was dauert so lange
was dauern so lange
pro v adv adv
was dauert so lange ?
v a s WORD_BOUNDARY d aʊ ɐ t WORD_BOUNDARY z oː WORD_BOUNDARY l a ŋ ə WORD_BOUNDARY
w a s WORD_BOUNDARY d a u e r t WORD_BOUNDARY s o WORD_BOUNDARY l a n g e WORD_BOUNDARY