"She has wine and milk."
Translation:Tá fíon agus bainne aici.
No this is grammatically incorrect. In the above sentence you have 2 conjugates here. It translates as SHE she has .......... The sí and the aicí both indicate a female person. In this structure of "someone has something" you use ----> Tá (noun) followed by agam(me),agat(you),aige(he),aicí(she),againn(we),agaibh(you all),acu(they).