in Italian: the past infinitive (infinito passato) and the gerund (gerundio). You will learn what each form means, how to form it, when to use it, how pronouns and agreement behave, and common mistakes to avoid. Examples are mostly in Italian with short English translations.

What are the past infinitive and the gerund?

Past infinitive (infinito passato)
The past infinitive expresses an action viewed as completed relative to another action. It is the infinitive of a compound tense: "avere/essere + past participle." In English it often corresponds to "to have + past participle" or simply the perfect idea in subordinate clauses: e.g. "to have eaten / to have gone."

Italian examples:
- di aver mangiato (to have eaten) — Credo di aver mangiato troppo. (I think I ate/I've eaten too much.)
- di essere andato/a (to have gone) — Spero di essere arrivato in tempo. (I hope I arrived on time / I hope I have arrived on time.)

Gerund (gerundio)
The gerund has two important forms:
- gerundio presente (present gerund): expresses simultaneous action, manner or forms the progressive with stare. Formed with -ando / -endo (parlando, leggendo).
- gerundio passato (past gerund): expresses an action completed before the main verb (anteriority) or a reason/cause. Formed with avendo/essendo + past participle (avendo parlato, essendo arrivato).

Italian examples:
- Present gerund: Parlava ascoltando la radio. (He was talking while listening to the radio.)
- Use with stare: Sto studiando. (I am studying.)
- Past gerund: Avendo finito i compiti, sono uscito. (Having finished my homework, I went out.)
- Past gerund with essere: Essendo arrivata tardi, ha perso l'inizio del film. (Having arrived late, she missed the start of the movie.)

How do I form them?

Past infinitive (infinito passato)
Formula: avere/essere (infinitive) + past participle
- avere + past participle: aver mangiato / aver parlato / aver visto
- essere + past participle: essere andato/essere arrivato/essere stato

Examples:
- Dopo aver mangiato, siamo usciti. (After having eaten, we went out.)
- Mi dispiace di non essere stato invitato. (I am sorry I wasn’t invited. — speaker male)
- Maria dice di essere andata a Roma. (Maria says she went to Rome.)

Note: In speech and writing you often see the shortened form "aver + past participle" (dopo aver mangiato), which is normal.

Gerund (gerundio)
- Present gerund: stem + -ando / -endo
- parlare → parlando; leggere → leggendo; dormire → dormendo
- Use with stare for progressive: sto parlando.
- Past gerund: avendo/essendo + past participle
- avere → avendo + mangiato = avendo mangiato
- essere → essendo + arrivato/a/i/e = essendo arrivato

Examples:
- Parlava sorridendo. (He/she answered smiling.) — manner.
- Sto leggendo un libro. (I am reading a book.) — progressive.
- Avendo studiato molto, ha superato l’esame. (Having studied a lot, he/she passed the exam.)

When do I use the past infinitive?

The past infinitive is used when you need an infinitive that shows a completed action (before some reference point). Common uses:

- After verbs and expressions that take an infinitive complement to report a completed action:
- Credo di averla vista ieri. (I think I saw her yesterday / I think I have seen her.)
- Temo di non essere stato chiaro. (I fear I was not clear.)

- After prepositions like dopo, senza, per when you want the idea "after having/without having/for having":
- Dopo aver finito i compiti, siamo usciti. (After finishing the homework, we went out.)
- È stato multato per aver parcheggiato in divieto. (He was fined for having parked illegally.)
- Senza averlo saputo, ho fatto una brutta figura. (Without having known it, I made a bad impression.)

- With modal verbs or expressions of possibility in compound forms:
- Potrei aver sbagliato. (I might have made a mistake.)
- Devo aver lasciato le chiavi in ufficio. (I must have left the keys at the office.)

- With impersonal expressions and attitudes:
- Mi dispiace di non essere venuto. (I’m sorry I didn’t come.)
- È bello essere stati invitati. (It’s nice to have been invited.)

Important notes:
- Use "essere" as auxiliary for verbs that normally take essere in compound tenses (movement, reflexive, change of state): andare, arrivare, nascere, diventare, and reflexives (svegliarsi → essersi svegliato/a).
- Luca dice di essere andato a Milano. (Luca says he went to Milan.)
- Maria spera di essere tornata presto. (Maria hopes she has returned soon.)
- Use "avere" for most transitive verbs: vedere, mangiare, leggere.
- Penso di aver capito. (I think I understood / I think I have understood.)

When do I use the gerund? (present vs past)

Present gerund — main uses
- Progressive: with stare to form continuous aspect
- Sto studiando. (I am studying.)
- Stavamo parlando quando ha suonato il telefono. (We were talking when the phone rang.)

- Simultaneous actions: action happening at the same time as the main verb
- Parlando con lui, ho capito il problema. (While talking to him, I understood the problem.)

- Manner (how something is done)
- Ha risposto sorridendo. (He/she answered, smiling.)

Past gerund — main uses
- Anteriority / "having + past participle": an action completed before the main verb
- Avendo finito il lavoro, sono uscito. (Having finished the work, I went out.)

- Reason/cause (often formal or written style)
- Essendo malato, non ha partecipato alla festa. (Being ill, he/she did not attend the party.)

Key distinction: present gerund = simultaneous or ongoing; past gerund = already completed before the reference action.

Subject and "dangling" gerund — a common pitfall

The subject of the gerund must be the same as the subject of the main clause. If they are different, the sentence is incorrect or ambiguous (a "dangling" gerund).

Wrong: Avendo finito i compiti, la televisione è rimasta accesa.
(Incorrect: this implies the television finished the homework.)

Right: Avendo finito i compiti, ho spento la televisione. (Having finished the homework, I turned off the TV.)
Or: Dopo che ho finito i compiti, la televisione è rimasta accesa. (After I finished the homework, the television stayed on.)

Pronouns, agreement, and small details

Pronoun placement with past infinitive and gerund
- In compound infinitives and gerunds, object and reflexive pronouns attach to the auxiliary form:
- Credo di averlo visto. (I think I saw him.) — pronoun attached to "aver-": averlo.
- Mi dispiace di essermi sbagliato. (I’m sorry I was wrong.) — reflexive pronoun attaches to "essere": essermi.
- Spero di averti aiutato. (I hope I helped you.)
- Avendolo visto, non ho parlato. (Having seen him, I didn’t speak.) — formal/written register.

Agreement of the past participle
- With auxiliary essere (in past infinitive / past gerund) the past participle must agree in gender and number with the subject.
- Essendo arrivato tardi, ha perso il treno. (male speaker)
- Essendo arrivata tardi, ha perso il treno. (female speaker)
- Luca e Anna dicono di essere andati a teatro. (they went → andati for masculine or mixed group)

- With auxiliary avere the participle does not agree with the subject, but it does agree with a preceding direct-object clitic pronoun.
- Credo di averla vista ieri. (I think I saw her yesterday.) — "vista" agrees with "la".
- Dicono di averci invitati. (They say they invited us.) — "invitati" agrees with "ci" (if you explicitly want agreement: common in speech/writing when clitic precedes).

Short note about "aver" vs "avere"
In many contexts Italian shortens "avere" to "aver" before a past participle (specially in written or formal styles):
- Dopo aver mangiato = Dopo avere mangiato (both understood; "dopo aver" is common and idiomatic).

Common mistakes and how to avoid them

- Wrong: "Dopo mangiare, siamo usciti." → Correct: "Dopo aver mangiato, siamo usciti." (Use past infinitive after "dopo" when the action is completed.)
- Wrong (dangling gerund): "Avendo finito il progetto, la festa è cominciata." → Correct: "Avendo finito il progetto, abbiamo cominciato la festa." or "Dopo che abbiamo finito il progetto, la festa è cominciata." (Make the subject the same.)
- Wrong auxiliary: "Penso di essere visto il film." → Correct: "Penso di aver visto il film." (Vedere uses avere.)
- Agreement error with essere: "Mi dispiace di non essere stato invitata" (male speaker using female participle) → choose the participle to agree with the speaker: "invitato" (male) or "invitata" (female).
- Pronoun placed incorrectly: "Credo aver visto lui." → Correct: "Credo di averlo visto." (Attach clitic to "aver" or place pronoun before conjugated verb in other constructions.)

Quick reference: forms and translations

- Past infinitive: avere/essere + past participle
- Credo di aver finito. (I think I have finished.)
- Spero di essere tornata presto. (I hope I have returned soon. — feminine speaker)

- Present gerund: -ando / -endo
- Sto parlando. (I am speaking.)
- Entrò sorridendo. (He/She entered, smiling.)

- Past gerund: avendo/essendo + past participle
- Avendo studiato, ha superato l’esame. (Having studied, he/she passed the exam.)
- Essendo nato in Italia, parla fluentemente. (Being born in Italy, he/she speaks fluently.)

Glossary (simple definitions)

- Infinitive: the basic form of the verb (parlare, mangiare, andare).
- Past participle (participio passato): the -ato / -uto / -ito form used in compound tenses (parlato, mangiato, andato).
- Auxiliary verb: avere or essere used to form compound tenses.
- Gerund (gerundio): verb form ending in -ando / -endo (present) or formed with avendo/essendo + participle (past).
- Infinito passato: the compound infinitive (avere/essere + participle) meaning "to have ..." or "to have been ..." in functional equivalents.

Final tips for learners

- Compare with English: Italian past infinitive ≈ English "to have + past participle" or the idea of "having done." Past gerund ≈ English "having + past participle." Present gerund ≈ English "-ing" for simultaneous actions and the progressive with "to be + -ing."
- Pay attention to the auxiliary (essere vs avere) and to agreement with essere.
- Check the subject when you use a gerund: avoid dangling gerunds by making sure the subject of the gerund and the main clause match.
- Practice with short sentences: make simple sentences with dopo/avendo/essendo/stare and add pronouns to see how placement changes.

If you want, I can provide a concise list of verbs that commonly take "essere" in compound tenses (movement and reflexives) and a list of verbs that commonly take "avere."