[Grammar] "Case of" or "Case with"

[Anne59]

Hi everyone and Happy New Year,

My first question of 2015 is what is the difference between "case of" and "case with". My English friend gave me these two sentences as an example but I can't understand when I would use "of" or "with". Can anyone help me?

"This is a case of poor judgement."
&
"That is not the case with my brother."

Thanks!

 

[Matthew Wai]

"This is a case of poor judgement."

Here, 'a case' means 'an example of a particular situation', according to http://www.ldoceonline.com/dictionary/case_1

"That is not the case with my brother."

Here, 'the case' means 'the true situation', according to http://www.oxfordlearnersdictionaries.com/definition/english/case_1

Not a teacher.

 

[Raymott]

The relevant phrases are not "case of" and "case with". They are "of poor judgment" and "with my brother".
Consider: "This is a cup of wine."; "This is a cup with a handle." The difference between "cup of" and "cup with" is not the issue. You have to use whatever preposition naturally starts the prepositional phrase. The preposition is not tied to the preceding noun.