il l'a vu chanter
il avoir vu chanter
pro:sub v:poss prep v
il l'a vu chanter ?
i l WORD_BOUNDARY l a WORD_BOUNDARY v y WORD_BOUNDARY ʃ ɑ̃ t e WORD_BOUNDARY
i l WORD_BOUNDARY l ' a WORD_BOUNDARY v u WORD_BOUNDARY c h a n t e r WORD_BOUNDARY