Can some modify singular nouns? Can some modify singular nouns in affirmative sentences, negative sentences, or both?

Can some modify singular nouns? Can some modify singular nouns in affirmative sentences, negative sentences, or both?

First, let's introduce the usage of some
1. Some with uncountable nouns: some, some
There's some ice in the fridge. You left some money on the table
2. Some is used with plural countable nouns, usually three or more
If you put some pictures on the wall, the room will look brighter
3. Some with singular countable nouns: unknown or unascertained person, place, or thing
She won a competition in some newspaper or other
So the answer to your question is: some can modify singular nouns; affirmative and negative sentences have no rigid rules

Some is a noun followed by a singular number?

Someone (person, place...) The singular is followed by the singular
Some girl is waiting for you
he went to some city in in Eorope.

Some boy (singular form of countable noun)

When it comes to a certain thing