they're ducks aren't they
they duck be they
pro:sub n aux pro:sub
they're ducks aren't they?
ð eɪ ə WORD_BOUNDARY d ʌ kʰ s WORD_BOUNDARY ɑː n tʰ WORD_BOUNDARY ð eɪ WORD_BOUNDARY
t h e y ' r e WORD_BOUNDARY d u c k s WORD_BOUNDARY a r e n ' t WORD_BOUNDARY t h e y ? WORD_BOUNDARY