Is she walking?
No, she isn't walking.
What is he doing?
He is watching youtube
What is he doing?
He is reading a book.
Is she playing guitar?
No, she isn't playing guitar.
What is he doing?
He is drinking coffee.
What are they doing?
They are talking.
What is she doing?
She is running
Are they cleaning the house?
yes, they are cleaning the house.
Is he studying?
Yes, he is studying