请问一下过去分词短语做后置定语的时候，怎么区分他是表示被动还是表示完成的含义呢？

Question

麻烦高手们帮忙造下句子，最好能转换成定语从句的形式，谢谢了！！！！！！30分酬谢！

Answer 1

表被动的就是只有一个过去分词做定语
如，he found the book bought buy his mother yesterday
改成定语从句he found the book which was bought buy his mother yesterday

表完成的是having+done,是做状语，不能做定语
如，he gave me a pound having received the letter

Answer 2

做定语表被动只用过去分词，且用在关系词之后。eg：The poor boy is playing with a football which broken down by his mother。 完成式也可,但做定语不行. eg:The football is broken down by his mother,whichThe poor boy is playing with。