Question

一个英语问题，谢谢大家

Anyone who has handled a fossilized bone knows that it is usually not exactly like its modern counterpart ,the most obvious difference being that it is often much heavier.

我觉得这句话，到counterpart就结束了，请问后面的the most obvious difference being that it is often much heavier-----这做什么成分？
万分感激！

Answer 1

Anyone【 who has handled a fossilized bone定语从句】 knows that【 it is usually not exactly like its modern counterpart宾语从句】 ,【the most obvious difference being that it is often much heavier.同位语，这是前面宾语从句的同位语，也就是knows the most obious...,同位语是相当于前面说的意思的，这句话说得意思是最明显的区别，know后面是不同，所以这就是个同位语】

Answer 2

补语，后半句的谓语是being，动名词，非谓语形式，所以语法上是没有问题的。后半句补充说明前半句“一般人拿到一块石化的骨头会觉得跟正常的骨头感觉上有所不同”的不同中最明显的部分：“最明显的差别在于它通常会更重一些”

Answer 3

这是两句话。后面句话的主语是difference,形式主语是it.

Answer 4

独立主格结构，作状语

Answer 5

独立主格结构，称为状语