present continous 

Positive                                           

I'm playing
You're playing
He/she/it is playing

We/you/they are playing

Negative

I'm not playing
You aren't playing
He/She/It isn't playing

We/You/They aren't playing

Questions

Am I playing...?
Are You playing...?
Is he/she/it playing...?

are we/you/they playing...?

Short answers

Yes, I am
Yes, he/she/it is
Yes, we/you/they are

No, I am not
No, he/she/it isn't
No, we/you/they aren't

Time expressions

Now
This week
Today

At the moment...