1.同位于从句与前面名词是同位关系,即说明前面名词的内容 定语从句与前面名词是修饰与被修饰关系,即限定名词的范围 e.g The news that I have passed the exam is true. The news that he told me just now is true. 2.同位于中的that是连词,但a.不充当任何成分;b.没任何意义; c.不能省略 定语从句中的that是关系代词,除连接作用外,还可充当主、宾 等(作宾语时可省略) e.g.The idea that computers can recognize human voices surprises many people. The idea that he gave surprises many people 如何判断一从句是定语从句还是同位于从句? 用系动词be的形式去判断,如果是"表语从句"则是同位语从句,否则为定语从句.