we mustn't touch them
we must touch them
pro:sub mod v pro:obj
we mustn't touch them .
w iː WORD_BOUNDARY m ʌ s ə n t WORD_BOUNDARY t ʌ t̠ʃ WORD_BOUNDARY ð ɛ m WORD_BOUNDARY
w e WORD_BOUNDARY m u s t n ' t WORD_BOUNDARY t o u c h WORD_BOUNDARY t h e m WORD_BOUNDARY