ah il s'est cassé
ah il être casser
co pro:sub v:aux part
ah il s'est cassé .
a WORD_BOUNDARY i l WORD_BOUNDARY s ɛ WORD_BOUNDARY k a s e WORD_BOUNDARY
a h WORD_BOUNDARY i l WORD_BOUNDARY s ' e s t WORD_BOUNDARY c a s s é WORD_BOUNDARY