Być (to be) in Polish

In Brief

Polish być means “to be.” Its present forms are jestem, jesteś, jest, jesteśmy, jesteście, są, and the ending usually makes subject pronouns unnecessary: Jestem w domu means “I am at home.” After być, an adjective normally agrees with the subject, while a noun naming a profession, role, or identity usually takes the instrumental case: Ona jest zmęczona, but Ona jest lekarką.

Overview

Być is one of the essential Polish verbs. You use it to identify and describe people and things, give locations, talk about time, and form many later verb structures. This is an A1 topic, but mastering it early makes everyday sentences such as Jestem gotowy (“I am ready”) and Gdzie jesteś? (“Where are you?”) much easier.

English has the forms “am,” “is,” and “are”; Polish distinguishes all six grammatical persons in the present tense. A grammatical person simply tells you whether the subject is the speaker, the listener, or somebody else. Since jestem can only mean “I am,” Polish normally does not need ja (“I”). Pronouns are added when they create emphasis or contrast: Ja jestem gotowy, ale on nie jest (“I am ready, but he is not”).

Polish also changes the endings of nouns and adjectives according to their function. These sets of forms are called cases. The most important contrast here is simple: a descriptive adjective stays in the nominative (the basic subject form), but a profession or role expressed by a noun usually appears in the instrumental (a form often used for what someone is or becomes).

How It Works

Present-tense forms

The infinitive (the dictionary form of a verb) is być. Its present tense is irregular and must be learned as a set.

Person	Polish	English
ja	jestem	I am
ty	jesteś	you are (one person, informal)
on / ona / ono	jest	he / she / it is
my	jesteśmy	we are
wy	jesteście	you are (more than one person, informal)
oni / one	są	they are

Notice the written accents in jesteś, jesteśmy, and jesteście, and the separate form są. They are part of the spelling, not optional marks.

Polish usually omits the subject pronoun because the verb already identifies the person:

• Jestem z Kanady. — “I am from Canada.”
• Jesteście gotowi? — “Are you all ready?”
• Są w pracy. — “They are at work.”

Use a pronoun for contrast, correction, or special emphasis: Ty jesteś z Warszawy, a ja z Gdańska (“You are from Warsaw, and I am from Gdańsk”). In the second part, even the verb can be understood from context.

Statements, negatives, and questions

A basic statement follows the pattern subject + form of być + information, although Polish word order is flexible:

• Marek jest spokojny. — “Marek is calm.”
• Książki są na stole. — “The books are on the table.”

To make a negative, put nie directly before the verb: nie jestem, nie jesteś, nie jest, nie jesteśmy, nie jesteście, nie są. Unlike English, Polish does not add an auxiliary like “do.”

• Nie jestem głodna. — “I am not hungry.” (said by a woman)
• Oni nie są tutaj. — “They are not here.”

A yes/no question can begin with czy, roughly a spoken question marker, but everyday speech also uses statement order with question intonation:

• Czy jesteś zajęty? — “Are you busy?”
• Jesteś zajęty? — “Are you busy?”

Question words come naturally before the verb: Gdzie jesteście? (“Where are you?”), Kim ona jest? (“Who/what is she by profession or role?”), Jaki on jest? (“What is he like?”).

Adjectives agree with the subject

An adjective is a describing word such as “tired” or “ready.” After być, it agrees with the subject in gender and number. In other words, its ending reflects who or what is being described.

Subject	Example	English
masculine singular	Paweł jest zmęczony.	Paweł is tired.
feminine singular	Ewa jest zmęczona.	Ewa is tired.
neuter singular	Dziecko jest zmęczone.	The child is tired.
masculine-personal plural	Studenci są zmęczeni.	The students are tired.
other plural	Studentki są zmęczone.	The female students are tired.

With ja or ty, choose the form that matches the person: a man says Jestem gotowy; a woman says Jestem gotowa. English “I am ready” does not reveal this distinction, so the Polish ending needs deliberate attention.

Nouns for professions, roles, and identity

A noun names a person, place, thing, or idea. When a noun after być says what somebody is—a profession, role, nationality, or type—it normally takes the instrumental case.

Basic noun	Instrumental form	Example
nauczyciel (teacher, man)	nauczycielem	Jestem nauczycielem.
lekarka (doctor, woman)	lekarką	Ona jest lekarką.
Polak (Polish man)	Polakiem	On jest Polakiem.
studentka (female student)	studentką	Maria jest studentką.

A modifying adjective must also take instrumental: On jest dobrym lekarzem (“He is a good doctor”), Ona jest nową kierowniczką (“She is a new manager”). Do not try to derive every ending at once; first learn useful phrases as complete units.

There is an important beginner-friendly alternative with to (“this/that/it is” or a linking word). In definitions and identifications, the noun after to remains in its basic nominative form:

• Anna jest lekarką. — “Anna is a doctor.”
• Anna to lekarka. — “Anna is a doctor.”
• To jest lekarka. — “This is a doctor.”

The first sentence uses być plus instrumental. The second uses the common X to Y identification pattern and no present-tense jest. The third means “This is …” and naturally keeps the noun in the basic form. These patterns are related, but they should not be mixed into forms such as incorrect Anna jest lekarka.

Location, origin, possession, and time

For location, być is followed by a location phrase: w domu (“at home”), w Polsce (“in Poland”), na dworcu (“at the station”). The preposition controls the noun ending.

Origin commonly uses z: Jestem z Anglii (“I am from England”). Polish does not normally use być to express possession in the English pattern “I am having.” Instead, Mam samochód means “I have a car.”

To tell the time, use third-person singular jest with one o’clock and są with plural-number hours:

• Jest pierwsza. — “It is one o’clock.”
• Są dwie. — “It is two o’clock.”

Past tense

The past forms of być show person, number, and gender. Learn the forms that describe you first.

Person	Masculine	Feminine	English
ja	byłem	byłam	I was
ty	byłeś	byłaś	you were
on / ona / ono	był	była / było	he / she / it was
my	byliśmy	byłyśmy	we were
wy	byliście	byłyście	you were
oni / one	byli	były	they were

Masculine-personal plural means a group containing at least one male person: byliśmy, byliście, byli. Groups of women, animals, objects, and other non-masculine-personal subjects use byłyśmy, byłyście, były. Thus Byliśmy w domu may describe a mixed group, while an all-female group says Byłyśmy w domu.

Future tense

The future forms are also irregular, but they do not change for gender:

Person	Polish	English
ja	będę	I will be
ty	będziesz	you will be
on / ona / ono	będzie	he / she / it will be
my	będziemy	we will be
wy	będziecie	you will be
oni / one	będą	they will be

Examples include Będę w biurze jutro (“I will be in the office tomorrow”) and Dzieci będą zmęczone (“The children will be tired”).

Examples in Context

Polish	English	Note
Jestem nauczycielem.	I am a teacher.	Profession noun in instrumental
Ona jest zmęczona.	She is tired.	Feminine adjective agrees with ona
To jest zimne.	This/It is cold.	Neuter adjective agrees with to
Jesteś teraz w domu?	Are you at home now?	Natural question without czy
Nie jesteśmy gotowi.	We are not ready.	nie comes before the verb
Moi rodzice są w Krakowie.	My parents are in Kraków.	Third-person plural są
Kim pan jest?	What do you do?/What is your profession?	Formal address; literally “Who are you?” in instrumental
Marta to moja siostra.	Marta is my sister.	Identification with to and nominative
To jest mój nowy sąsiad.	This is my new neighbor.	Presentation pattern to jest
Ja jestem z Irlandii, a ona z Polski.	I am from Ireland, and she is from Poland.	Pronoun marks contrast; second jest is omitted
Byliśmy w domu.	We were at home.	Past, masculine-personal or mixed group
Wczoraj restauracja była zamknięta.	Yesterday the restaurant was closed.	Feminine past form and adjective
Kiedy będziesz wolna?	When will you be free?	Addressed to a woman
Jutro będą w Warszawie.	Tomorrow they will be in Warsaw.	Future third-person plural

Common Mistakes

Using one present form for every person

• Wrong: Ja jest studentem.
• Right: Jestem studentem.
• Why: Jest means “he/she/it is.” With ja, use jestem. The pronoun can normally be omitted.

Leaving a profession noun in its basic form

• Wrong: Ona jest lekarka.
• Right: Ona jest lekarką.
• Also right: Ona to lekarka.
• Why: A noun after jest that names a profession normally takes instrumental. The X to Y pattern instead uses the basic form.

Putting a simple adjective in instrumental

• Wrong: Marek jest zmęczonym.
• Right: Marek jest zmęczony.
• Why: A standalone descriptive adjective agrees with the subject in nominative. Instrumental is needed when the adjective modifies an instrumental noun: Marek jest zmęczonym lekarzem (“Marek is a tired doctor”).

Forgetting gender in adjectives and the past tense

• Wrong: Jestem gotowy, said by a woman.
• Right: Jestem gotowa.
• Why: Polish adjectives reflect gender. In the past, the verb does too: a woman says byłam, while a man says byłem.

Copying English “to be” expressions directly

• Wrong: Jestem 30 lat.
• Right: Mam 30 lat.
• Why: Polish uses mieć (“to have”) for age: literally, “I have 30 years.” Similar everyday meanings do not always select the same verb as English.

Adding czy inside the statement

• Wrong: Jestem czy gotowy?
• Right: Czy jestem gotowy? or Jestem gotowy?
• Why: In a yes/no question, czy normally stands at the beginning. It is not the Polish equivalent of English “am” or “is.”

Usage Notes

Polish subject pronouns are less frequent than English ones. Repeating ja in a neutral description—Ja jestem Adam. Ja jestem studentem. Ja jestem z Londynu—sounds unnecessarily emphatic. A more natural introduction is Jestem Adam. Jestem studentem. Jestem z Londynu. Use ja when you mean “I, in contrast to somebody else.”

Formal address affects verb agreement. Pan (“sir/Mr.”) and pani (“madam/Ms.”) take third-person singular: Czy pan jest gotowy?, Czy pani jest gotowa? The plural państwo takes third-person plural: Czy są państwo gotowi? This differs from English, where formal and informal “you” use the same verb form.

In short answers, Polish often leaves out material that is obvious. To Jesteś gotowa? you can answer Tak, jestem (“Yes, I am”) or simply Tak. To Gdzie jest klucz?, a natural answer is Na stole (“On the table”), without repeating jest.

Beyond the Basics

You do not need to master these points at A1, but you will meet them frequently.

The X to Y pattern often omits the present copula (the linking verb corresponding to “is”): Warszawa to stolica Polski (“Warsaw is the capital of Poland”). In past and future reference, a form of być can appear alongside to: Warszawa była wtedy małym miastem uses ordinary być plus instrumental, while more complex to constructions depend on style and emphasis. For now, treat X to Y and X jest Y-instrumental as two reliable models.

Present być may also be omitted in headlines, labels, proverbs, and compressed speech. English speakers should not therefore conclude that Polish never uses “is.” Neutral descriptions regularly require it: Pokój jest mały (“The room is small”), and locations require it unless context licenses an elliptical answer: Kasia jest w pracy (“Kasia is at work”).

Forms of być help build other grammar. The future forms będę, będziesz, and so on combine with imperfective verbs to make one kind of future tense: Będę pracować (“I will be working/I will work”). Conditional forms attach endings to the past stem: byłbym (“I would be,” masculine speaker), byłabym (feminine speaker). These are later topics, but recognizing the shared forms makes them easier.

Finally, bywać is a related verb meaning “to be somewhere from time to time” or “to frequent”: Bywam tu często (“I am here often/I come here often”). It is not a replacement for ordinary być and is best learned after the basic tense system is secure.

Practice Tips

1. Build a six-person chain. Say one useful sentence with every present form: jestem, jesteś, jest, jesteśmy, jesteście, są. Change both the person and the adjective ending where necessary.
2. Practice two identity patterns side by side. Pair Ona jest lekarką with Ona to lekarka, or Piotr jest studentem with Piotr to student. This makes the instrumental contrast memorable without relying on abstract rules alone.
3. Record a three-time introduction. Say where you are today, where you were yesterday, and where you will be tomorrow. Check your gender in byłem/byłam and your plural choice in byli/były.

Related Concepts

• Prerequisite: Personal Pronouns — learn the subjects associated with each form of być.
• Next step: Existential Constructions — explore how Polish expresses that something exists or is present.
• Later topic: Impersonal Constructions — compare sentences with no specific personal subject.