Discussion in 'English Only' started by HOUYI, Oct 26, 2010.
When I greet to a stranger,can I say,"Hi,Sir/Madam."
Will it be considered as impolite?
Yes. They'd expect you to be able to tell their gender just by looking.
OK, I'm being flippant, so I'll also answer the question I think you're asking.
"Hi" is informal, whilst "Sir" or "Madam" is formal. No-one will be offended if you put the two together, but it will sound wrong. If you're going to use "Sir" or "Madam", I would suggest you use "Hello" with it instead. If you're starting a letter or email, and don't know exactly who will be reading it, then "Dear Sir/Madam" would not be offensive.
Thank you for the explanation!
Separate names with a comma.