1. We live in Surgut. We don't live on Surgut. Do we live in Surgut? Who lives in Surgut? What do we do in Surgut? Where do we live?
2. He is a lawyer. He isn't a lawyer. Is he a lawyer? Who is a lawyer? What does he do? Where does he work?
3. they are watching TV. They aren't watching TV. Are they watching TV? Who is watching TV? What are they doing? Where are they watching TV?