Thank you for checking my question.
I found this sentence.
The beach was covered with a beautiful white sand.
I don’t think this sentence needs “a” because “beautiful white sand” means substance (or material) in general here.
“Sand” has the modification “beautiful white,” but in this case, the writer doesn’t mean a specific thing that has a boundary, I guess.
Also, the writer doesn’t use “a beautiful white sand” as a type of sand because this sentence has “covered with.” So, I think a noun that means general substance/material should be after “with.”
I don’t know the nuance of “a beautiful white sand” in this sentence.
Littleshiro I don’t think this sentence needs “a” because “beautiful white sand” means substance (or material) in general here. Correct. ” I don't see any contradiction between the use of "a" to mean a type and the use of "covered with".
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LittleshiroI don’t think this sentence needs “a” because “beautiful white sand” means substance (or material) in general here.
Correct.
Littleshirothe writer doesn’t use “a beautiful white sand” as a type of sand because this sentence has “covered with.”
I don't see any contradiction between the use of "a" to mean