In my little time, teachers always taught us to say "How do you do?" for greeting, however when I grew up, I never hear people say "How do you do?" in movies and in daily life.....I just want to know anybody would use "How do you do?" for greeting now? is it an old school expression? Please advise.
I wouldn't use it as a greeting; it's for formal introductions.
I've never heard it during visits to America, nor in American TV or films. I would say that it's a particularly BrE expression.
As previously stated, it's not a greeting as such, but at formal parties or business meetings, when people meet for the first time, they are likely to shake hands and simply say "How do you do?" It doesn't require a response - it's almost a statement, rather than a question.
Is it impolite to start the conversation without replying when someone say to me "How do you do" ?
Can we reply with that statement "How do you do" or simply say thanks ?
Thank you !
Most people would probably just repeat "How do you do?" back to the other person then get on with the conversation. It's an odd question, because even though it means "How are you?", people very rarely say "Fine, thank you" in response.
"How do you do?" has become corrupted over time and has become simply, "Howdo".
This is used as a greeting in informal situations, but it's not a question - it's just another way to say, "Hello" or "Hi". I suspect that this is specific to BrE.
The usual response to "Howdo" is "Howdo"!
buggles (not a teacher)
In AmE, "How do you do?" is typically used as a greeting while shaking hands in a formal situation - a business meeting (one of those meetings where everyone involved is wearing suits and ties) or when greeting folks that you haven't previously met while standing in the receiving line at a wedding or funeral.
In less formal situations, "how do you do?" would sound very stilted and it is more appropriate to say something like "Nice to meet you" or "How's it going?" or "Hi, how are you?"