11. He asked Tom if he could give him a pen
12. He asked Mary if she could turn off the TV
13. She asked Binh if he could show her the way to Hoi An

He asked Tom if he could give him a pen 
He asked Marry if she could turn off the TV 
He asked Binh if he could show him the way to Hoi An 

11. He said: "Can you give me a pen, Tom."
→ He asked Tom could he give him a pen.
12. "Can you turn off the TV, Marry" I said
I asked Marry could I turn off the TV. 
13. She asked Binh:" Could you show me the way to Hoi An, please."
→ She asked Binh could have he show her the way to Hoi An.
không bt đúng không nha