il est allé se préparer
il être aller se préparer
pro:sub v:aux part pro:refl v
il est allé se préparer .
i l WORD_BOUNDARY ɛ t WORD_BOUNDARY a l e WORD_BOUNDARY s ə WORD_BOUNDARY p ʁ e p a ʁ e WORD_BOUNDARY
i l WORD_BOUNDARY e s t WORD_BOUNDARY a l l é WORD_BOUNDARY s e WORD_BOUNDARY p r é p a r e r WORD_BOUNDARY