I don't understand why
i don't understand why.
aɪ WORD_BOUNDARY d oʊ n t WORD_BOUNDARY ʌ n d ə ɹ s t æ n d WORD_BOUNDARY w aɪ WORD_BOUNDARY
i WORD_BOUNDARY d o n ' t WORD_BOUNDARY u n d e r s t a n d WORD_BOUNDARY w h y . WORD_BOUNDARY