	同位语	宾补	定语
词性	名词： Tom，a high school student，is a nice guy. He himself will come. We all love you. We all think it a pity that she didn’t come yesterday.	名词：She made me a fool. 形容词：I found the book interesting. 副词：Ifound her out. 介词：Ifound her in the classroom. 不定式：Iasked her to come. 现在分词：I found her reading a book. 过去分词：I found her gone. Ifound my bike fixed.	利词：People here are very nice. 形容词：The man next to me is Tom. 介词：The boy under the tree is Tom. 不定式：I have something to tell you. 现在分词：The girl sitting over there is Summer. 过去分词：The house built last year has been sold out.
顺序	可变可不变	不变序	变序
范围	不变	不变	变小

判断

同位语vs宾补

Ilove him Morty. 同位语
这里的Morty 是同位语，因为这里的Morty代指某完整的人，这个人是Morty.

His father named him Morty. 宾补
这里的Morty是宾补，是因为Morty在这里只代指了这个人的名字是什么，而无法代指他这个完整的人。

宾补VS后置定语

I saw the boy playing basketball. 宾补
The boy playing basketball is Tom. 后置定语

同位语VS后置定语

Tom，who is a student，studies hard. **非限制性定语
Tom，a student，studies hard.同位语**