Present Continuous explanation

The Present Continuous

We use the present continuous to tell that something is happening at the moment we speak.
For example... Look around you. I can tell what's happening now. 

Your classmates are working on their iPads.
Mr.Mol is jumping on the trampoline.
Your neighbour is walking the dog.
 

You see? If you read the sentences you can see they are ongoing actions.
How do we create a sentence in the present continuous?

You take a Subject - I/You/He/We/They
You put a form of TO BE-  am/is/are
You take a Verb - play/walk/work/
You put a -ing behind the Verb - playing / walking / working