Is he playing with his younger brother in the garden now?
Who is playing with younger brother in the garden now?
What is he doing now? Where is he playing now?
Is he playing with his younger brother or sister in the garden now?
He is playing with his younger brother in the garden now, isn't he?
Has she visited Moscow?
Who has visited Moscow?
What Has she visited?
Has she visited Moscow or Smolensk?
She has visited Moscow, hasn't she?