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either, neither

The quantifiers either and neither are a kind of determiner. We use them to talk about possible choices between two people or things.

When used as a determiner, either and neither must come before a singular countable noun.

either

Either is positive (+). It means "one OR the other" (of two).

  • A. Do you want to meet on Monday or Tuesday?
    B. Either day is good for me. (Monday is good for me. Tuesday is good for me.)
  • A. There are two keys here. Which will open the office?
    B. I believe either key works.

neither

Neither is negative (-). It means "not one AND not the other" (of two).

  • Neither team scored and the game was a draw. (Team A didn't score. Team B didn't score.)
  • Neither player was allowed to return to the game after the argument.
We can pronounce each of the words either and neither in two different ways:
either: /'i:ðə/ OR /'ʌɪðə/
neither: /'ni:ðə/ OR /'nʌɪðə/

Either pronunciation is acceptabe. Neither pronunciation is wrong.