The Rules - Poster Series

A poster concept revolving around my biggest pet peeve: mistakes in grammar. A series of multiple common mistakes in grammar intended to be a sold as limited edition prints. The money generated will be used to fund a gang run of the poster sets. These sets will then be distributed to local schools and educational facilities to better educate our youth.

The posters in full will be 24 X 36

Any suggestions of common mistakes that really grind your gears?