Present (BE + -ING)

Have a look at this picture:

Examples:

He/She/It is playing football.
We are playing football.
You are playing football.
They are playing football.

Negation: I am not playing football, you are not playing football...

Question: Am

I play

ing football? Are you playing football? Is he playing football? ...

Answers:

Are they playing football?

Long answers:	Yes, they're playing football.	No, they aren't playing football.
Short answers:	Yes, they are.	No, they aren't.