the crystal palace was built for the great Exhibition of 1851.Made of iron and glass,

题目

the crystal palace was built for the great Exhibition of 1851.Made of iron and glass,
it was different from other buildings.
请问made为什么可以在句首,这是什么语法,我记得是it was made of iron and glass.

答案

对,这句完整的句子可以这么写：
It was made of iron and glass,so it was different from other buildings.
句意：因为它是由铁和玻璃制成的,所以它与其他建筑物有所区别.
两个句子的主谓都是it was,因此前一句的主谓可以省略,变成过去分词作状语（方式状语或原因状语）