(April 23, 2015 at 10:54 am)Alex K Wrote: I consider my English grammar to be relatively good, but commas are my big weakness. I put them such that the text subjectively has a nice flow to it and, more importantly, that logically distinct parts are separated and there are no ambiguities in meaning. And then I pray that what I have done is close to correct.
In my case, I sometimes add commas to my online posts to help clarify meaning, even if they are not grammatically correct. Usually, I would rather be understood than be grammatically correct, though, most of the time, following the rules for proper grammar aides in communication and is best for both purposes.
Anyway, your comma usage is not going to show that you are not a native speaker of English. Just read the posts of many Americans, and you will see that your command of English is superior to what many of them manage in their posts.
"A wise man ... proportions his belief to the evidence."
— David Hume, An Enquiry Concerning Human Understanding, Section X, Part I.