il s'est envolé
il être envoler
pro:sub v:aux part
il s'est envolé .
i l WORD_BOUNDARY s ɛ t WORD_BOUNDARY ɑ̃ v o l e WORD_BOUNDARY
i l WORD_BOUNDARY s ' e s t WORD_BOUNDARY e n v o l é WORD_BOUNDARY . WORD_BOUNDARY