She's always 'harping on' the importance of a good diet.
My mother was always 'harping at' me to clean my room.
He seems to enjoy 'harping on' my shortcomings.
(..) Ran out on you like a bandit... without any explanation. l never asked for any. You don't have to explain to me. l always thought it was good what you did. Why harp on it? You were right to leave. You did what you wanted to do. When l call you, a different woman always answers. But l never heard (..)1988 Cinema Paradiso