we didn't buy them
we do buy them
pro:sub mod v pro:obj
we didn't buy them .
w iː WORD_BOUNDARY d ɪ d n t WORD_BOUNDARY b aɪ WORD_BOUNDARY ð ɛ m WORD_BOUNDARY
w e WORD_BOUNDARY d i d n ' t WORD_BOUNDARY b u y WORD_BOUNDARY t h e m WORD_BOUNDARY