can't say that I have
(I) can't say that I have,and (I) can't say's I have.; (I) can't say (as) I have.
Fig. a vague response to a question about whether one has ever done something or been somewhere. (A polite way of saying no.) Bill: Have you ever been to a real opera? Bob: I can't say as I have. Mary: Well, have you thought about going with me to Fairbanks? Fred: I can't say I have, actually.