我曾近距离与他们接触过,但即便如此也恐怕未能在很大程度上加深我对他们的印象.
I have seen them at very close quarters（主句的主谓宾+状语‘at very close quarters')
which i am afraid has not greatly enhanced my opinion of them（定语从句）
which（主语） i am afraid （插入语）has not greatly enhanced （谓语）my opinion of them宾语）
请及时采纳,不懂继续问( 天天在线 ）