I couldn't I couldn't
I could I could
pro:sub mod pro:sub mod
i couldn't i couldn't.
aɪ WORD_BOUNDARY k ʊ d ə n t WORD_BOUNDARY aɪ WORD_BOUNDARY k ʊ d ə n t WORD_BOUNDARY
i WORD_BOUNDARY c o u l d n ' t WORD_BOUNDARY i WORD_BOUNDARY c o u l d n ' t . WORD_BOUNDARY