Question

除非受到邀请,否则我不会去参加的英语翻译（要用过去分词作状语）

Answer 1

I won't take part unless I am invited.

unless引导的条件状语从句放在前面也可.

另外,看情况,take part也可改为take part in it或join in (it),或者go to attend it.