What is the difference between How are you and How were you. Which is more appropriate to use?
"How were you?" is past tense. It implies that you are inquiring about how a person was at a previous point in time. One case I can think of where it would be used is when you were not able to attend someone's recital, etc. You would say "How did you do?" or "How were you?"
"How are you?" is present tense. It means that you are inquiring about how a person is at the current time. This is something that you typically hear people say to someone, after greeting them.