Boban
1
1) Whole Greece has holded siege of one town for ten years.
Graecia tota decem annos unum oppidum obsedit.
2) Father has two sons and three daughters.
Patri est duos filios et tres filias.
3) In school library there are several (many) thousands of books.
In bibliotheca scholae plura millia librorum habes.
You need the nominative case there: Patri sunt duo filii et tres filiae.
3) In school library there are several (many) thousands of books.
In bibliotheca scholae plura millia librorum habes.
I think more literal would be to use “sunt” instead of “habes” (and I believe that “esse” when it means “exist” tends to the front of the sentence).
I just meant something like: In bibliotheca scholae sunt plura milia librorum.