Verb 'by07' (to be) 6 present tense forms

Verb 'być' (to be) 6 present tense forms

What does 'by07' mean?
'By07' is the Polish verb meaning "to be." It is an irregular and very common verb used to:
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[*]link a subject with a noun or adjective (I am a student; she is happy),
[*]say where someone/something is (I am at home),
[*]tell the time or date (It is six o'clock; Today is Monday),
[*]express existence (There is / There are), and
[*]form the passive voice together with a past participle (The door is closed).
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When do I use the present tense of 'by07'?
Use the present tense of 'by07' when you talk about:
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[*]identity or role: "Jestem studentem." (I am a student.)
[*]current state or condition: "Jeste5b zm19czony." (You are tired.)
[*]location: "Jestem w domu." (I am at home.)
[*]time and dates: "Jest pi05tek." (It27s Friday.)
[*]existence: "Jest kot na stole." (There is a cat on the table.)
[*]present passive: "Okno jest otwarte." (The window is open / is opened.)
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How do I form the present tense of 'by07' (conjugation)?
'By07' is irregular. Memorize these forms (standard contemporary Polish):

[code]
Person Polish English
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1st singular ja jestem I am
2nd singular ty jeste5b you are (sing., informal)
3rd singular on/ona/ono jest he / she / it is
1st plural my jeste5bmy we are
2nd plural wy jeste5bcie you are (pl.)
3rd plural oni / one s05 they are

Formal address Pan / Pani jest (You - formal, uses 3rd singular)

Negative forms:
ja nie jestem, ty nie jeste5b, on/ona/ono nie jest, my nie jeste5bmy,
wy nie jeste5bcie, oni/one nie s05
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Short examples (each in Polish, then English translation):
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[*]Ja jestem Anna. 5 (I am Anna.)
[*]Ty jeste5b z Polski? 5 (Are you from Poland?)
[*]On jest lekarzem. 5 (He is a doctor.)
[*]Ona jest w kuchni. 5 (She is in the kitchen.)
[*]My jeste5bmy gotowi. 5 (We are ready.)
[*]Wy jeste5bcie bardzo mili. 5 (You (pl.) are very kind.)
[*]Oni s05 w parku. 5 (They are in the park.)
[*]Nie jestem głodny. 5 (I am not hungry.)
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How do I use 'by07' with nouns and adjectives?
- For professions, roles and many states Polish usually uses the instrumental case:
"Jestem nauczycielem." (male speaker) / "Jestem nauczycielk05." (female speaker)
Incorrect: "Jestem nauczyciel" (this is not standard).

- After the word "to" (this/it) we commonly use the nominative case:
"To jest mój brat." (This is my brother.) or "To jest kot." (This is a cat.)

- With adjectives, the adjective must agree in gender and number with the subject:
"Jestem zm19czony." (male) / "Jestem zm19czona." (female)
"Jeste5bmy szcz195bliwi." (mixed or male group) / "Jeste5bmy szcz195bliwe." (all-female group)

Tip: If you27re describing someone27s job or role, use the instrumental (lekarzem, studentem, nauczycielk05).

How do I say "there is / there are" and "there isn't"?
- Existential ("there is / there are") uses third-person forms:
"Jest kot." (There is a cat.) and "S05 trzy koty." (There are three cats.)
- To say "there isn't / there are no ..." normally use nie ma + genitive:
"Nie ma mleka." (There is no milk.)

Compare:
- "Nie ma mleka." = There isn't any milk (absence / not present).
- "Mleko nie jest białe." = The milk is not white (negation of a property).

How do I make passive sentences with 'by07' in the present?
The passive is formed with 'by07' + past participle (the participle agrees in gender/number when needed):
- "Drzwi s05 zamkni19te." (The doors are closed.)
- "Dom jest zbudowany." (The house is built.)

Note: Polish distinguishes between "jest budowany" (is being built -- ongoing, imperfective) and "jest zbudowany" (has been built / is built -- perfective result).

Questions, short answers and formal address
- Yes / No short answers:
"Czy jeste5b gotowy?" 5 "Tak, jestem." / "Nie, nie jestem." (Are you ready? Yes, I am. / No, I'm not.)
- Formal "you": use Pan / Pani with 3rd-person form:
"Czy pani jest gotowa?" (Are you ready, madam?) Reply: "Tak, jestem." or more fully "Tak, jestem gotowa."

Common mistakes to avoid
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[*]Using 'by07' for age. In Polish age uses 'mie': "Mam 20 lat." (Not "Jestem 20 lat.")
[*]Confusing "nie ma" (there isn't) with "nie jest" (is not). Use "nie ma" for absence.
[*]Using nominative for professions after "by07". Say "Jestem lekarzem," not "Jestem lekarz."
[*]Saying "Jestem zimny" to mean "I am cold" (temperature). Use "Jest mi zimno" or "Jestem zmarzni19ty/a." "Jestem zimny" sounds like "I am a cold person."
[*]Using the plural/third-person forms incorrectly with "Pan/Pani". Formal you = third singular (Pan jest, Pani jest).
[*]For existence, forgetting to use correct number: "Jest kot" (one) vs "S05 koty" (more than one).
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Pronunciation notes (quick)
- jestem [ˈjɛstɛm]
- jeste5b [ˈjɛstɛɕ]
- jest [jɛst]
- jeste5bmy [jɛˈstɛɕmɨ]
- jeste5bcie [jɛˈstɛɕt͡ɕɛ]
- s05 [s54̃]

Quick reference: Present tense + one example each
[code]
ja jestem -> Ja jestem Anna. (I am Anna.)
ty jeste5b -> Ty jeste5b z Anglii? (Are you from England?)
on jest -> On jest moim bratem. (He is my brother.)
my jeste5bmy -> My jeste5bmy w kinie. (We are at the cinema.)
wy jeste5bcie-> Wy jeste5bcie sp19kani. (You (pl.) are worried.)
oni/one s05 -> Oni s05 lekarzami. (They are doctors.)
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Glossary (simple)
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[*]copula 5 the verb that links subject and predicate (English "to be").
[*]instrumental case 5 the noun form used after certain verbs to express role/occupation (e.g., "lekarzem").
[*]nominative case 5 the basic dictionary form of a noun (used after "to jest").
[*]existential use 5 using "jest/s05" to say "there is/there are."
[*]auxiliary verb 5 "by07" is also used as an auxiliary in other tenses (e.g., future: "b19d19").
[*]past participle 5 (e.g., "zrobiony") used with "by07" to make the passive.
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If you learn the six present forms (jestem, jeste5b, jest, jeste5bmy, jeste5bcie, s05) and the main uses above, you will be well prepared to use 'by07' correctly in everyday Polish. Practice reading and making short sentences (identity, location, time, existence) and pay attention to case (instrumental vs nominative) after the verb.