Răspuns :
frunte-fruntea,fruntile,-forme articulate
frunte-o frunte,niste frunti,unei frunti-articol nehotarat
al,a,ai,ale fruntii-articol posesiv genitival
frunte-o frunte,niste frunti,unei frunti-articol nehotarat
al,a,ai,ale fruntii-articol posesiv genitival