ktorý

In a sentence

• Vidím chlapca, ktorý číta knihu.

  I see a boy who is reading a book.

  The word 'ktorý' introduces a subordinate clause that defines or describes the noun 'chlapca' (the boy). It's a relative pronoun connecting the main clause to the descriptive clause.

• Bol to deň, ktorý si vždy budem pamätať.

  It was a day that I will always remember.

  Here, 'ktorý' refers to the noun 'deň' (day) and introduces additional information about it. It's functioning as a connector to specify which day is being talked about.

• Ona je tá žena, o ktorej som ti hovoril.

  She is the woman about whom I talked to you.

  In this sentence, the relative pronoun 'ktorý' is in the genitive case ('ktorej') to agree with the preposition 'o' and the noun it refers to, indicating its usage within a prepositional phrase.