1noHayi, andazi — No, I do not know
2ngokungekho sikweniall rightOKHayi ke, Simphiwe, mandikushiye — OK then, Simphiwe, let me leave you
In informal speech, 'hayi' is often used when people actually mean 'yes'. For example, in reply to the question 'Usaphila?' you often hear the answer 'Hayi, ndisaphila', meaning 'Yes, I am fine.'