I don't believe it
I do believe it
pro:sub mod v pro:per
i don't believe it !
aɪ WORD_BOUNDARY d oʊ n t WORD_BOUNDARY b ɪ l iː v WORD_BOUNDARY ɪ t WORD_BOUNDARY
i WORD_BOUNDARY d o n ' t WORD_BOUNDARY b e l i e v e WORD_BOUNDARY i t WORD_BOUNDARY