nekojita 先輩 14 Jan 2009 1,660 443 100 21 Feb 2014 #2 When Xとする forms are used as modifiers, they are often in past tense. This is that vague form of とする which can be "to take as/set as/treat as/make..." 助詞を中心とする - to concentrate on particles/make particles the focus. 助詞を中心とした問題 question(s) which.... (etc)
When Xとする forms are used as modifiers, they are often in past tense. This is that vague form of とする which can be "to take as/set as/treat as/make..." 助詞を中心とする - to concentrate on particles/make particles the focus. 助詞を中心とした問題 question(s) which.... (etc)