what's the grammar of using either and neither? how do we use any of them and when?

Answer 1

"Either" is usually used with "or" ("either you do it or I do") and neither is used with "nor" ("neither you nor I have been chosen"). Either is positive, neither is negative. If you are expressing a positive thing, then you use "either" and if your sentence has a negative meaning, "neither" is the word to opt for.

I said that "either" usually used with "or". This is because there is a different way of using either, when you place it at the end of the sentence. "I don't like him either." This is in response to something which another person has just said, to which one is agreeing. I think it is the fact that one is agreeing, i.e. being positive, which makes it "either" rather than "neither".

Answer 2

"Either A or B":
(1) A is true.
(2) B is true.
(3) A and B are true.

"Neither A nor B":
A is not true AND B is not true. It is the exact and exclusive opposite possibility of "either A or B".


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