Does the following sentence make sense? This doesn't seem be a grammar question.
Neither John nor I am having dinner together.
I'd appreciate your help.
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Sign up to join this communityDoes the following sentence make sense? This doesn't seem be a grammar question.
Neither John nor I am having dinner together.
I'd appreciate your help.
It doesn't make sense. 'Neither' is used about each one of two things considered individually, and 'together' is used about more than one thing, considered jointly. You could say "John and I are not having dinner together (or with each other)", or "Neither John nor I is dining with the other".
neither
determiner, pronoun, conjunction, adverbnot either of two things or people
Neither (Cambridge Dictionary)
together
adverbwith each other