老师说下面的句子有错：
There was one interesting thing happened in her first class.
错就错在句中将过去分词 happened 用作了后置定语。由于过去分词作后置定语表示被动，而这里的 happen 是个不及物动词，不能表示被动，所以错了。但我想：为何必须要把这个过去分词理解为“表被动”呢？为何不能把这个过去分词理解为“过去发生的动作”呢？
There was one interesting thing happened in her first class.
= There was one interesting thing that happened in her first class.
【参考译文】她第一节课就发生了件趣事。
【参考分析】这是正确的句子。只是happened 不是过去分词，而是定从的谓语动词：一个过去式。在 There be 结构中的定从，其主语可以被省略：
There is a table [ ] stands in the corner. 墙角放着一张桌子。
There must be something can be done. 肯定可以做些什么。
There is no one could be so sad. 没人能这样伤感。
【建议提示】作为中学生，最好用以下表达方法为佳：
There was one interesting thing that happened in her first class.
There was one interesting thing happening in her first class.
