Impersonal Modal Constructions | Farsi Grammar

Persian can express what is possible, permitted, necessary, or advisable without naming an ordinary subject. اینجا می‌شود پارک کرد means “one can park here,” and باید احتیاط کرد means “one must be careful.” The modal element is fixed, while the following verb either appears as a short infinitive or identifies a specific agent through subjunctive person marking.

English often uses dummy it or generic you: “it is possible to pay online,” “you have to wait.” Persian normally inserts neither آن “it” nor شما “you” in these generic statements. The absence of an overt subject is part of the construction, not missing information.

The four core patterns

Modal frame	Core meaning	Typical complement	Register
می‌شود	possibility, permission, proposal	short infinitive or subjunctive	neutral; extremely common in speech
می‌توان	general possibility or capability	short infinitive	careful standard; especially (formal) and (academic)
باید	necessity, obligation, strong expectation	short infinitive or subjunctive	neutral
لازم است	necessity stated as an evaluation	subjunctive clause	neutral-formal

اینجا می‌شود با کارت پرداخت کرد.

injâ mi-shavad bâ kârt pardâkht kard.

You can pay by card here. (neutral standard; generic possibility)

با این روش می‌توان مصرف آب را کاهش داد.

bâ in ravesh mi-tavân masraf-e âb râ kâhesh dâd.

With this method, water consumption can be reduced. (formal/academic; generic possibility)

در جاده‌ی خیس باید آهسته‌تر رانندگی کرد.

dar jâdde-ye khis bâyad âheste-tar rânandegi kard.

On a wet road, one must drive more slowly. (neutral general advice)

لازم است همه‌ی فرم‌ها را امروز تحویل بدهیم.

lâzem ast hame-ye form-hâ râ emruz tahvil be-dahim.

We need to submit all the forms today. (neutral-formal; specific first-person plural agent)

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The complement tells you whether the agent is generic or specific. A short infinitive such as کرد leaves the actor open; a subjunctive such as کنیم identifies “we” through its ending.

می‌شود with a short infinitive

می‌شود + short infinitive presents an action as generally feasible or available. The “short infinitive” is identical in form to the third-person singular simple past—رفت، دید، نوشت، پرداخت کرد—but it is not a past event here. It does not change for person.

از این ایستگاه می‌شود مستقیم به فرودگاه رفت.

az in istgâh mi-shavad mostaqim be forudgâh raft.

From this station, you can go directly to the airport. (neutral standard; no specific traveler)

این فایل را نمی‌شود با گوشی باز کرد.

in fâyl râ na-mi-shavad bâ gushi bâz kard.

This file cannot be opened on a phone. (neutral standard; negative possibility)

The object keeps its own marking: definite این فایل takes را, even though no agent is expressed. می‌شود is fixed in the third-person singular; it does not agree with فایل or with an imagined plural “people.”

می‌شود with a subjunctive

With a person-marked subjunctive, می‌شود often asks permission, proposes an action, or considers a particular possible event. The person ending belongs to the complement.

می‌شود من هم پنجره را باز کنم؟

mi-shavad man ham panjare râ bâz konam?

May I open the window too? (polite neutral request)

می‌شود فردا کمی زودتر شروع کنیم؟

mi-shavad fardâ kami zudtar shoru' konim?

Could we start a little earlier tomorrow? (neutral proposal)

The optional من in the first example adds contrast or clarity; ـم on کنم already identifies the intended actor. This is ordinary Persian subject omission operating inside an impersonal modal frame.

In Tehran conversation (informal, regional: Tehran), می‌شود is pronounced and commonly written in represented speech as میشه:

میشه این صندلی رو ببریم بیرون؟

mishe in sandali ro be-barim birun?

Can we take this chair outside? (informal, regional: Tehran)

Use می‌شود in edited prose; میشه represents speech or casual messaging.

می‌توان in careful standard and formal prose

Impersonal می‌توان is especially common when a writer states a general method, inference, or possibility. Like می‌شود, it remains singular and is followed by the short infinitive.

از این داده‌ها می‌توان نتیجه‌ی دقیق‌تری گرفت.

az in dâde-hâ mi-tavân natije-ye daqiq-tari gereft.

A more precise conclusion can be drawn from these data. (academic)

بدون مدرک کافی نمی‌توان چنین ادعایی کرد.

bedun-e madrak-e kâfi na-mi-tavân chonin edde'â-yi kard.

Without sufficient evidence, one cannot make such a claim. (formal/academic)

In everyday conversation, speakers usually prefer می‌شود or a personal form of توانستن: می‌تونی این کار رو بکنی؟ “Can you do this?” Impersonal می‌توان is possible in careful speech, but in casual conversation it sounds deliberately formal.

باید: generic obligation versus a specific agent

باید + short infinitive expresses a general rule or recommendation. باید + subjunctive points to a particular person's required action.

در این آزمایشگاه باید عینک ایمنی زد.

dar in âzmâyeshgâh bâyad eynak-e imeni zad.

In this laboratory, one must wear safety glasses. (neutral-formal; generic rule)

باید تا ساعت شش برگردم.

bâyad tâ sâ'at-e shesh bar-gardam.

I have to be back by six. (neutral; specific first-person agent)

The second clause has no overt من, but it is not semantically impersonal: ـم identifies the agent. Persian pro-drop and impersonal modal grammar overlap on the surface, so always inspect the ending.

The negative نباید normally means “must not / should not,” not merely “do not have to.”

نباید این دارو را با معده‌ی خالی بخورید.

na-bâyad in dâru râ bâ me'de-ye khâli be-khorid.

You must not take this medicine on an empty stomach. (polite neutral warning)

لازم است and the absence of necessity

لازم است evaluates a following event as necessary. Its complement normally uses the subjunctive, whose ending identifies the agent. The modal phrase itself remains لازم است.

لازم است قبل از امضا متن را دوباره بخوانی.

lâzem ast qabl az emzâ matn râ do-bâre be-khâni.

You need to reread the text before signing. (neutral-formal; specific singular agent)

لازم نیست برای این کار اجازه بگیریم.

lâzem nist barâ-ye in kâr ejâze be-girim.

We do not need to get permission for this. (neutral; absence of necessity)

Compare نباید برویم “we must not go” with لازم نیست برویم “we do not need to go.” This is the same crucial difference as English must not versus do not have to.

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For prohibition choose نباید; for “it is not necessary” choose لازم نیست. They are not interchangeable negatives.

Impersonal is not the same as passive

In این فرم را باید پر کرد, این فرم را is still a direct object and the agent is generic. In a passive, the patient behaves as the clause's subject and does not take را.

این فرم را باید تا فردا پر کرد.

in form râ bâyad tâ fardâ por kard.

This form must be completed by tomorrow. (neutral; impersonal active with a direct object)

این فرم باید تا فردا پر شود.

in form bâyad tâ fardâ por shavad.

This form must be completed by tomorrow. (formal-neutral; passive complement)

The translations coincide, but the Persian structures do not. This page gives the clause-level map; Impersonal می‌شود and Generic Impersonal Predicates develop the verbal details.

A short exchange

— می‌شود امروز مدارک را تحویل داد؟ — بله، ولی باید قبل از ساعت چهار برسید. — لازم است اصل گذرنامه را هم بیاورم؟ — نه، لازم نیست.

— mi-shavad emruz madârek râ tahvil dâd? — bale, vali bâyad qabl az sâ'at-e chahâr be-resid. — lâzem ast asl-e gozarnâme râ ham biyâvaram? — na, lâzem nist.

— Can the documents be submitted today? — Yes, but you must arrive before four. — Do I need to bring the original passport too? — No, it isn't necessary. (polite neutral exchange)

Common Mistakes

❌ اینجا می‌شود پارک کردن.

Incorrect — generic می‌شود selects the short infinitive پارک کرد, not the dictionary infinitive پارک کردن.

✅ پشت ساختمان می‌شود پارک کرد.

posht-e sâkhtemân mi-shavad pârk kard.

You can park behind the building.

❌ اینجا می‌شوند بلیت خرید.

Incorrect — impersonal می‌شود remains third-person singular.

✅ از دستگاه کنار در می‌شود بلیت خرید.

az dastgâh-e kenâr-e dar mi-shavad belit kharid.

Tickets can be bought from the machine by the door.

3. Using an indicative after a permission frame

❌ می‌شود فردا می‌آیم؟

Incorrect for asking permission — the proposed action takes the subjunctive بیایم.

✅ می‌شود فردا صبح بیایم؟

mi-shavad fardâ sobh biyâyam?

May I come tomorrow morning?

4. Treating referential آن as a dummy pronoun

Persian آن can be the real subject “that,” but it is not inserted as a meaningless counterpart of English dummy it. Leave it out when no discourse referent is intended.

✅ آن لازم است، ولی کافی نیست.

ân lâzem ast, vali kâfi nist.

That is necessary, but not sufficient. (آن is referential, not a dummy)

✅ لازم است کمی زودتر راه بیفتیم.

lâzem ast kami zudtar râh biyoftim.

It is necessary for us to set off a little earlier.

5. Confusing prohibition with lack of necessity

✅ نباید بیایی؛ جلسه لغو شده است.

na-bâyad biyâyi; jalse laghv shode ast.

You must not come; the meeting has been canceled. (prohibition)

✅ لازم نیست بیایی؛ جلسه اختیاری است.

lâzem nist biyâyi; jalse ekhtiyâri ast.

You do not have to come; the meeting is optional.

Key Takeaways

می‌شود is the everyday neutral modal for generic possibility and, with a subjunctive, permission or proposals.
می‌توان + short infinitive belongs to careful standard Persian and is especially common in formal or academic statements of general possibility.
باید + short infinitive is generic; باید + subjunctive identifies a specific required actor through the ending.
لازم نیست removes necessity, while نباید expresses prohibition or strong negative advice.
A missing overt subject does not always mean a generic agent: person marking on the complement may still identify someone precisely.

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