谁能告诉我定语从句和同位语从句的区别,在线等

同位语从句的标志是that. 如The goal that I become the boss can not be achieved. The goal就是I become the boss ,它们是平行的，去掉后者句子依然成立。
定语从句里不一定有that.有that的时候，that后面的内容是对that前面内容的修饰，去掉that后句意不完整，甚至错误。