W tej koszuli brakuje guzika, a zamek w kurtce nie działa dobrze.

This shirt is missing a button, and the zipper in the jacket does not work well.

Breakdown of W tej koszuli brakuje guzika, a zamek w kurtce nie działa dobrze.

• w: in
• nie: not
• a: and
• ta: this

Questions & Answers about W tej koszuli brakuje guzika, a zamek w kurtce nie działa dobrze.

Why is it w tej koszuli and w kurtce instead of the dictionary forms ta koszula and kurtka?

Because w here means in and refers to a location, so it requires the locative case.

• ta koszula → w tej koszuli
• ta kurtka → w tej kurtce

So both the noun and any matching word like ten/ta/to change form.

Why is it tej, not ta?

Tej is the locative singular feminine form of ta.

It has to match koszuli, because Polish words that describe or point to nouns must agree with them in:

• gender
• number
• case

Since koszula is feminine singular, and after w we need the locative here, ta changes to tej.

Why does koszula become koszuli?

Because koszula is in the locative singular after w.

This is a normal pattern for many feminine nouns ending in -a:

• koszula → w koszuli
• kurtka → w kurtce
• szafa → w szafie

So koszuli does not mean a different word; it is just the case form of koszula.