you didn't hear anything
you do hear anything
pro:per mod v pro:indef
you didn't hear anything?
j uː WORD_BOUNDARY d ɪ d n t WORD_BOUNDARY h ɪ ɹ WORD_BOUNDARY ɛ n ɪ θ ɪ ŋ WORD_BOUNDARY
y o u 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