boum il est tombé
boum il être tomber
co pro:sub v:aux part
boum il est tombé ?
b u m WORD_BOUNDARY i l WORD_BOUNDARY ɛ WORD_BOUNDARY t ɔ̃ b e WORD_BOUNDARY
b o u m WORD_BOUNDARY i l WORD_BOUNDARY e s t WORD_BOUNDARY t o m b é WORD_BOUNDARY