什么样的定语后置可以转换定语从句

我个人觉得所有定语都可以转换成定语从句,不管前置后置,还是哪一种后置
不过后置中,动词的非谓语形式构成的后置定语,转换成定语从句应该更有意义一点
I have something written in English。
=I have something that is written in English。
The meeting to solve the problems will come up soon。
=The meeting which is to solve the problems will come up soon。
前置的也可以
The nice blue T-shirt suits me a lot。
=The nice T-shirt,which is blue,suits me a lot。
没必要就是了,但是可以转换