I have a series of useful phrases from Jukuu, that assist learners in developing conversations and learning new word/phrases. Which of these would be more appropriate for talking to a stranger? Would I choose a different phrase for a doctor or for a family member? If other phrases are more appropriate please let me know.
謝謝!
Will you speak a little more slowly?
请你说得再慢一点,好吗?
I am sorry, sir. Can you repeat that more slowly, please?
对不起,请你再说慢点。
I'm sorry, can you repeat that.
对不起,您能重复一下吗?
A: Can you repeat that, please?
甲:请您再说一遍好吗?
Sorry, I don't understand.
对不起,我没明白。
EDIT: To clarify this question. Please note that I am looking for the situation where one would use one phrase rather than another.
Examples might be:
Use phrase x when talking to family members (etc.)