it的名词性物主代词是its.
its：det.(指事物、动物或婴儿)它的，他的，她的
Have you any idea of its value?
你知道它的价值吗？
The car is in remarkably good condition for its age.
就车龄而论，这辆车的状况好极了。
There was discussion about the fire and its likely cause.
对那场火灾及其可能的起因进行了讨论。
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