Now I believe that the world is what you think it is "it is"做什么成分?这句话什么结构?我知道"that the world is what you think it is"是宾语从句,"what you think it is"是表语从句,而"it is"做什么成分?是什么从句啊?

问题描述:

Now I believe that the world is what you think it is "it is"做什么成分?
这句话什么结构?
我知道"that the world is what you think it is"是宾语从句,"what you think it is"是表语从句,而"it is"做什么成分?是什么从句啊?