as far as
作为介词是 就 ...而言,至于 的意思
例句：This is a book,which I dare say,is unequaled as far as translation practice is concerned.
就翻译训练而言我认为这是一本无出其右的好书
而作为连词是 到 ...程度
例句：As far as I know,he is kind.
就我所知,他人不错
as far as 后没有接介词to的用法 因为第二个as本身就作为连词和介词的词性
但有一个动词短语 go so/as far as to… 竟然到...地步
后面可以加名词
例句：Personally,I wouldn't go so far as to say that.
就我个人而言,我还不至于说那个