Possible Duplicate:
None as plural indefinite pronoun
I was programming when it suddenly struck me that I did not know if "none" should be singular or plural.
Fore instance, should I write "none is yellow", or "none are yellow", if I know nothing more about what "none" refers to?
In this related question, it came out that in many instances "none" as a plural indefinite pronoun is completely acceptable. However, that didn't really teach me when to use it as singular or plural.
