if you don't hafta you don't hafta
if you do have you do have
conj pro:per mod mod pro:per mod mod
if you don't have to you don't hafta.
ɪ f WORD_BOUNDARY j uː WORD_BOUNDARY d oʊ n t WORD_BOUNDARY h æ v WORD_BOUNDARY t ə WORD_BOUNDARY j uː WORD_BOUNDARY d oʊ n t WORD_BOUNDARY h æ f t ə WORD_BOUNDARY
i f WORD_BOUNDARY y o u WORD_BOUNDARY d o n ' t WORD_BOUNDARY h a v e WORD_BOUNDARY t o WORD_BOUNDARY y o u WORD_BOUNDARY d o n ' t WORD_BOUNDARY h a f t a . WORD_BOUNDARY