None of can be followed by an uncountable noun or a plural noun. If it is followed by a plural noun, the verb can be singular (more formal) or plural. -None of us speaks French. -None of this cheese is any good. ;) oh and I add this here for your convenience: The question could be like this: -Should the nouns following either, neither, either of and neither of be plural? Either and neither are followed by singular nouns. -‘Can you come on Monday or Tuesday?’ ‘I’m afraid neither day is possible.’ -Come on Tuesday or Thursday. Either day is ok. Either of and neither of are followed by plural nouns, but the verbs should be singular. I don’t like either of them. Neither of my sisters is married.

‘None’ can be either singular or plural, depending upon the context. Example 'none of you'. If ‘you’ refers to multiple people, the verb would be plural; if ‘you’ refers to just one, the verb is singular. Other example 'None of the pie was eaten' = singular. 'None of the children were hungry' = plural. This is what Dictionary.com has to say about none: Usage note: Since none has the meanings “not one” and “not any,” some insist that it always be treated as a singular and be followed by a singular verb: .The rescue party searched for survivors, but none was found'. However, none has been used with both singular and plural verbs since the 9th century. When the sense is “not any persons or things” (as in the example above), the plural is more common: … none were found. Only when none is clearly intended to mean “not one” or “not any” is it followed by a singular verb: ‘Either’ and ‘neither’ are generally singular. There is an exception, however. If the word follows a choice between two or more alternatives, the verb should take the form of the closest alternative. Furthermore, if one alternative is singular and one is plural, it is preferred that you put the plural word last and use a plural verb. I’ll give some example: Either Mary or the other girls are going to lead the parade. Neither Buffy nor the vampires were going to give up.

"None of" takes a noun! "None" takes the verb. The same goes for "neither of" and "neither". None are good. None are bad. None are perfect. (use plural) None of them is any good. None of it is any good. (use singular) This is the same as using "all are good" and "all of it is good". It is exactly the same with the use of "neither". Neither are good. Neither of them is good.

"When 'none/neither/either' is followed by 'of+plural noun/pronoun', they are normally used with singular verbs in a formal style in British English. Plural verbs are common in informal British usage and generally in American English. " (from "Practical English Usage" published by Oxford University Press)