as far as 的基本用法如下：

as far as + 名词/代词 + be + 形容词/过去分词

例如：

As far as I know, he is a good student.（据我所知，他是一个好学生。）

As far as she is concerned, the matter is closed.（就她而言，这件事已经结束了。）

as far as + 比较级 + be + 形容词/过去分词

例如：

As far as I am concerned, this is the best movie I have ever seen.（就我而言，这是我看过的最好的电影。）

As far as he is concerned, she is the most beautiful woman in the world.（就他而言，她是世界上最美丽的女人。）

as far as + 能愿动词 + be + 可能/愿意

例如：

As far as I can tell, he is innocent.（据我所知，他是无辜的。）

As far as she is willing to go, she will do anything to save her child.（就她愿意做的事情而言，她会做任何事情来拯救她的孩子。）

as far as 还可以用在 as far as … goes 结构中，意思是“就……而言”。例如：

As far as the food goes, it was delicious.（就食物而言，它很美味。）

As far as the service goes, it was excellent.（就服务而言，它很出色。）