Writing & Punctuation – 10 Common Mistakes
http://divergenteye.blogspot.com/2014/02/grammar-check-infographic-10-common.html
A Site for Learners and Teachers of English as a Foreign or Second Language
http://divergenteye.blogspot.com/2014/02/grammar-check-infographic-10-common.html
SOURCE http://www.theguardian.com/science/2013/sep/30/10-grammar-rules-you-can-forget
part 1 Fanfare for the Comma Man part 2 The Most Comma Mistakes part 3 Some Comma Questions