Grammar Cases / Dopełniacz

DOPEŁNIACZ – The Genitive Case

Core Rule

The Genitive case (Dopełniacz) expresses possession, absence, and quantity. It answers the questions Kogo? Czego? (Whose? Of what?). It is used after negation, after numbers 5 and above, and after many common prepositions: do (to), z (from/with), od (from), bez (without), dla (for), u (at), koło (near), obok (next to), podczas (during), and według (according to).

Important: After negation, the direct object always shifts to genitive: Mam książkę. (I have a book.) → Nie mam książki. (I don't have a book.) This is one of the most frequently used rules in everyday Polish and is essential to master early.

Key Usages

Possession

Expressing that something belongs to someone or something.

dom mojej mamy

After Negation

Direct object shifts to genitive after any negated verb.

Nie znam tego człowieka.

Genitive Prepositions

After do, z, od, bez, dla, u, koło, obok, podczas, według.

Idę do sklepu.

Declension Table

Singular (liczba pojedyncza)

	Masculine	Feminine	Neuter
Adjective ending (przymiotnik)	-ego	-ej	-ego
Noun ending (rzeczownik)	-a (animate) -u (inanimate: domu, stołu)	-y (after hard cons.) -i (after k, g, soft: książki, nocy)	-a
Examples	Dobrego studenta szukam. Starego psa nie ma. Nowego domu nie mam.	Dobrej studentki nie ma. Ciekawej książki nie mam. Długej nocy nie lubię.	Małego dziecka nie ma. Dużego okna nie kupię. Nowego muzeum szukam.

Plural (liczba mnoga)

	Masculine Personal	Non-personal
Adjective ending (przymiotnik)	-ych / -ich dobrych, starych, wysokich	-ych / -ich nowych, dobrych, ciekawych
Noun ending (rzeczownik)	-ów / -y / -i (varies)	-∅ / -ów / -i (varies widely)
Examples	Pięciu dobrych studentów przyszło. Nie ma starych panów. Wiele wysokich chłopców.	Nie ma nowych domów. Dużo ciekawych książek. Wiele małych dzieci.
	Genitive plural noun endings are highly irregular; they vary greatly by noun type and require memorization. The adjective ending -ych / -ich is consistent, but noun endings (-ów, -y, -i, -∅) must be learned noun by noun.

Adjective Questions: Jakiego? Jakiej? Jakiego? Jakich?

Each gender in the Genitive has its own interrogative adjective, the "what kind of?" question word. These question words use the same endings as the adjectives they represent.

Jakiego?

Masculine / rodzaj męski

Adjective ending: -ego

Used to ask about a masculine noun in the genitive. The adjective takes -ego. Animate masculine nouns take -a, inanimate nouns usually take -u in the genitive.

Q Jakiego studenta szukasz?

A Dobrego studenta szukam. "I am looking for a good student."

Q Jakiego domu nie ma?

A Nowego domu nie ma. "There is no new house."

Jakiej?

Feminine / rodzaj żeński

Adjective ending: -ej

Used for feminine nouns in the genitive. The adjective takes -ej, while the noun most commonly takes -y (after hard consonants) or -i (after k, g, or soft consonants).

Q Jakiej książki nie masz?

A Ciekawej książki nie mam. "I don't have an interesting book."

Q Jakiej studentki szukasz?

A Dobrej studentki szukam. "I am looking for a good student (f)."

Jakiego?

Neuter / rodzaj nijaki

Adjective ending: -ego

Neuter nouns share the same genitive adjective ending as masculine: -ego. The noun takes -a in the genitive singular. Neuter nouns typically end in -o, -e, or -ę in the nominative.

Q Jakiego dziecka nie ma w domu?

A Małego dziecka nie ma w domu. "The small child is not at home."

Q Jakiego muzeum szukasz?

A Nowego muzeum szukam. "I am looking for the new museum."

Jakich?

Plural (all genders) / liczba mnoga

Adjective ending: -ych / -ich

In the genitive plural all genders use the same adjective ending: -ych after most consonants, or -ich after k and g. Noun endings vary widely in the genitive plural, this is one of the most challenging forms in Polish.

Q Jakich studentów nie ma?

A Dobrych studentów nie ma. "There are no good students."

Q Jakich książek szukasz?

A Ciekawych książek szukam. "I am looking for interesting books."

Practical Usage Examples

Possession

To jest książka dobrego studenta.

"This is the book of a good student."

Possession in Polish is expressed with the genitive, the possessor takes the genitive form. Here student becomes studenta (animate masculine: -a), and the adjective dobry becomes dobrego.

After Negation (nie mam)

Nie mam ciekawej książki w domu.

"I don't have an interesting book at home."

After negation, the direct object shifts from accusative to genitive. Here ciekawa książka (accusative: ciekawą książkę) becomes ciekawej książki in the genitive after nie mam.

After "do" (to/into)

Idę do nowego muzeum w centrum.

"I am going to the new museum in the centre."

The preposition do (to, into) always requires the genitive. Here the neuter noun muzeum stays unchanged (an indeclinable loanword), while the adjective nowe becomes nowego (-ego for neuter/masculine genitive).

After numbers 5+

Mam pięciu dobrych studentów w grupie.

"I have five good students in the group."

Numbers 5 and above require the genitive plural. Here studenci becomes studentów (-ów), and the adjective dobrzy becomes dobrych. This rule applies to all genders with numbers 5 and above.

Quantifiers + Genitive Plural

Quantifier words always trigger the genitive plural of the noun that follows. They come in masculine personal and non-personal pairs: use the masculine personal form for groups that include at least one man, and the non-personal form for everything else.

Masculine Personal	Non-personal
wielu	wiele
kilku	kilka
paru	parę
niewielu	niewiele
ilu?	ile?

💡 dużo, mało, sporo, trochę, these work for both groups: dużo studentów / dużo studentek.

Masc. Personal

Wielu studentów boi się egzaminów.

Many students are afraid of exams.

Masc. Personal

Kilku turystów zwiedza Kraków.

A few tourists are visiting Kraków.

Masc. Personal

Paru nauczycieli jest złych.

A few teachers are angry.

Non-personal

Wiele studentek będzie pisać test.

Many female students will write the test.

Non-personal

Kilka osób zrezygnowało z dalszego czekania.

A few people gave up waiting.

Non-personal

Sporo dziewczyn boi się myszy.

Quite a few girls are afraid of mice.

Verb Agreement with Genitive Subjects

When the sentence subject is a quantifier or number (5+) + genitive plural noun, the verb always takes the 3rd person singular neuter form, regardless of the gender or count of the people or things described. This applies in all tenses.

Key rule: the verb is always neuter singular (pisało, zginęło, było), never pisali or zginęli. The neuter form is the signal that a genitive subject is driving the sentence.

Tense	Polish	English
Present	Wielu studentów pisze test.	Many students are writing the test.
Past (impf.)	Wielu studentów pisało test.	Many students were writing the test.
Future (impf.)	Wielu studentów będzie pisało test.	Many students will be writing the test.
Future (pf.)	Wielu studentów napisze test.	Many students will write the test.
Past (pf.)	Wielu studentów napisało test.	Many students have written the test.

More examples

Zginęło trzydziestu żołnierzy.

Thirty soldiers died.

Na spotkaniu było czterech Polaków.

There were four Poles at the meeting.

Kilka dni było pochmurnych.

A few days were cloudy.

Aresztowano siedmiu Ukraińców.

Seven Ukrainians were arrested.

Impersonal Genitive Verbs

A group of impersonal verbs express change in quantity or availability using the structure: verb + dative (mi / ci / mu…) + genitive noun. The verb is always neuter singular.

przybywa / przybyło / przybędzie

something is growing / increasing for me

Przybywa mi lat.

I'm getting older (the years are piling up).

Przybyło mi zbędnych kilogramów.

I gained some extra kilograms.

Jeśli będę jadł słodycze, przybędzie mi kilogramów.

If I eat sweets, I'll gain weight.

ubywa / ubyło / ubędzie

something is shrinking / decreasing for me

Ubywa mi włosów.

I'm losing hair.

Ubywa mi pieniędzy.

My money is running out.

Ubyło mi kilogramów.

I lost some weight.

brakuje / brakowało / zabrakło

I am lacking / I miss something

Brakuje mi pieniędzy.

I'm short on money.

Brakuje mi wolnego czasu.

I lack free time.

Brakuje mi was.

I miss you all.

starcza / nie starcza

I have enough / not enough of something

Starcza mi pieniędzy.

I have enough money.

Nie starcza mi czasu.

I don't have enough time.

Nie starcza mi sił i cierpliwości.

I don't have enough strength and patience.

All four verbs are neuter singular and impersonal, they never agree with the subject's gender or number. The thing that grows, shrinks, or is missing is always in the genitive.