it用作人称代词，通常指人以外的生物和事务，无阴阳之分
There is a car near the building. It is my neighbor's.<br>楼旁有辆小汽车，它是我邻居的。
Mr Zhang wrote a novel. It is about the miserable life of a yong woman.<br>张先生写了一部小说，它是关于一个年轻妇女悲惨生活的。
it有时可用来代替小孩（child）和婴儿（baby）
The child smiled when it saw its mother.<br>小孩看到母亲就笑了。
