I I I heard it before
I I I hear it before
pro:sub pro:sub pro:sub v pro:per adv
i i i heard it before .
aɪ WORD_BOUNDARY aɪ WORD_BOUNDARY aɪ WORD_BOUNDARY h ɜː d WORD_BOUNDARY ɪ t WORD_BOUNDARY b ɪ f oː ɹ WORD_BOUNDARY
i WORD_BOUNDARY i WORD_BOUNDARY i WORD_BOUNDARY h e a r d WORD_BOUNDARY i t WORD_BOUNDARY b e f o r e WORD_BOUNDARY