This is the document which was written by me.
可简化成==> This is the document written by me.
This is the man who wrote the document.
可简化成==> This is the man writing the document.
但我看过一种句型 不是Ving和P.P.的分词简化 是放“形容词”时的简化
This is the document eligible for the application.
原句应该是==> This is the document (which is) eligible for the application.
eligible是形容词 不是分词 此时which is可以省略吗?