good..and i forgot to answer the other question last time..
mine means "我的something"(and the someting has been mentioned before)
for instance:
your country is Romania,mine is china(mine means "我的country" here)
your favourite food is ...,mine is .......(mine means "我的favourite food“)
By parity of reasoning
yours means "你的something” or"你们的something“
and so on..
you can infer the others words like "his" "hers" by yourself..
if you don't see these..tell me..O(∩_∩)O