abroad确实是副词,但是,有些副词除了作状语外,还有一个功能,就是作介系词的宾语,如: He lives quite far away from here. He returned from abroad. He and his family moved to Zurich, from where he moved to Italy to go to university. here、abroad、where都是副词,但是它们在这里都作介系词from的宾语,希望我能帮助你解疑释惑。本回答被提问者采纳