I heard the news (that a new student would join our class)这个句子我有疑问(that a new student would join our class)是补充说明THE news 为什么不是宾语补足语而是同位语呢?

I heard the news (that a new student would join our class)这个句子我有疑问(that a new student would join our class)是补充说明THE news 为什么不是宾语补足语而是同位语呢?
I heard the news (that a new student would join our class)这个句子我有疑问
(that a new student would join our class)是补充说明THE news 为什么不是宾语补足语而是同位语呢?

I heard the news (that a new student would join our class)这个句子我有疑问(that a new student would join our class)是补充说明THE news 为什么不是宾语补足语而是同位语呢?
同位语部分是个句子,就是同位语从句,这种用法比较"固定" 一、在复合句中用作同位语的从句叫同位语从句.它一般跟在某些名词后面,用以说明该名词表示的具体内容.I heard the news that our team had won．我听到了我们队获胜的消息.同位语从句 二、可以跟同位语从句的名词通常有news,idea,fact,promise,question,doubt,thought,hope,message,suggestion,words（消息）,possibility等.I’ve come from Mr wang with a message that he won’t be able to see you this afternoon． 我从王先生那里来,他让我告诉你他今天下午不能来看你了.三、英语中引导同位语从句的词通有连词 that,whether,连接副词 how,when,where等.（注：if,which 不能引导同位语从句.） He must answer the question whether he agrees to it or not.他必须回答他是否同意这样一个问题.四、有时同位语从句可以不紧跟在说明的名词后面,而被别的词隔开.The thought came to him that maybe the enemy had fled the city． 他突然想起可能敌人已经逃出城了.
有些东西 知道怎么用就可以的 不用深究 这是 大家经常用的习惯
二、可以跟同位语从句的名词通常有news,idea,fact,promise,question,doubt,thought,hope,message,suggestion,words（消息）,possibility等.
所以呢 记住这些词就好了