което

In a sentence

• Това е книгата, която прочетох миналата седмица.

  This is the book that I read last week.

  Here, 'което' is used as a relative pronoun to refer to an antecedent (the book) connecting the main clause to the subordinate clause.

• Не разбрах точно това, което каза.

  I did not understand exactly what you said.

  In this case, 'което' functions as a relative pronoun pointing to a specific detail or idea expressed just before it.

• Бях изненадан от случилото се, което не очаквах.

  I was surprised by what happened, which I didn’t expect.

  Here, 'което' is used to introduce additional information about a statement or event mentioned previously.