同位语从句与宾语从句区别很明显...
同位语从句是在名词后加上关系副词的,作进一步解释或叙述．
宾语从句是在没有宾语的前提下,加上关系副词,充当句子的宾语成分．
我来造个句子：
News came that Bush was criticized by his assistant.
News came 已经独立成句,而后面是补充说明News的
I wanted to tell you that Bush was criticized by his assistant.
I wanted to tell you sth.tell要求双宾语,所以缺一个宾语呀,that ...就充当宾语咯．
自己在体会下吧!