Leo's topic

I am willing to do punctuation in presentation. Becasue I have been to write many times, one of the biggest problems in my gramma is comma using. I am usually glad to write a long sentence, but sometimes I cannot make my sentence to be clear since I use comma unsuitably. So that, in this presentation I will do comma using to explain how important the comma is. My partner in presentation is Hanqiong Chen.
We make a powerpoint and focuse on four different area.
Three Basic Comma Rules

Three Main Comma Rules

Three Other Comma Rules

Unnecessary Commas