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can you give me some explanation and examples for this ..." as to/for"
Comments  
He lead the show as to the manner born.
We were puzzled as to whether who had stolen the bike.(= It threw us into a complete tizzy)
As for your studies, you really have to put your head down, if you are going to pass your exams. (concerning)
InchoateknowledgeHe lead the show as to the manner born.
We were puzzled as to whether who had stolen the bike.(= It threw us into a complete tizzy)
As for your studies, you really have to put your head down, if you are going to pass your exams. (concerning)
Isn't the highlighted sentence weird? What about "if you want to pass your exam(s)"?

Do we really need the comma before "if"?
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Hi

No, it is correct that way.

"if you are going to pass" : for you to pass you have to study hard