英语同位语，插入语，补语的区别，最好举例说明。

My name is Li Kang.I live in Shijiazhuang,(a city not from Beijing.)同位语 David plays football,as well as Jack,(if not better than him.)插入语 We elected Tom (Chairman of the meeting.)宾语补足语 Tom was elected (Chairman of the meeting.) 主语补足语