The Persian “long infinitive,” the dictionary form ending in ـن or ـدن/ـتن, is historically and synchronically close to an action noun. رفتن raftan can mean “to go” when cited as a verb, but inside a sentence it can occupy noun positions and mean “going” or “the act of leaving.” It can follow a preposition, serve as subject or complement, take ezâfe dependents, and occasionally be pluralized when separate instances or manners are intended.
English uses several competing shapes—to leave, leaving, the departure, the fact that she left. Persian often uses one infinitive for the first three, but not indiscriminately. A finite clause is better when tense, person, negation, or the truth of a complete proposition matters. The useful insight is that a Persian infinitive can remain semantically verbal while behaving syntactically like a noun.
The long infinitive as an action noun
| Frame | Persian pattern | Function | Register |
|---|---|---|---|
| subject | پیاده رفتن سخت است | “going on foot” as a proposition-like activity | neutral |
| after a preposition | از دیدن شما | “from seeing you” | neutral, often formulaic |
| with an ezâfe dependent | خواندن کتاب | “reading the book/a book” | neutral to formal |
| with a possessive clitic | آمدنش | “his/her coming” | neutral |
| pluralized | آمدنها و رفتنها | repeated arrivals and departures | marked, literary or contrastive |
| finite alternative | اینکه دیر رسید | “the fact that he/she arrived late” | neutral |
As a subject, the infinitive names an activity without assigning it grammatical gender or article marking. It normally takes singular agreement because the activity is construed as one abstract whole.
هر روز پیاده رفتن برایم سخت است.
har ruz piyâde raftan barâ-yam sakht ast.
Going on foot every day is hard for me. (neutral standard)
زود خوابیدن تمرکزم را بهتر کرده است.
zud khâbidan tamarkoz-am râ behtar karde ast.
Going to bed early has improved my concentration. (neutral standard)
The infinitive itself does not locate the event in time. رفتن names going; the surrounding predicate and context locate it. If the precise time or actor is central, Persian often chooses a finite clause instead.
Participants linked by ezâfe
An action noun can retain participants associated with its verb. A following noun or pronoun is linked by ezâfe: خواندنِ کتاب khândan-e ketâb “reading the book,” دیدنِ شما didan-e shomâ “seeing you,” آمدنِ قطار âmadan-e qatâr “the train’s arrival.” After the consonant-final infinitive, ezâfe is heard as -e but normally not written in unvowelized text.
خواندن این گزارش حدود یک ساعت وقت میبرد.
khândan-e in gozâresh hodud-e yek sâ'at vaqt mi-barad.
Reading this report takes about an hour. (neutral standard)
از دیدن شما خیلی خوشحال شدم.
az didan-e shomâ kheyli khoshhâl shodam.
I was very happy to see you. (polite, careful spoken standard)
رسیدن قطار بهدلیل بارش برف به تأخیر افتاد.
residan-e qatâr be-dalil-e bâresh-e barf be ta'khir oftâd.
The train's arrival was delayed because of snowfall. (formal written standard)
The ezâfe dependent may correspond to the underlying object (خواندن کتاب) or subject (رسیدن قطار). With a transitive infinitive and an animate dependent, the relation can be genuinely ambiguous. دیدن علی can mean “seeing Ali” or, in a suitable context, “Ali’s seeing.” Persian does not mark the two readings by case. Rephrase when context does not resolve them: use a possessive clitic, a prepositional phrase, or a finite clause.
دیدن علی همه را غافلگیر کرد.
didan-e ali hame râ ghâfelgir kard.
Seeing Ali surprised everyone / Ali's seeing [it] surprised everyone. (structurally ambiguous without context)
Possessive clitics identify the actor
A possessive clitic on the infinitive commonly identifies the understood subject: آمدنم “my coming,” رفتنت “your leaving,” برگشتنشان “their return.” These forms are compact and natural in both speech and writing. Because the host is nominal, the clitic has the same shape used with ordinary nouns.
دیر آمدنم را به مدیر توضیح دادم.
dir âmadan-am râ be modir towzih dâdam.
I explained my late arrival to the manager. (neutral standard)
برگشتنشان تا نیمهشب طول کشید.
bargashtan-eshân tâ nime-shab tul keshid.
Their return took until midnight. (neutral standard)
The clitic does not turn the infinitive into a finite verb: آمدنم still has no tense or person agreement of its own. The main verb carries clause-level tense and agreement. Compare Long Infinitives as Verbal Nouns for the verbal side of the pattern.
When a finite clause is better
Use a finite complement with اینکه when the embedded message needs its own tense, negation, modality, or explicit personal perspective. Compare a general activity with a fact about a particular event:
دیر رسیدن آزاردهنده است.
dir residan âzârdahande ast.
Arriving late is annoying. (general activity)
اینکه دیروز دیر رسیدی همه را نگران کرد.
inke diruz dir residi hame râ negarân kard.
The fact that you arrived late yesterday worried everyone. (finite event with an explicit addressee)
Trying to load every finite distinction onto a bare infinitive produces ambiguity. The finite clause openly says who acted and when. Conversely, a finite clause can sound unnecessarily heavy when the speaker merely names an activity: شنا کردن برای کمرم خوب است is more direct than a fact-clause paraphrase.
Plural infinitives: separate events, habits, or manners
Because the infinitive is nominal, productive plural ـها can attach: رفتنها, آمدنها, گفتنها. Yet this is not the ordinary plural of an action noun. It deliberately individuates repeated occasions, characteristic manners, or contrasting phases, and therefore sounds expressive, literary, or analytically contrastive.
آمدنها و رفتنهای بیخبرش همه را خسته کرده بود.
âmadan-hâ va raftan-hâ-ye bi-khabar-ash hame râ khaste karde bud.
His unannounced comings and goings had worn everyone out. (literary/expressive)
In neutral prose, one action kind remains singular even if it happens repeatedly: هر روز ورزش کردن مفید است “Exercising every day is beneficial.” Do not add plural merely because English mentions multiple occasions. The plural forces the occasions or manners into the foreground.
A short register contrast
از منتظر ماندن خسته شدم.
az montazer mândan khaste shodam.
I got tired of waiting. (careful spoken standard)
دیگه از بس منتظر موندم خسته شدم.
dige az bas montazer mundam khaste shodam.
I'm tired because I've waited so long. (informal, regional: Tehran; a finite colloquial clause replaces the nominal style)
The nominalized infinitive is not inherently formal; از منتظر ماندن خسته شدم is perfectly usable in careful speech. Dense chains of nominalizations, however, typify administrative and academic writing. Conversation often chooses a finite clause because it identifies the actor and event more vividly.
Common Mistakes
1. Adding an English-style article
❌ یک رفتن برای سلامتی خوب است.
Incorrect for the generic activity — Persian does not require an article equivalent to English ‘the act of going.’
✅ پیاده رفتن برای سلامتی خوب است.
piyâde raftan barâ-ye salâmati khub ast.
Walking is good for your health.
2. Treating a counted infinitive like an English plural noun
❌ سه رفتنها به اداره کافی بود.
Incorrect — a noun after a cardinal number does not take plural ها, and this event count needs a unit noun.
✅ سه بار رفتن به اداره کافی بود.
se bâr raftan be edâre kâfi bud.
Going to the office three times was enough.
3. Expecting the infinitive itself to mark tense
❌ دیروز رفتن او فردا تمام میشود.
Incorrect for the intended completed event — the infinitive does not itself express past tense, and the time frame conflicts.
✅ اینکه او دیروز رفت همهچیز را تغییر داد.
inke u diruz raft hame-chiz râ taghyir dâd.
The fact that he or she left yesterday changed everything.
4. Assuming an ezâfe dependent has only one participant role
❌ دیدن علی همیشه فقط یعنی علی را دیدن.
Incorrect as a grammatical claim — without context, علی may be the experiencer or the person seen.
✅ اینکه من علی را دیدم همه را غافلگیر کرد.
inke man ali râ didam hame râ ghâfelgir kard.
The fact that I saw Ali surprised everyone. (finite wording removes the ambiguity)
Key Takeaways
- The long infinitive can act as an action noun while retaining participant relations inherited from its verb.
- It can be a subject, follow a preposition, take ezâfe dependents and possessive clitics, and receive را as part of a specific noun phrase.
- An ezâfe dependent may represent an underlying subject or object; use context or a finite paraphrase to disambiguate.
- Plural infinitives are possible but marked: they individuate repeated occasions, manners, or contrasting event types.
- Choose a finite اینکه clause when person, tense, negation, or the truth of a particular event must be explicit.
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Start learning Farsi →Related Topics
- The Infinitive and Past StemA1 — Recognize Persian infinitives, recover the fully predictable past stem, and use both forms correctly when learning and looking up verbs.
- Long Infinitives as Verbal NounsA2 — Use Persian infinitives as noun-like names of actions, with ezâfe complements, prepositional phrases, possessors, and countable event readings.
- Ezâfe with Verbal Nouns and ObjectsB2 — How Persian verbal nouns link to objects and agents, why unpointed phrases become ambiguous, and when finite clauses are clearer.
- Infinitive or اینکه Clause?B1 — Choose a compact Persian long infinitive for a noun-like event and an اینکه clause when subject, tense, polarity, or stance needs finite expression.
- Indefinite ی on NounsA2 — How the unstressed indefinite clitic ـی selects an unspecified member or amount, changes shape after vowels, and scopes over modified noun phrases.
- Participles Used as NounsB2 — How Persian active and past participles become nouns for agents, affected people, results, and established lexical categories.