Czytelnik odszedł z czytelni.

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Breakdown of Czytelnik odszedł z czytelni.

• czytelnik: the reader
• czytelnia: the reading room
• odejść: to leave or walk away

Questions & Answers about Czytelnik odszedł z czytelni.

Why is it z czytelni, not z czytelnia?

Because after z meaning from / out of, Polish uses the genitive case.

The base form is czytelnia = reading room.
Its genitive singular form is czytelni.

So:

• czytelnia = nominative, dictionary form
• z czytelni = from the reading room

This is very common in Polish:

• z domu = from the house
• z pracy = from work
• z biblioteki = from the library

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Does z always take the same case in Polish?

No. z can take different cases depending on the meaning.

Most importantly:

• z + genitive = from / out of
• z + instrumental = with

So in this sentence:

• z czytelni = from the reading room → genitive

Compare:

• z kolegą = with a friend → instrumental

This is a very common thing learners ask about, because English uses the same word with/from very differently, while Polish changes the case.

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What exactly is czytelnia? Is it the same as biblioteka?