1. This is your ball. The ball is yours.

2. This is his wooden chessboard. The wooden chessboard is his.
3. This is her school badge. The badge is hers.
4. These are our black blazers. The black blazers are ours.
5. These are your school scarves . The school scarves are yours.
6. These are their school ties. The school ties are theirs. 

Verified answer

1.This is your ball. The ball is yours.

2. This is his chessboard. The chessboard is his.
3.  This is her badge. The badgw is hers.
4. These are our blazers. The blazers are ours.
5. These are your scarves . The scarves are yours.
6. These are their ties. The ties are theirs.