Any problems in saying `good to know (about) that`?

Are there any problems in saying the following when responding to one answer in the comment?

good to know (about) that?

How do I refine that?

well to know that?

nice to know that?


(It’s/That’s) good to know that

is both grammatical and colloquial. It’s an ordinary cleft construction, representing

To know that is good

in which to know that is an infinitive verb phrase acting as a noun, the subject. The sentence naturally takes an adjective as the predicative complement, and you may use any other adjective which the situation calls for:

It’s nice to know that. / That’s nice to know. / To know that is nice.
It’s convenient to know that. / That’s convenient to know. / To know that is convenient.
It’s discouraging to know that. / That’s discouraging to know. / To know that is discouraging.

But adverbs are right out:

It’s nicely to know that. / That’s nicely to know. / To know that is nicely.
It’s discouragingly to know that. / That’s discouragingly to know. / To know that is discouragingly.
It’s conveniently to know that. / That’s conveniently to know. / To know that is conveniently.

Well is a special case. Until about three hundred years ago the use of well as an adjective was common, and it still lingers in such fossilized phrases as “It is just as well (that)” or “all will be well”. Outside those phrases, however, it is obsolete, or at least literary. It’s unlikely you’d hear anybody today say

?It’s well to know that. / ?That’s well to know. / ?To know that is well.

marks a usage as unacceptable
? marks a usage as only marginally acceptable

Source : Link , Question Author : HyperGroups , Answer Author : StoneyB on hiatus

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