si il est derrière
si il être derrière
adv pro:sub v:aux n
si il est derrière .
s i WORD_BOUNDARY i l WORD_BOUNDARY ɛ WORD_BOUNDARY d ɛ ʁ j ɛ ʁ WORD_BOUNDARY
s i WORD_BOUNDARY i l WORD_BOUNDARY e s t WORD_BOUNDARY d e r r i è r e WORD_BOUNDARY