Present Participle

Who's teaching english? My teacher Ariadna is english right now.
Where's Ariadna teaching? She's teaching in room 2.
What's she teaching? She's teaching english right now.
What are you teaching? I'm teaching english or I'm giving english classes.

Is Ariadna teaching enlish right now? Yes, she is.
Is Ariadna teaching mathematics right now? No, she isn't.
Are they dancing at the school? Yes, they are.
Is Ariadna running in the stadium? No, she isn't.
Is Luis watching T.V.? No, he isn't.
Is she playing soccer right now? No, she isn't.