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Usually, "nor" follows "neither" in the same sentence, as in, "neither A nor B." Together, this neither/nor structure forms something known as a correlative pair. This means that the information one term introduces is connected or related to the information the other term introduces. The two terms can be applied when discussing actions or they can be used when listing nouns. For instance, "He neither listens to music nor plays it," or "Alex likes neither candy nor cake." "Neither" can also start a sentence. As an example, "Neither Sarah nor Jim can make it to the party on Saturday." On the other hand, either/or shows when something does occur. For example, "Alex wants either candy or cake." Notice how this sentence tells us that Alex likes both of these things and will eat either, where as the neither/nor sentence told us that Alex doesn't like both of them. Typically, the neither/nor structure is only used when drawing a negative connection between two objects or actions. You can use "nor" when talking about more than two ideas, though, but you need to repeat the word "nor" after each item in your list. Note that "neither" is only used once, no matter how many times you use "nor." Do not merely separate the items in your list by commas. Correct example: "The store had neither peanut butter nor jelly nor bread. Incorrect example: "The store had neither peanut butter, jelly, nor bread." Parallel structure, as it applies to the neither/nor form, means that both halves of phrase need to match each other in regards to the information being described. In other words, you cannot follow "neither" with a verb action and "nor" with a noun, or vice versa. Both most either introduce a verb or introduce a noun. Correct example: "We saw neither Gwen nor Eric during our trip. Correct example: "We neither saw Gwen nor spoke to Eric during our trip." Incorrect example: "We neither saw Gwen nor Eric during our trip." " The terms "either" and "neither" are used in similar manners, but "either" is positive while "neither" is negative. As such, you must pair the negative "neither" with the negative "nor" and the positive "either" with the positive "or." Just as "neither" is always paired with "nor," "either" is always paired with "or." Correct example: "Neither James nor Rebecca is interested in basketball." Correct example: "Either eat your vegetables or skip your dessert." Incorrect example: "I neither know the rules of the game or care to know." Incorrect example: "I will either go to the library or take a nap."
Follow "neither" with "nor" within a sentence. Use "nor" multiple times within a list. Keep your "neither" and "nor" parallel. Do not use "nor" with "either.