es fliegt immer tiefer
es fliegen immer tief
pro:per v adv adj
es fliegt immer tiefer ?
 ɛ s WORD_BOUNDARY f l iː k t WORD_BOUNDARY  ɪ m ɐ WORD_BOUNDARY t iː f ɐ WORD_BOUNDARY
e s WORD_BOUNDARY f l i e g t WORD_BOUNDARY i m m e r WORD_BOUNDARY t i e f e r WORD_BOUNDARY