请问：过去分词后的名词做该过去分词的什么成分?宾语还是补语?
a)The man named Tom entered the room.
b)Appointed monitor,he was very glad.
(1)以上两句过去分词NAMED和APPOINTED后的名词TOM和MONITOR分别做过去分词的什么成分?都是宾语还是补语?
（2）appointed monitor在句中做状语我知道,但named Tom 在句中做定语还是补语?
（3）对于named Tom 和Appointed monitor,这算是两个过去分词短语吗?若是,在过去分词短语中,TOM做NAMED的宾语,MONITOR做APPOINTED 的宾语吗?
但是,named Tom 在所在句子中转化为句子,应当为who was named Tom,这句里Tom是主补,不再是宾语呀!
Appointed monitor在所在句子中转化为句子,应当为He was appointed monitor,这句里monitor也是主补,不再是宾语呀!
难道：过去分词后的名词在过去分词短语里做过去分词的宾语,但在由其改编成的句子里就变成主补了?
请高手详答,甚谢!