1) It's really great
2)Can you give me a hand, David?
3)I think, the best place is in front of the window
4)What about the armchair?
5)Put on the wall opposite the sofa
6)what about the table?
This is John. This is his book. This is John's book.
These is my parents. This is their house. This is my parents' house.
This is Ron. This is his wand. This is Ron's wand.