Am I correct about this aspect of what usage I can make of some?

Question

You can use some as "being of an indefinite number or quantity" only when the noun is in plural or is a uncountable noun and it always doesn't mean "being of an indefinite number or quantity" when the noun it modifies is in singular?

Answer 1

If I read that as a definition it would confuse me even though there may be 'some' truth in it.

'Some' examples would illustrate what you are trying to say.

Answer 2

test  

Answer 3

When you say some as in "being of an indefinite number or quantity," your noun must be in plural or be an uncountable noun indeed.

You can't say: Some day, I feel very bad because I didn't sleep very well.