同位语从句的引导词有哪些

同位语从句即重复说明同一个称谓或事件的从句，其引导词有:that,whether,what,which,who,when,wherewhy,how等，常放在fact,news,idea,turth,hope,problem,information,wish,promise,answer,evidence,report,explanation,suggestion,conclusion等抽象名词后面。