what / they / do
What are they doing? They're playing the piano.
he / play the violin
Is he playing the violin? Yes, he is.
they / watch TV
Are they watching TV? No, they aren't.
she / read a book
Is she reading a book? No, she isn't.
the penguin / study
Is the penguin studying? No, he/she/it isn't.
Snoopy / dance
Is Snoopy dancing? Yes, he is.
she / run
Is she running? Yes, she is.
she / cry
Is she crying? Yes, she is.
they / eat
Are they eating? Yes, they are.
they / jump
Are they jumping? Yes, they are.
they / dance
Are they dancing? Yes, they are.
what / he / eat
What is he eating? He's eating popcorn.