we're busy aren't we
we busy be we
pro:sub adj aux pro:sub
we're busy aren't we ?
w iə WORD_BOUNDARY b ɪ z i WORD_BOUNDARY ɑː n t WORD_BOUNDARY w iː WORD_BOUNDARY
w e ' r e WORD_BOUNDARY b u s y WORD_BOUNDARY a r e n ' t WORD_BOUNDARY w e WORD_BOUNDARY