例句一看就是定语从句啦,同位语从句的名词大多数是抽象的,例如fact,idea,suggestion等等啊,而定语从句中的先行词会是时间,地点,原因的词才会用where,when,why哦抽象名词有哪些news, fact, idea, belief, promise, decision, suggestion,truth,report这些是比较常见的。判断是那种从句，要看句子充分的。给你举个同位语从句的例子吧。Have you any idea where they are having a rehearsal? 虽然用了连词where,前面的名词却不是地点，所以先排除定语从句。