The boy laughed at is my son.The boy who was laughed at is myson

题目

The boy laughed at is my son.The boy who was laughed at is myson

答案

问题是什么?两个句的区别吗?
两个都是定语从句,boy是先行词.
The boy( who was laughed at) is my son.
The boy is my son.是一个完整的句子,who was laughed at是对the boy的修饰.第一个句子只是省略了定语从句里的who was（主语、宾语）,这个在定语从句里挺常见的.