As far as I am concerned the matter is closed.
对我来说,事情已了结。
As far as I am concerned, error analysis is necessary in learning and teaching.
就我所知,错误分析法在学习和教学中也是很有必要的。
As far as I am concerned, it sounds like a good plan.
就我而言,这听上去是个很好的计划。
As far as I am concerned, your paper is fine as it is.
对我来说,你的文章(论文)这样写就可以了。
" As far as I am concerned, you can leave right now!"
“就我所关而言,你可以马上离开!”