Basic Punctuation Rules

We use punctuation to create sense, clarity and stress in sentences and we use punctuation marks to structure and organise our writing.

Sometimes we tend to use punctuation marks according Spanish punctuation rules and we forget that English has its own rules. 

Here it is a document with the basic punctuation rules used in English by the Writing Centre of Azusa Pacific University.

Basic Punctuation Rules

Also, Here it's a picture with a summary of the use of punctuation marks.