非限制性定语从句与独立主格结构的区别The factory produced many famous cars every year,none of them shopped to foreign countries.这一句中为什么不能用none of which呢?是不是说非限制性定语从句后面一定要有谓语动词，而独立主格结构后面没有谓语动词呢？这个可以作为判断限制性定语从句与独立主格结构的依据吗
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非限制性定语从句：
The factory produced many famous cars every year,none of (which were )shopped to foreign countries
独立主格结The factory produced many famous cars every year,none of (them )shopped to foreign countries.
看到区别了吧.