逻辑的思路，但是有个疑点

crack25

The results of the company’s cost- cutting measures are evident in its profits, which increased five percent during the first three months of this year after it fell over the last two years.
A. which increased five percent during the first three months of this year after it fell
B. which had increased five percent during the first three months of this year after it had fallen
C. which have increased five percent during the first three months of this year after falling
D. with a five percent increase during the first three months of this year after falling
E. with a five percent increase during the first three months of this year after having fallen

请教这个如果从语言含义上推测为什么是C的failing done不是having done。
OKAY，我知道E错在10with不忠实原文，after having没有主语，但是谁能给我说通一下为什么答案C用的是failing这个不合逻辑，应该是having fallen不是吗？

kikisunflower

prep语法笔记里面前辈总结的，粘给你

AlienX: after having done something是不可能对的
1)    after已表示the sequence of events.  没有必要用having done来表示前后
2)    可是after someone/something has/have done something是acceptable; 如果变成after someone/something did something也可以

kikisunflower

alienX说的after doing结构里，after是介词
after sb has done结构里，after是连词