It'snoneofyoubusiness.//it's是主语与谓语,none代词在句子结构里算啥?句子中宾语是youbusiness?

Question

It's none of you business.//it's是主语与谓语,none代词在句子结构里算啥?句子中宾语是you business?

Answer 1

it 是主语,is none是系表结构作为谓语,of your business是后置定语,修饰none
表语其实就是系动词be后面的成分,但并不是所有be动词后都是表语,一般表语是对主语的进一步说明,我们看个例子吧：
He is going to the cinema.这里的going to 不是表语,而是跟is going构成了一个正在进行时.
The movie is exciting.这里exciting是对主语movie的进一步说明,所以就是表语.