of后面加achieved 的ing形式。因为of是介词，所以要用动词的ing形式，因此achieve用他的ing形式，它要去e+ing，变成achieving。
achieve的动名词形式:
achieving
[əˈtʃi:vɪŋ]
v.取得( achieve的现在分词 )；获得；实现；成功
双语例句:
He accused Ford of being hell-bent on achieving its cuts by whatever means.
他指责福特公司不择手段一心要实现削减。
It is assumed that you are interested in achieving greater self-awareness.
假定大家都想变得更有自知之明。
