because they don't hafta
because they do have
conj pro:sub mod mod
because they don't hafta ?
b ɪ k ʌ z WORD_BOUNDARY ð eɪ WORD_BOUNDARY d oʊ n t WORD_BOUNDARY h æ f t ə WORD_BOUNDARY
b e c a u s e WORD_BOUNDARY t h e y WORD_BOUNDARY d o n ' t WORD_BOUNDARY h a f t a WORD_BOUNDARY