Questions & Answers about Ten krój jest dobry.
Because ten has to agree with krój in gender, number, and case.
- krój is masculine singular
- in the nominative singular, the masculine form of this is ten
So:
- ten krój = this cut/style
- ta would be for a feminine noun
- to would be for a neuter noun
This kind of agreement is very important in Polish.
A very common clue in Polish is the noun ending.
That is why it takes:
- ten rather than ta or to
- dobry rather than dobra or dobre
So the sentence gives you two clues that krój is masculine: the demonstrative ten and the adjective dobry.