So, how many do you need? I may be able to help, but not often. I'm told I'm a decent writer, so I am pretty sure I can help with most grammar, and some conventions. English is tricky, so don't be discouraged by any mistakes. Any and all rules will likely be broken at some point with this crazy tongue, so one definitive tip is to not assume that any rule is absolute. It's probably saved me a few points and such on my exams.