there was an exceptionally interesting person (with whom)I dated 是定语从句,修饰 person,省略连接词with whom。有一个我交往过的非常有趣的人。I thought I had found someone special to share my life with 是宾语从句,to后面表目的,我想我找到了一个特别的人来分享我的生活。What is most important to sb 对某人来说最重要的是...... 。