Please give me some sample sentences

[Mami Fuke]

What is the difference in usage and its meaning.
As far as,,,, As long as,,,,
As far as I am concerend,,, As long as I know,,,
Can '' as far as'' and ''as long as'' in some sentences be interchangeable ?

[Ann1977]

I'm a teacher, but not of English. English is my first language.

I don't think "as long as" can be used interchangeably with "as far as."

AS LONG AS

"As long as" suggests a duration in time
As long as I have known him, he has always been honest.
During the time I have known him, he has always been honest.

"As long as" also means "because" or "since"
As long as you're going to the store, pick me up a loaf of bread.
Since you're going to the store, pick me up a loaf of bread.

"As long as" also means "if" or "only if"
I can usually finish my homework as long as I start early.
I can usually finish my homework if I start early.

AS FAR AS

On the other hand, "as far as" means "to the degree" or "to the extent"
As far as I know, he has always been honest.
To the extent that I know, he has always been honest.

As far as I can predict, I will be able to finish this homework.
To the degree that I can predict, I will be able to finish this homework.

[Daruma]

Fantastic examples, Ann.

Merriam-Webster's Learner's Dictionary

as far as (someone) is concerned : in the opinion of (someone)
▪ As far as I'm concerned [=in my opinion], everything he says is a lie.
▪ As far as she's concerned, he is perfect.

as far as (something) is concerned : about (something) : with regard to (something)
▪ He has no worries as far as money is concerned. [=he has no worries about money]
▪ As far as the weather is concerned [=as for the weather], we've been having nothing but rain for the past week.