they're playing aren't they
they play be they
pro:sub part aux pro:sub
they're playing aren't they ?
ð eɪ ə WORD_BOUNDARY p l eɪ ɪ ŋ WORD_BOUNDARY ɑː n t WORD_BOUNDARY ð eɪ WORD_BOUNDARY
t h e y ' r e WORD_BOUNDARY p l a y i n g WORD_BOUNDARY a r e n ' t WORD_BOUNDARY t h e y WORD_BOUNDARY