when he was set free after twenty years in *,he was amazed at the changes he found

问题描述:

when he was set free after twenty years in *,he was amazed at the changes he found
请问这句话的意思,并分析这个句子.

他在*呆了二十年,出狱后,他对周围的变化感到很惊奇.
when he was set free after twenty years in * 是表示时间的从句;
was set free:被释放 in *在*
he was amazed at the changes he found.是句子的主体部分.
was amazed at:对···感到惊奇.he found修饰the changes
就是这样!