用名词性物主代词的主格和宾格造句 造八句（my和mine）一组（our和ours）一组.

首先楼主搞清楚概念,人称代词I you he she it 这些词有宾格形式,根本不存在形容词性物主代词的主格宾格这种说法.
my 我的
mine=my+名词 例如my book=mine ,mine 一般是有上下语境时不用再重复使用名词时候适用的
our和ours同上
造句自己就可以了,注意代词和系动词搭配好就行了

Your car is bigger than mine.
I've got a nice basketball,but yours is better.
These things are for your daughter and those are for his.
I want to by an Ipod which is the same as hers.
This team claimed that the champion is its.
These soldiers saved the citizens lives but lost theirs.