long as ,as/so far as ,as soon as ,as well as 的区别

so long as只要
You may eat anything,so long as you don't eat too much。
只要不吃得太多,你可以吃任何东西。as far as就。。。而言,至于,远到
As far as I am concerned,I'm not against your plan。
就我而言,我并不反对你的计划。
So far as就。。。说(到。。。的程度)
So far as English is concerned,it is not so difficult as you might think。
就英文而言,它并不像你所认为的那样难。