一般说来，单个的过去分词应该是作前置定语的，下面是我搜集的例句：
This is one of our required subjects. 这是我们的必修课之一。
They rented a furnished apartment. 他们租了一套有家具的房间。
This part of the exam requires a written answer. 这部份考题需要书面作答。
Women are limited to the more poorly paid jobs. 女性仅限于做一些薪水较低的工作。
They sell a few pot plants, but they mainly sell cut flowers. 他们卖一些盆栽植物，但主要还是卖剪下的花。
但有时也可见到单个的过去分词用作后置定语，下面是我搜集的例句：
One bird was winged for every bird killed. 每打死一只鸟，同时有一只鸟被打伤翅膀。
The experience gained will be of great value to us. 取得的经验对我们将很有价值。
We couldn’t agree on any of the problems discussed. 我们未能就所讨论的任何问题达成协议。
Please fill in the form attached and send it to the address shown at your earliest convenience.  请填好所附表格，尽快寄往所寄地址。
请专家老师帮忙区别一下，谢谢！