It or that? (I know that - I know it)

What it the difference btw “it” and “that”?, like in:

He is a known-well teacher. I know that.
He is a known-well teacher. I know it.

If the same, why there is 2 words???
Thanks

Hi,

In your two examples you would have to use well known as the adjective

The first one and the use of that indicates that you know the statement is true.

The second one and the use of it, doesn’t really work because it would usually refer in this construction to a specific object as in:

[i]Do you know that church on the corner of the street?

Yes, I know it.[/i]

If you wanted to use ‘it’ in your second example, it would be better as:

He is a well known teacher. I know it’s true.

Alan

Dear Sir,

In this case:

He is a well known teacher. I know it’s true.

and:

He is a well known teacher. I know that’s true.

are the same meaning?

Thanks

Hi,

You can say both those, yes.

Alan