Just ignore him/her ! Whatever he or she said doesn't belong to you unless you let them in (the words) ... the bright side? now you know which kind of person you are dealing with , and you'll be prepared to INGORE HIM/HER "better" next time ! =D HUM ! (this is my sound to ignore someone... =p I would "kill him" ... or her... with my indifference he he ) Good luck !!! ^^

when he or she finish i will say: did you finish?! so thank you !

Ask him why he said this And then I try to do understand that this is a mistake And as it did not respond gonna act with him in another way

It depends on the context. English "bad words" are far more complex than they seem at first glance. In general, they bring an emotional content to a sentence which often signifies anger or disdain but not always. For example, "You're the best f-cking* friend I've ever had!" is a very warm complement. That being said, using such words without insulting the sensibilities of others can be difficult even for native speakers. *Are there site rules concerning these words? So far I've seen everyone self censoring themselves with implications and alternative spellings. Do such taboos confuse the English learners? (The "-" represents a "u".) __________________________________________________________________ Here are some clips (which are comedy/satire aimed at native speakers) that might illustrate what I mean when I say that the usage of these words is "complex". As I said before, the meaning of words like f-ck is primarily emotional, and can elicit all sorts of emotional reactions: http://www.youtube.com/watch?v=26UA578yQ5g http://www.youtube.com/watch?v=D2Ka2nkIi2I

I would ask him/her to explain me the reason of such a behavior and words and then I would leave him/her alone.