主动句改被动句句子顺序的问题 That man tied the dog to the tree改为被动

问题描述:

主动句改被动句句子顺序的问题 That man tied the dog to the tree改为被动
the dog was tied to the tree by that man
the dog was tied by that man to the tree
请问两个句子哪个对呢?by引导的部分必须放最后吗?

通常会用第一个,有时甚至会省略施事者.但是不排除在特殊情况下,追求表达效果会用第二个.