名词或代词后的名词短语/不定式/从句，进一步解释说明其内容
e.g. Ms.Liu,our English teacher,is very welcomed among the students.
This is his purpose,to avoid being punished.
We are glad to hear the news that we have no homework today.
The fact that he didn′t said anything surprised us all.（同）
that是否作成分
The fact he said was a strong proof.（定）
同位语从句
同位语
名词或代词后的名词短语/不定式/从句，进一步解释说明其内容
e.g. Ms.Liu,our English teacher,is very welcomed among the students.
This is his purpose,to avoid being punished.
We are glad to hear the news that we have no homework today.
