Learn English – “overly confident” vs “over confident”

I have been using the following phrases but I am still not confident that they are grammatically correct and sound right:

"in regards with something"

"in regard to" is the right way here.

"with regards to something"

This is OK. Somehow I have the feeling that "with regard to" is more normal though. Paul Brians seems to back this up.

"regarding something"

This is OK, e.g. film title "Regarding Henry", etc.

I have also heard/read people using an arbitrary combination of the above (e.g. "in regards to"). Are those correct? If yes - are they equivalent or the usage depends on context?

It's much easier to answer your question if you put in some examples you've seen. Anyway I hope the above is enough.

Note that there is a completely different usage "regards to" as in "give my regards to old Broadway and tell them I will soon be there" etc.

She judged him wrong.

This means she decided he was wrong in something he did or said.

She judged him wrongly.

This means the error was hers.

Usually you would express that this way:

She judged him unfairly.

But wrongly works as well.