Grammatical Rules
Form
.
Sujeto Auxiliar (to be) Gerundio
I am talking, eating, learning, doing, going...
He, She, It is talking, eating, learning, doing, going...
You, We, They are talking, eating, learning, doing, going...
Structure
Affirmative Sentences
I'm talking
He's eating
![They're learning](http://josusierra.files.wordpress.com/2010/02/serc1.jpg%3Fw%3D500)
They're learning
PRESENT CONTINUOUS
Topic principal
Structure
Negative Sentences
![I'm not talking](http://4.bp.blogspot.com/_A-rzqghBXNs/TMg4iXFEzkI/AAAAAAAAAQE/tgRA29L0BZY/s1600/silencio.jpg)
I'm not talking
He's not [He isn't] eating