Questions & Answers about Ten sweter jest za ciasny.
Ten means this and agrees with the noun sweter.
Because sweter is:
- masculine
- singular
- in the nominative case (the basic dictionary form, used here because sweter is the subject)
the correct form is ten.
Compare:
- ten sweter = this sweater
- ta koszulka = this T-shirt
- to ubranie = this piece of clothing / this garment
Sweter is simply the Polish word for sweater. It is a masculine noun.
Its nominative singular form is sweter, and that is the form used here because it is the subject of the sentence:
- Ten sweter = this sweater
Other forms change depending on case, for example:
- Nie mam tego swetra = I don’t have this sweater
- Przyglądam się temu swetrowi = I am looking at this sweater
But in this sentence, the basic form sweter is correct.