When, where, how, why, what, could you tell me, can you tell me, do you know, isn't it, didn't they, etc. Discuss Wh questions, indirect questions, and tag questions.
Thank you for your help.
I am understand it.
But if someone suddenly ask me one of two question, maybe I will be confusing. Because, two sentence are very similar to me. So at least, the man will be waited five or ten seconds.