请师兄师姐帮我回答一个英语问题：怎么区别同位语从句和定语从句？

同位语从句和定语从句很相似,但还是有区别的,区别主要在以下三方面:

1. 从词类上区别

同位语从句前面的名词只能是idea,fact,news,hope,belief,suggestion,proposal,word,thought,doubt,truth,possibility,promise,order等有一定内涵的名词?而定语从句的先行词可以是名词?代词?主句的一部分或是整个主句?
如:The possibility that the majority of the labour force will work at home is often discussed.人们经常讨论大多数劳动力将会在家里工作的可能性?(同位语从句)

We are not looking into the question whether he is worth trusting. 我们正在调查的问题不是他是否值得信赖的问题?(同位语从句)

Word came that he had been abroad. 据说他已经出国了?(同位语从句)

Our team has won the game, which made us very happy. 我们的队赢了,这让我们很高兴?(定语从句)

The doctor whom you are looking for is in the room. 你找的那位医生在房间里面?(定语从句)

His mother did all she could to help him with his study. 他妈妈尽她的最大努力帮助他的学习?(定语从句,代词all作先行词?)

2. 从性质上区别

定语从句是从句对其先行词的修饰或限制,属于形容词性从句的范畴;而同位语从句是从句对前面抽象名词的进一步的说明和解释,属于名词性从句的范畴?如:

The news that our team has won the game was true. 我们队赢了那场比赛的消息是真的?(同位语从句,