Examples

In this sentence, the subject none means not any, so the plural verb sound is a safe choice. Too bad we can't say the same for any of those questionable eateries.

In this case, none means not one, so the correct verb is the singular form.

We don't know whether this sentence is about dogs or kindergartners, but we do know that in this case none is clearly referring to more than one thing or person, so we need to use the plural form of the verb.