most of them能引導非限制定語從句嗎

most of them 不能引導非限制性定語從句

例句：The other day I went to the bookstore and bought some new books， most of them were expensive.

非限制性定語從句常表示補充説明，但這不是非限制性定語從句.這裏的most of them expensive是獨立主格結構作狀語，表補充説明。

又如：

All the stones are very heavy， one of them weighing over 3 tons. 所有的石頭都很重，其中有一塊重達三噸多。

例句：The buses， most of which were already full， were surrounded by an angry crowd.

most of...意為“......的大多數”，如果在逗號後添加and，則句子變成兩個並列的分句。目前來看，句子是主從複合句，most of which指代大多數公交車