新概念2中定语从句which做主语问题

题目

新概念2中定语从句which做主语问题
it is now known that many of these monster which have at times beenshi sighted are simply strange fish.
which指前面monster,说做主语不能省略,可句中monster主语,在加which做主语,2个主语?
the operation ,which lasted for over four hours ,proved to be very difficult because of the hard resin which covered the skin.
the hard resin which 中书上说which做主语,可the hard resin不就是主语吗?为什么还要which?

答案

monsters 是先行词,也就是整个句子的主语
而which 是定语从句的主语
你不能把整个句子的主语和从句的主语混为一谈
同理,第二个例句,整个句子的主语是the operation,hard resin是后面的状语从句的名词,是定定语从句的先行词,which是定语从句的主语,定语从句是用来修饰这个名词的