I didn't hear anything
I do hear anything
pro:sub mod v pro:indef
i didn't hear anything .
aɪ WORD_BOUNDARY d ɪ d n t WORD_BOUNDARY h ɪ ɹ WORD_BOUNDARY ɛ n ɪ θ ɪ ŋ WORD_BOUNDARY
i WORD_BOUNDARY d i d n ' t WORD_BOUNDARY h e a r WORD_BOUNDARY a n y t h i n g WORD_BOUNDARY