ThelastIheardofhimhewaslivinginGlasgow.
这句好好像有两个主语、谓语的样子,如果把Iheardofhim看成是定语从句的话修饰前面的thelast,那么主句为thelasthewaslivinginGlasgow.那thelast在主句中是什么成分?应该如何理解?