I couldn't do this
I could do this
pro:sub mod v pro:dem
i couldn't do this .
aɪ WORD_BOUNDARY k ʊ d ə n t WORD_BOUNDARY d uː WORD_BOUNDARY ð ɪ s WORD_BOUNDARY
i WORD_BOUNDARY c o u l d n ' t WORD_BOUNDARY d o WORD_BOUNDARY t h i s WORD_BOUNDARY