Instrumental Predicate Nouns

Level 1

When you say 'I am a student' or 'He is a Pole' in Polish, you don't use the basic dictionary form (nominative). Instead, you use the instrumental case to show that the noun represents a category or role.

How It Works

In Polish, the instrumental case is used for the 'predicate noun'—the noun that follows the verbs być (to be), zostać (to become), or okazać się (to turn out to be).

1. When to use it:
Use this construction when a specific subject (a noun like mój brat or a pronoun like on) is linked to a category or role. It focuses on the person's function or identity.

  • On jest lekarzem. (He is a doctor.)
  • Mój brat został inżynierem. (My brother became an engineer.)
  • On okazał się dobrym przyjacielem. (He turned out to be a good friend.)

2. Common Endings:

  • Masculine/Neuter: Usually ends in -em. If the stem ends in 'k' or 'g', it becomes -kiem/-giem (e.g., Polakiem). If the stem ends in a soft consonant like ś, ć, ń, ź, dź, replace the acute-accent spelling with si, ci, ni, zi, dzi before -em (e.g., uczeń becomes uczniem). Stems in j and l simply take -em: pokojem, nauczycielem. Note: Masculine nouns ending in -a (like tata) take the feminine ending -ą (e.g., tatą).
  • Feminine: Usually ends in -ą (e.g., nauczycielką).
  • Plural: Most nouns end in -ami (e.g., studentami), but high-frequency words like dziećmi (children) and ludźmi (people) use -mi.

3. Important Distinctions:

  • The 'To' Exception: If you use the word 'to' to identify someone (e.g., To jest lekarz), the noun stays in the nominative case.
  • Adjectives: If you use an adjective alone without a noun, it stays in the nominative (e.g., On jest wysoki). The instrumental is only required for the noun and any adjectives describing that noun (e.g., On jest wysokim mężczyzną).

Examples (5)

  1. Mój brat jest utalentowanym inżynierem.

    My brother is a talented engineer.

    Word by Word: My brother is [with] talented engineer.

    Both the adjective 'utalentowanym' and the noun 'inżynierem' take instrumental endings because they describe the subject's profession.

  2. Czy chcesz zostać lekarką?

    Do you want to become a doctor?

    Word by Word: Whether [you] want to become [with] doctor?

    The verb 'zostać' (to become) also requires the instrumental case for the resulting role.

  3. Oni są dumnymi Polakami.

    They are proud Poles.

    Word by Word: They are [with] proud Poles.

    Nationalities are treated as identities/roles and must be in the instrumental case.

  4. Jestem studentem w Krakowie.

    I am a student in Krakow.

    Word by Word: [I] am [with] student in Krakow.

    A classic example of using the instrumental for a temporary or social role like being a student.

  5. Moja mama jest świetną kucharką.

    My mother is a great cook.

    Word by Word: My mother is [with] great cook.

    Feminine nouns like 'kucharka' change the ending to '-ą' in the instrumental.

Common Mistakes

  • Using the nominative case after 'jestem/jesteś'.

    Jestem nauczyciel.
    Jestem nauczycielem.

    In Polish, you cannot use the dictionary form (nominative) for a profession after 'to be'. It must be instrumental.

  • Using the instrumental for adjectives alone.

    On jest zmęczonym.
    On jest zmęczony.

    If there is no noun, the adjective stays in the nominative. Only use instrumental if a noun follows (e.g., 'On jest zmęczonym człowiekiem').

  • Mixing 'to jest' with the instrumental case.

    To jest lekarzem.
    To jest lekarz.

    When using the 'To jest...' (This is...) construction for identification, you must use the nominative case.

How It Connects

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Instrumental Predicate NounsLevel 1

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Learn Identity With The Instrumental before Instrumental Predicate Nouns.

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