Нужно перенести предложения из прямой речи в косвенную. Помогите пожалуйста.

8 Paul asked who would buy the tickets for the show.

9 The uncle asked his nephew not to play in the street, because it was very dangerous.

10Dick asked John where he had bought that suit.

11 The policeman asked if I had ever seen a ghost.

12 Mike's mother asked him to change his clothes.