There will be a transfer fee changed either to the recipient or the sender.疑问:1. changed应该是被动语态"被收取"的意思, 为什么前面没有be动词?2. either后面为什么要加to?
changed either to the recipient or the sender 是过去分词短语作后置定语,修饰 a transfer fee :其它搭配:(1)changed to (2)either ... or