求助PREP 07 SC 32

having done 可以做非限定性修饰，不能做限定性修饰。
夸克的语法大全里面明确写出 having done 做限定性修饰是错误的：
The perfective aspect cannot usually be expressed in the finite clause:
wrong: The man having won the race is my brother.
correct: The man who has won the race is my brother.

可以做非限制修饰，如下：
Neuroscientists, having amassed a wealth of knowledge over the past twenty years about the brain and its
development from birth to adulthood, are now drawing solid conclusions about how the human brain
grows and how babies acquire language.

题目来自prep08。

关于but到底怎么用，建议你自己在OG上搜索关于but的例句，but是个很常用的词，句子很多。

谢谢～！！我明白了have done的点，但是用这个点在这题中只能排除bc呀？
那but后面为什么不能加having呢？
谢谢！！

The Chicago and Calumet (Rivers originally flowed into the St. Lawrence by way of Lake Michigan, but having been redirected by constructing) canals so that the water now empties into the Mississippi by way of the Illinois River. (A) Rivers originally flowed into the St. Lawrence by way of Lake Michigan, but having been redirected by constructing (B) Rivers had originally flowed into the St. Lawrence by way of Lake Michigan, but they have been redirected by constructing (C) Rivers, which originally flowed into the St. Lawrence by way of Lake Michigan but have been redirected by the construction of (D) Rivers, originally flowing into the St. Lawrence by way of Lake Michigan, but having been redirected by the construction of (E) Rivers, originally flowing into the St. Lawrence by way of Lake Michigan, have been redirected through the construction of 选e 有人说n + having done  不可以当做限定性修饰    ABCD 很好排除 。。。啥意思？ 还有～语法笔记上写：But后面绝不能跟having. but可做连词，副词，不能做介词，后面不可能跟having这种形式哦，有的时候跟动词原形是因为省略了主语 所以。。but后面到底能加啥？我又迷惑了。。。