as／so far as
1．to the extent of就…而论
As far as I know， the building will be completed at the end of the year．据我所知，这幢大楼将在年底完工。
As far as my knowledge is concerned， there is no such word in Chinese．据我所知，汉字中没有这样一个字。
So far as our desire is concerned，we don't want you to go there．就我们的愿望而言，我们不愿你到那儿去。
2．to the distance that 远至
They walked as far as the foot of the hill．他们一直走到山脚下。