Aims of the study: Giving a general view on written English and punctuation with its definition, classification, function, role. Providing the basic rules of some typical types of punctuation such as period (or full stop), commas, colon, semicolon, question mark, and exclamation mark. | Graduation course of English language sector: A study on using some typical typers of punctuation properly in writen English and common mistake made by Vietnamese learners