名词性物主代词用作主语尤其见于以下两种情况：
▲一是名词性物主代词所包含的名词概念在在特定的语境中已有体现。如：
Yours is too old. 你的太旧了。
Ours are on the desk. 我们的东西在书桌上。
Yours is twice as large as mine. 你的是我的两倍大。
My parents are poor and so are hers. 我的父母很穷，她的父母也一样。
▲二是名词性物主代词所包含的名词概念在后面已有体现。如：
Ours is a big family.= Our family is a big family. 我们家人口很多。
Hers is a lonely life.= Her life is a lonely life. 她的生活很寂寞。
更多例句：
Hers was the best test result. 她的考试成绩最好。
Hers is a manically full life. 她的生活忙得不可开交。
Hers was the suggestion I acted upon. 我是按照她的建议去做的。
Theirs are the children with very fair hair. 他们的孩子是那些长着满头金发的。
Ours is the middle house in that row of five. 那排房子共有5间，我们的房子在中间。
Mine was a conventional family upbringing. 我接受的是传统的家庭教育。
Hers was a classic tale of rags to riches. 她的经历是从赤贫到富有的一个典型例子。
Hers is the kind of voice that excels at vocal gymnastics. 她的嗓音擅长演绎有难度的歌曲。
Hers is a moving and ultimately triumphant story. 她的事迹是一个感人肺腑的、最终获得成功的故事。