What are they doing?
They're watching a movie.
What are they doing?
They are inline-skating.
make a question: THEY - USE THE CELLPHONE
Are they using the cellphone?
What are they doing?
They're roller-skating.
What is he doing?
He is reading a book.
make an affirmative sentence: SHE - DO HOMEWORK
She is doing homework.
Is he playing online games?
Yes, he is.
question: YOU - PLAY TENNIS
Are you playing tennis?
What is he doing?
He's watching videos.
What are they doing?
They're dancing.
What is she doing?
She is sleeping.
make a negative sentence: I - NO - PLAY VOLLEYBALL
I'm not playing volleyball.
What is she doing?
She's playing volleyball.
What is she doing?
She's riding a bike.
What are you doing?
I'm listening to music.