Personal infinitives occupy a specific middle ground in Hungarian. They are not finite clauses—the forms have no tense and no nominative subject—but they are not participant-free either. Possessive-like endings identify who performs the action, while an overt logical subject is normally dative. The main challenge is knowing which predicates license this architecture.
Review the paradigm on personal-infinitive forms and its central functions on personal-infinitive usage. This page focuses on boundary choices and information structure.
Generic infinitive versus personal infinitive
A bare infinitive leaves the relevant participant generic; a personal infinitive assigns the action to a person or group.
A könyvtárban csendben kell beszélni.
One must speak quietly in the library.
A könyvtárban csendben kell beszélnünk.
We have to speak quietly in the library.
The first is a general norm. The second says that we bear the obligation. Hungarian does not need an overt mi because -nünk identifies the participant.
Regional and informal varieties also allow an overt dative with a bare infinitive, as in Nekem el kell menni. This is a genuine Hungarian variant, not random omission. For a broadly accepted careful-standard model, especially in edited prose, use matching personal morphology: Nekem el kell mennem. Other regional patterns, including el kell menjek and el kellek menni, likewise belong to particular varieties rather than the general standard taught here.
Permission shows the same opposition:
Itt lehet fényképezni.
Photography is allowed here.
Itt lehet fényképeznem?
Am I allowed to take photographs here?
The question is not made personal by intonation alone: -nem explicitly links the permitted action to the speaker.
Impersonal necessity versus ordinary control
With impersonal kell, the performer is dative if overt and is indexed on the infinitive:
Péternek el kell mennie.
Péter has to leave.
With finite akar, Péter is an ordinary nominative subject and controls a bare infinitive:
Péter el akar menni.
Péter wants to leave.
The meanings “must” and “want” differ, but the deeper structural contrast is equally important. Kell does not conjugate for Péter; akar does. Therefore Péter el kell menni mixes two constructions, and Péternek el akar mennie incorrectly transfers personal-infinitive architecture to a finite control verb.
Past time confirms where finiteness resides:
Péternek tegnap el kellett mennie.
Péter had to leave yesterday.
Péter tegnap el akart menni.
Péter wanted to leave yesterday.
Past kellett remains impersonal, while akart has Péter as its finite subject. Mennie/menni themselves do not mark past time.
Personal infinitive versus a finite hogy clause
Evaluative predicates often allow both a personal infinitive and a finite subordinate clause.
Fontos időben megérkezned.
It's important for you to arrive on time.
Fontos, hogy időben megérkezz.
It's important that you arrive on time.
The personal infinitive is compact and packages the arrival as an evaluated action. The hogy clause has a fully finite imperative-subjunctive megérkezz and can feel more explicitly directive. Both are normal; context and style determine the choice.
A finite clause is necessary when tense, mood, or a richer independent proposition must be expressed:
Fontos, hogy tegnap időben megérkeztél.
It's important that you arrived on time yesterday.
A personal infinitive cannot itself say “you arrived yesterday.” It receives temporal interpretation from its environment, but it has no past paradigm.
Different-subject desire verbs also favor a finite clause:
Azt szeretném, hogy te vezesd a megbeszélést.
I'd like you to lead the meeting.
Not szeretném neked vezetned in this meaning. The existence of personal infinitives does not make every English for someone to do compressible.
Personal infinitive versus finite potential or permission
Hungarian can ask permission through an impersonal predicate plus personal infinitive or through the finite potential suffix -hat/-het.
Szabad bejönnöm?
May I come in?
Bejöhetek?
May I come in?
Both are polite and ordinary. Szabad bejönnöm? frames permission as a rule applying to the speaker; Bejöhetek? directly asks whether the speaker can/may enter. Adding kérem or respectful address can adjust register without changing that structural contrast.
Necessity also has lexical alternatives:
Ma be kell fejezned a jelentést.
You have to finish the report today.
Ma be kellene fejezned a jelentést.
You should finish the report today.
Conditional kellene softens the necessity into advice or a less categorical requirement. The personal infinitive befejezned remains second-person singular in both.
Overt dative: topic versus focus
The dative phrase can simply name the participant or can bear narrow contrast. Prefix placement helps reveal the difference.
Évának ma vissza kell vinnie a könyveket.
Éva has to take the books back today.
Évának kell ma visszavinnie a könyveket, nem nekem.
Éva is the one who has to take the books back today, not me.
In the first, Évának is a topic and vissza- climbs before kell. In the second, focused Évának stands immediately before kell, and vissza- stays attached to vinnie. Dative case and third-person -nie remain constant.
If the dative is omitted, the ending still identifies the participant:
Ma vissza kell vinnie a könyveket.
They have to take the books back today.
Without context, Hungarian third-person singular does not mark gender. English may require he or she, while Hungarian vinnie does not choose between them.
Subject marking versus object agreement
The possessive-like ending marks only the infinitive's performer. It does not select an indefinite or definite series for the object.
El kell olvasnom egy új tanulmányt.
I have to read a new study.
El kell olvasnom azt az új tanulmányt.
I have to read that new study.
Both contain olvasnom, although egy új tanulmányt is indefinite and azt az új tanulmányt is definite. This contrasts with finite olvasok/olvasom. A learner who changes the personal-infinitive ending according to the object is importing the finite conjugation into the wrong paradigm.
The infinitive still governs the object's case. Similarly, válaszolnom kell a levélre uses sublative -ra/-re because válaszol governs that case; personal morphology does not change valency.
Possessive-like does not mean “noun”
Compare a possessed noun and a personal infinitive:
Péternek a könyve az asztalon van.
Péter's book is on the table.
Péternek el kell olvasnia a könyvet.
Péter has to read the book.
Könyve and olvasnia both relate a third-person participant to the marked word, but olvasnia retains verbal properties: it takes accusative a könyvet, combines with prefix el-, and is modified by adverbs. “Possessive-like” describes the morphology and dative relation, not the word class.
Irregular stem versus wrong person ending
Irregular infinitives keep their special stems throughout the personal paradigm:
Korán kell jönnöd, mert sok dolgunk lesz.
You have to come early because we'll have a lot to do.
El kell vinnünk a csomagot a postára.
We have to take the package to the post office.
Nehéz elhinnem, hogy már eltelt egy év.
It's hard for me to believe that a year has already passed.
The correct bases are jönn-, vinn-, hinn-. Forms such as jönnied or visznünk mix person endings or dictionary stems incorrectly.
Formal and informal packaging
Conversation often omits a recoverable dative pronoun (informal):
Mennem kell, majd este hívlak.
I have to go; I'll call you this evening.
Regulations make the responsible group explicit (formal):
A résztvevőknek érkezéskor igazolniuk kell a személyazonosságukat.
Participants must prove their identity upon arrival.
Formal style does not cause the personal infinitive; explicit allocation of responsibility makes it useful. Conversation uses the same paradigm whenever the participant matters.
Decision tree
- Is the governor an ordinary finite control verb such as akar or tud, whose own subject performs the action? Use a bare infinitive: Péter úszni akar.
- Is the predicate impersonal—kell, lehet, szabad, muszáj, fontos, érdemes, ideje—and is the participant generic? Use a bare infinitive: Korán kell érkezni.
- Is a specific participant assigned that necessity, permission, or evaluation? Use the matching personal infinitive: Korán kell érkezned.
- If the logical subject is overt, put it in the dative and match person/number: A vendégeknek érkezniük kell.
- Does the complement need independent tense/mood or follow a nonlicensing predicate? Use a finite hogy clause.
- Finally, check prefix climbing, lexical stem, and the infinitive's own case frame.
Short diagnostic
- “Everyone must register.” Choose Mindenkinek regisztrálnia kell when mindenkinek explicitly distributes the obligation. Generic Regisztrálni kell omits the participant.
- “Tamás wants to register.” Choose Tamás regisztrálni akar: nominative controller plus bare infinitive.
- “It matters that Tamás registered yesterday.” Choose finite Fontos, hogy Tamás tegnap regisztrált, because the embedded event needs past tense.
- “We have to submit the form.” Choose Be kell nyújtanunk az űrlapot: first-person plural personal infinitive and neutral prefix climbing.
Common Mistakes
❌ Neked korán kell érkezniük.
Incorrect — the dative subject is singular 'you,' but the infinitive is third-person plural.
✅ Neked korán kell érkezned.
You have to arrive early.
❌ Tamásnak úsznia akar.
Incorrect — finite akar takes a nominative controller and bare infinitive.
✅ Tamás úszni akar.
Tamás wants to swim.
❌ El kell olvasom a jelentést.
Incorrect — first-person finite object agreement cannot replace the personal-infinitive ending.
✅ El kell olvasnom a jelentést.
I have to read the report.
❌ Péternek el kellett mennie holnap.
Incorrect time pairing in the intended future statement — kellett is past.
✅ Péternek holnap el kell mennie.
Péter has to leave tomorrow.
Key Takeaways
- In the broadly accepted careful-standard pattern, bare and personal infinitives contrast generic versus identified performers in licensing environments; regional varieties also allow an overt dative with a bare infinitive.
- Impersonal predicates take dative logical subjects plus possessive-like infinitive agreement; ordinary control verbs take nominative subjects and bare infinitives.
- A finite hogy clause is needed for independent tense/mood and after predicates that do not license personal infinitives.
- The dative can be a neutral topic or contrastive focus; prefix position helps reveal its discourse role.
- Personal endings mark the performer, not tense, gender, or object definiteness.
- Personal infinitives remain verbs despite their possessive-like morphology and retain objects, case government, adverbs, and prefixes.
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Start learning Hungarian →Related Topics
- Personal Infinitives: Forms and Core PatternB1 — Form Hungarian personal infinitives with possessive-like endings, harmonic variants, dative logical subjects, and irregular infinitive stems.
- Personal Infinitives: Meanings and UsageB1 — Use Hungarian personal infinitives to identify who must, may, should, or is expected to perform a nonfinite action.
- The Infinitive in -ni: Contrasts and Learner TrapsA2 — Choose among bare and personal infinitives, finite clauses, participles, and action nouns while preserving Hungarian control and prefix order.
- Infinitive Chains and Verbal Prefix Placement: Contrasts and Learner TrapsB2 — Distinguish neutral prefix climbing from negation, focus, embedded-action contrast, lexical non-climbing verbs, and long infinitive chains.
- kell, lehet, szabad, tud, akar, and szeretne: Contrasts and Learner TrapsB1 — Separate Hungarian necessity, permission, possibility, ability, intention, and polite desire with diagnostics for difficult contexts.
- Complement and Adverbial Clauses: Contrasts and Learner TrapsB2 — Distinguish Hungarian complement clauses from subject, purpose, result, time, cause, condition, and concession clauses.