行为动作的对象或内容叫宾语.tell的对象是us,所以us是宾语.tell的内容是something about your school life,所以something about your school life也是宾语.us是间接宾语,something about your school life是直接宾语.两者合称双宾语.
something about your school life这个宾语的中心词是something.about yourschool life 是一个介词短语,是修饰something的.由于something是不定代词,凡是修饰名词或代词的成分都叫定语.所以about yourschool life是定语.