Общий - Is his mother going to visit her friend tomorrow? Специальный- When is his mother going to visit her friend? Альтернативный - Is his mother going to visit her friend tomorrow or next week?
Is his mother going to visit her friend tomorrow?2.Is his mother going to visit her friend or her brother ? Why is his mother going to visit her friend?
Специальный- When is his mother going to visit her friend?
Альтернативный -
Is his mother going to visit her friend tomorrow or next week?