Cheat Sheet: Common Errors with Either/Or and Neither/Nor

Even advanced learners get tripped up by these correlative conjunctions. Whether it’s a "double negative" or a "verb agreement" slip-up, these errors can cost you marks. Use this cheat sheet to spot and fix the four most common mistakes!


Error 1: The Mix-and-Match Trap

The most basic error is mixing the pairs. "Either" must always go with "Or," and "Neither" must always go with "Nor."

  • Wrong: Neither the teacher or the student was there.

  • Right: Neither the teacher nor the student was there.

  • Wrong: You can either have the cake nor the ice cream.

  • Right: You can either have the cake or the ice cream.

Pro Tip: Remember the 'N' rule. Neither needs Nor.


Error 2: The Subject-Verb Agreement Headache

When you have one singular subject and one plural subject, which verb do you use?

  • The Rule: The verb follows the subject closest to it (The Proximity Rule).

  • Wrong: Neither the boy nor his friends is coming.

  • Right: Neither the boy nor his friends are coming.

  • Wrong: Either the players or the coach are shouting.

  • Right: Either the players or the coach is shouting.


Error 3: The "Double Negative" Disaster

Since "Neither/Nor" is already negative, adding another negative word like "not" or "never" creates a grammatical mess.

  • Wrong: I do not want neither tea nor coffee.

  • Right: I want neither tea nor coffee.

  • Right: I do not want tea or coffee.


Error 4: "Neither of" vs. "Neither... Nor"

When "Neither" or "Either" is used with the word "of," the subject that follows is plural, but the verb remains singular.

  • Wrong: Neither of the books are interesting.

  • Right: Neither of the books is interesting. (Think: "Not one of the books is...")

  • Wrong: Either of the plans work for me.

  • Right: Either of the plans works for me.

    Quick Summary Table

    ConceptCorrect UsageQuick Check
    The PairEither... Or / Neither... NorDo the 'N's match?
    ProximityMatch verb to the nearest nounIs the last noun singular or plural?
    NegativesNo "not" with Neither/NorIs there a double negative?
    "Of" PhrasesAlways use a Singular verbIs it "Neither of..."? Use "Is/Has/Was."

    Final Revision Challenge

    Can you spot the error in this sentence?

    "Neither of the two candidates have submitted their applications either today nor yesterday."

    The Fix: 1. "Have" should be "has" (Neither of...). 2. "Either... nor" should be "either... or" or "neither... nor" (The pair is wrong).

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