You use any in statements with negative meaning to indicate that no thing or person of a particular type exists, is present, or is involved in a situation.
I never make any big decisions...
I'm not making any promises...
You use any in questions and conditional clauses to ask whether there is some of a particular thing or some of a particular group of people, or to suggest that there might be.
Do you speak any foreign languages?...
Are there any ladies in the audience?...
You use any in positive statements when you are referring to someone or something of a particular kind that might exist, occur, or be involved in a situation, when their exact identity or nature is not important.
Any actor will tell you that it is easier to perform than to be themselves...
I'm prepared to take any advice...
You can also use any to emphasize a comparative adjective or adverb in a negative statement.
I can't see things getting any easier for graduates...
Anne's not getting any younger.
If you say that someone or something is not just any person or thing, you mean that they are special in some way.
Finzer is not just any East Coast businessman...
It's fashionable for young people to wear trainers, but not just any trainers.
If something does not happen or is not true any more or any longer, it has stopped happening or is no longer true.
I don't want to see her any more...
We felt we had no home any more, no family, nothing...