on l'avait perdu
on avoir perdre
pro:sub v:aux part
on l'avait perdu .
ɔ̃ WORD_BOUNDARY l a v ɛ WORD_BOUNDARY p ɛ ʁ d y WORD_BOUNDARY
o n WORD_BOUNDARY l ' a v a i t WORD_BOUNDARY p e r d u WORD_BOUNDARY . WORD_BOUNDARY