[Grammar] if...(or not)

[jpeslab]

Hi,

Is this sentence below incorrect or unnatural?

The professor asked me if I brought my research paper or not.

Mostly, I have used "wheter" with "or not" but I'm wondering if I can use "if" instead of "whether".


Thanks in advance.

James

 

[Route21]

As an NES but not a teacher, the following work for me:

The professor asked me if I had brought my research paper with me.
The professor asked me whether or not I had brought my research paper [with me].
The professor asked me whether I had brought my research paper or not.

Regards
R21

PS:
I noticed a typo in your spelling of whether.
Whatever you do, beware of spelling "whether" as "wether"! ;-)
See:
wether - definition of wether by the Free Online Dictionary, Thesaurus and Encyclopedia.