Are WE swimming?
No, we AREN'T swimming (we're learning English)
What is she doing?
She is doing homework / She's doing homework
Is she playing?
No, she isn't playing (she's doing homework)
Are they working?
No, they AREN'T working (they're playing)
What am I doing?
I am watching TV / I'm watching TV
What are the birds doing?
They are flying / They're flying
What are they doing? (go to school)
They are going to school / They're going to school
What are THEY doing?
They are playing / They're playing
Is HE climbing?
No, he isn't climbing (he's running)
What is he doing?
He is walking / He's walking
Are the birds walking?
No, they are not walking / They aren't walking (they're flying)
What IS HE doing?
He is climbing / He's climbing
What are THEY doing?
They are reading / They're reading
What are they doing?
They are eating dinner / They're eating dinner
Is he running?
No, he isn't running (he's walking)
What are they doing?
They are watching TV / They're watching TV
What IS HE doing? (smile)
He is smiling / He's smiling
What IS HE doing?
He is running / he's running
Is he smiling?
No, HE ISN'T smiling (he is crying)