"Acestea sunt farfuriile bunicilor."
Translation:These are the plates of the grandparents.
The grandparents' plates is correct. I am American and what I was taught is that the plural possessive requires an apostrophe after the s. The singular possessive has an apostrophe just before the s (the grandmother's plates).
Yes, but also grandmothers :))
- o bunică, două bunici = a grandmother, two grandmothers
- un bunic, doi bunici = a grandfather, two grandfathers / a grandparent, two grandparents