私が把握している限りではの英語

to the best of my knowledge

as far as I know

That's all right, so far as I'm concerned.

That is all right, so far as I am concerned.

as far as I can see

In my submission ….

I know it for a certainty.

the degree to which something is self-evident

I understand clearly what you mean.

I knew it from the first―all along.

I get it, but

I know

I know that much.

be understanding of

As I develop an understanding of it....

I learned it

the ablity to understand

capable of being understood

That is the only thing that I know.

the condition of being aware

I know that much.

We shall see.

I'll just be myself.

You should know it,,,

I knew it

to know one's way about―know the ins and outs of a matter―know the ropes

know full well that…

I can understand it.

I understand

You understand, don't you?