preto

In a sentence

• On sa necíti dobre, a preto ostane doma.

  He is not feeling well, and therefore he will stay at home.

  This usage of 'preto' is to indicate a cause-and-effect relationship, explaining the reason for staying at home.

• Mala veľa práce, preto prišla neskoro.

  She had a lot of work, thus she arrived late.

  Here, 'preto' is employed to explain the consequence of having a lot of work, which is her late arrival.

• Nebola pripravená, preto spravila chybu.

  She wasn't prepared, so she made a mistake.

  In this context, 'preto' signals the reason behind making a mistake—her lack of preparation.