wie

In a sentence

• Ona wie, że musi odrobić lekcje.

  She knows that she has to do her homework.

  In this sentence, 'wie' is the third-person singular form of the verb 'wiedzieć', meaning 'to know'. It is used here to indicate the subject's knowledge about having to do homework.

• Kiedy on wie, co robić?

  When does he know what to do?

  Here, 'wie' again represents the third-person singular form of 'wiedzieć', used in a question format to inquire about the timing of someone's knowledge or understanding.

• Nie wiem, czy on wie.

  I do not know if he knows.

  In this example, 'wie' is used in a subordinate clause to express the third-person singular understanding, following a condition set by the main clause where the speaker ('I') doesn't know the fact.