Here are good tips in english grammar:
The following points are a summary of the most common mistakes
I see, and the way to correct them. They are, however, by no means a
summary of ALL the English grammar mistakes. That list, I believe, is endless 🙂 So, let’s start with the English grammar tips:
Read more: http://www.really-learn-english.com/english-grammar-tips.html
I also came across with this article: http://grammarrule.blogspot.com/2006/12/english-grammar-rule-democrat-or.html
mandy33goh 