Using an Infinitive as a Finite Verb | Farsi Grammar

A Persian infinitive such as رفتن “to go/going” is the dictionary form and can behave like a verbal noun. It does not by itself assert that somebody goes or went. An ordinary clause needs a finite verb whose stem, tense or mood marking, and personal ending locate the event and identify its subject: می‌روم “I go/am going,” رفت “he/she went,” رفتیم “we went.”

English encourages the error because its bare-looking verb appears after most subjects: “I go,” “we go,” “they go.” Persian does not place the citation form after a pronoun in the same way. The practical repair is to identify the intended time and subject, choose the correct stem, and finish the finite word.

Recognize the Citation Form

The Persian long infinitive normally ends in ن and serves as the form listed in dictionaries: رفتن، دیدن، نوشتن، خوردن، کار کردن. Removing final ن gives the past stem: رفت، دید، نوشت، خورد، کار کرد. The present stem must generally be learned separately: رو، بین، نویس، خور، کن.

Dictionary form	Past stem	Present stem	Finite first singular
رفتن	رفت	رو	رفتم، می‌روم
دیدن	دید	بین	دیدم، می‌بینم
نوشتن	نوشت	نویس	نوشتم، می‌نویسم
کار کردن	کار کرد	کار کن	کار کردم، کار می‌کنم

امروز تا ساعت شش در کتابخانه کار می‌کنم.

emruz tâ sâ'at-e shesh dar ketâbkhâne kâr mi-konam.

I’m working in the library until six today. (neutral standard; finite present)

دیروز تا ساعت شش در کتابخانه کار کردم.

diruz tâ sâ'at-e shesh dar ketâbkhâne kâr kardam.

I worked in the library until six yesterday. (neutral standard; finite past)

The nonverbal element کار stays stable; the light verb supplies tense and person. A bare کار کردن would name the activity, not assert either sentence.

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When a dictionary gives نوشتن, do not attach present endings to that whole word. Store the pair نوشتن — نویس: the infinitive supplies past stem نوشت, while نویس builds the present system.

A Finite Verb Answers Time and Person

To repair an infinitive in clause-final position, ask two questions. First, is the event present/habitual, past, or in another mood? Second, who performs it? For an ordinary present indicative, combine می‌, the present stem, and the personal ending. For a simple past, combine the past stem and ending; third-person singular has a zero ending.

روزهای کاری ساعت هفت و ربع از خانه به سمت ایستگاه بیرون می‌روم.

ruz-hâ-ye kâri sâ'at-e haft-o-rob' az khâne be samt-e istgâh birun mi-ravam.

On workdays I leave home for the station at seven fifteen. (neutral standard; first-singular present)

مینا دیشب پس از پایان فیلم به خانه رفت.

Minâ dishab pas az pâyân-e film be khâne raft.

Mina went home after the film ended last night. (neutral standard; third-singular simple past)

دوستانم هفته‌ی آینده به تهران می‌آیند.

dustân-am hafte-ye âyande be Tehrân mi-âyand.

My friends are coming to Tehran next week. (neutral standard; third-plural futurate present)

The ending often licenses omission of an independent subject. می‌آیند already marks “they”; adding آن‌ها is a discourse choice, not a requirement copied from English.

Keep Infinitives Where They Are Genuine Nouns

Infinitives are not defective forms. They are correct when the action itself is named, discussed, or embedded after constructions that license a verbal noun.

خواندن گزارش‌های طولانی روی تلفن خسته‌کننده است.

khândan-e gozâresh-hâ-ye tulâni ru-ye telefon khaste-konande ast.

Reading long reports on a phone is tiring. (neutral standard; infinitive as subject)

برای دیدن پزشک باید از قبل وقت بگیرید.

barâ-ye didan-e pezeshk bâyad az qabl vaqt begirid.

To see the doctor, you must make an appointment in advance. (formal-neutral; infinitive after برای)

These examples do not identify a subject through خواندن or دیدن. The clause-level predicates خسته‌کننده است and باید ... بگیرید carry the finite grammar. See Long Infinitives as Verbal Nouns for their nominal behavior.

English Infinitives Do Not Predict Persian Complements

English uses “to + verb” after want, but Persian lexical خواستن takes a finite subjunctive: می‌خواهم بروم, not می‌خواهم رفتن. Other Persian expressions may license infinitives after a preposition or use a finite که clause. Select the Persian complement pattern rather than copying the English surface word to.

می‌خواهیم پیش از تاریکی به اردوگاه برگردیم.

mi-khâhim pish az târiki be ordugâh bar-gardim.

We want to return to the camp before dark. (neutral standard; finite subjunctive complement)

پس از دیدن پیام، فوری با او تماس گرفتم.

pas az didan-e payâm, fowri bâ u tamâs gereftam.

After seeing the message, I called him or her immediately. (neutral standard; infinitive after preposition)

Common Mistakes

1. Using the Dictionary Form as a Simple-Past Verb

❌ من دیروز برای تمدید گذرنامه به اداره رفتن.

Incorrect — رفتن is the infinitive; first-singular simple past requires رفتم.

✅ من دیروز برای تمدید گذرنامه به اداره رفتم.

man diruz barâ-ye tamdid-e gozarnâme be edâre raftam.

I went to the office yesterday to renew my passport.

2. Copying an English Bare Verb into a Present Clause

❌ ما هر جمعه در پارک دویدن.

Incorrect — the clause needs first-plural finite می‌دویم, not infinitive دویدن.

✅ ما هر جمعه صبح در پارک می‌دویم.

mâ har jom'e sobh dar pârk mi-davim.

We run in the park every Friday morning.

3. Building the Present on the Whole Infinitive

❌ من جواب را می‌نوشتنم.

Incorrect — present ‘I write’ uses present stem نویس, not infinitive نوشتن plus an ending.

✅ من پاسخ مشتری را همان روز می‌نویسم.

man pâsokh-e moshtari râ hamân ruz mi-nevisam.

I write the customer’s reply that same day.

4. Mistaking a Real Past-Imperfective Form for the Present

می‌رفتم is grammatical, but it means “I was going/used to go,” not “I go.” Its stem رفت places it in the past system.

✅ آن سال هر روز پیاده به دانشگاه می‌رفتم.

ân sâl har ruz piyâde be dâneshgâh mi-raftam.

That year I used to walk to university every day. (grammatical past imperfective)

✅ امسال هر روز با مترو به دانشگاه می‌روم.

emsâl har ruz bâ metro be dâneshgâh mi-ravam.

This year I take the metro to university every day. (intended present)

5. Using an Infinitive after Lexical می‌خواهم

❌ می‌خواهم امشب زودتر خوابیدن.

Incorrect — lexical می‌خواهم selects a finite present-subjunctive complement.

✅ می‌خواهم امشب پیش از ساعت یازده بخوابم.

mi-khâham emshab pish az sâ'at-e yâzdah bekhâbam.

I want to go to sleep before eleven tonight.

6. Leaving the Light Verb Infinitive in a Compound Predicate

❌ خواهرم هر عصر در باشگاه ورزش کردن.

Incorrect — compound ورزش کردن becomes finite on the light verb: ورزش می‌کند.

✅ خواهرم هر عصر پس از کار در باشگاه ورزش می‌کند.

khâhar-am har asr pas az kâr dar bâshgâh varzesh mi-konad.

My sister works out at the gym every evening after work.

7. Separating the Present Prefix with an Ordinary Space

❌ من معمولا ساعت هفت از خانه بیرون می روم.

Incorrect standard orthography — می‌ attaches to روم with ZWNJ.

✅ من معمولا ساعت هفت و نیم از خانه بیرون می‌روم.

man ma'mulan sâ'at-e haft-o-nim az khâne birun mi-ravam.

I usually leave home at seven thirty.

8. Treating Every Infinitive-Looking Clause as an Error

The first sentence is grammatical because رفتن names an activity. It does not assert that the speaker is leaving.

✅ رفتن بدون خداحافظی کار خوبی نیست.

raftan bedun-e khodâhâfezi kâr-e khubi nist.

Leaving without saying goodbye is not a good thing. (grammatical nominal infinitive)

✅ من بدون خداحافظی از مهمانی نمی‌روم.

man bedun-e khodâhâfezi az mehmâni nemi-ravam.

I do not leave a party without saying goodbye. (finite first-singular clause)

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Clause-final position does not automatically make a form finite. Check whether the verb identifies a subject and time; if it merely names the activity, the infinitive may be exactly right.

Key Takeaways

The infinitive is a citation form and verbal noun, not an ordinary finite predicate.
Remove final ن to obtain the past stem; learn the present stem separately.
A finite verb combines the required stem with tense or mood marking and person agreement.
English bare verbs and English “to” complements do not determine Persian form choice.
In compound predicates, the light verb—not the nonverbal element—carries finite morphology.

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