<p>Do not ask any professor, LOR writer or not, to edit your SOP. I would be ticked off if a student asked me to do that, and I would question that student’s ability to pursue the independent work required of a graduate student. Certainly, a LOR professor might offer some feedback after reading your SOP ("You might want to focus more on your research . . . " or "This last paragraph needs to be stronger. . . "), but most probably won’t say anything at all about it. Professors are not editors. </p>
<p>If you have major writing problems, then take your SOP to your career center or your writing center for help. Or ask some friends for feedback. But, really, if you are going to graduate school, you should be able to write a polished, error-free statement that expresses your credentials and ambitions. </p>
<p>Have more confidence in your abilities!</p>