分析如下:they 主语;were not系动词; taken表语; seriously副词做状语。they were not taken seriously:意思是:他们没有当真。
they were not taken seriously.他们没有被认真对待。是个被动语态的句子。句子结构是个主系表的结构: 主:they, 谓语were not, 表语: taken(形容词作表语)状语: seriously seriously是作they were not taken的状语。