SOME AND ANY

The difference between some and any:

Generally, we use any in the same way as some: when we are thinking about a certain amount or number of something. Remember, usually both some and any can only be used with plural countable nouns or uncountable nouns, but not usually with singular countable nouns.

We usually use some with affirmative (positive) sentences and any with negatives and questions:

• She bought some tomatoes [positive sentence].
• She didn't buy any tomatoes [negative sentence].
• Did she buy any tomatoes [question]?

However, there are some exceptions to this.

1: Any can be used in a positive sentence to mean 'it's not important which one'. When we use any in this way, it's most often used with singular countable nouns:

• You can take any bus.
• Pass me any glass.
• Come over any Sunday.

2: Any can also be used in positive sentences that have a negative feeling, for example if they include never, hardly, without:

• She never eats any fruit.
• We hardly watch any television.
• Julia left the house without any money.

3: Some can be used in questions when we expect that the answer will be 'yes'. This is very common in offers and requests:

• Would you like some coffee?
• Do you want some sandwiches?
• Could you give me some help?
• Could you pass me some sugar?

Compare the following two sentences:

• Do you have any letters for me? [This is a real question. I don't know if you have any letters or not.]
• Do you have some letters for me? [I think you do, so I'm expecting that you will say 'yes'.]

(Fonte: https://www.perfect-english-grammar.com/some-and-any.html)