英语里的havebeendone和bedone还是有点分不清帮我看下这个句子hewastoldbyasmilingpolicemanthathisbicyclehadbeenfound.Fivedaysago,thepolicemantoldhim,thebicyclewaspickedupinasmallvillagefourhundredmi

　　英语里的havebeendone和bedone还是有点分不清帮我看下这个句子

　　hewastoldbyasmilingpolicemanthathisbicyclehadbeenfound.Fivedaysago,thepolicemantoldhim,thebicyclewaspickedupinasmallvillagefourhundredmilesaway.

　　这里前面为什么可以用hadbeenfound后面却用的是bedone（waspickedup）呢如果换成hadpickedup这句话成立吗