I was the only one person wearing a costume.的语言结构

问题描述:

I was the only one person wearing a costume.的语言结构

这个没有什么特殊的结构吧,wearing这里是个非谓语动词,the only person 后面既可以接that(who) does 也可以接doing 做定语,但是说that doing 就明显不对了