Both “nor do I” and “neither do I” are grammatically correct. They mean the same thing — you’re agreeing with something negative someone just said — but they aren’t used the same way. “Neither do I” is the natural, everyday choice for casual and professional conversation. “Nor do I” is more formal and shows up more often in writing, speeches, and sentences that already contain “nor.” Neither one is “more correct” than the other; the real difference is tone.
Quick Answer
If someone says something negative and you feel the same way, “Neither do I” is almost always the safer choice — it works in nearly any setting. Save “Nor do I” for formal writing or speech, or for continuing a sentence that started with a negative clause.
| Neither do I | Nor do I | |
|---|---|---|
| Tone | Everyday, neutral | Formal, literary |
| Common setting | Conversation, casual writing | Essays, speeches, professional writing |
| Example | “I didn’t sleep well.” “Neither did I.” | “The company did not respond, nor did it apologize.” |
Correct: I don’t eat shellfish. Neither do I. Also correct, more formal: I don’t eat shellfish. Nor do I. Incorrect: I don’t eat shellfish. I don’t neither.
What Does “Neither Do I” Mean?
“Neither do I” is a short way of agreeing with a negative statement. It means “I also do not [do that].” Instead of repeating the whole idea, English speakers flip the subject and verb around “neither” to show agreement without sounding repetitive.
Example: “I haven’t seen that movie.” “Neither have I.” This is simply a compact way of saying “I also haven’t seen that movie.”
What Does “Nor Do I” Mean?
“Nor do I” carries the same meaning as “neither do I” — agreement with a negative statement — but it leans more formal. It’s common in written English, especially when a sentence is building on a negative idea rather than just replying to one.
Example: “The report did not explain the delay, nor did it offer a timeline.” Here, “nor” links two negative ideas within a single sentence, which is one of its most natural uses.
“Nor Do I” vs. “Neither Do I”: Key Differences
The grammar behind both phrases is identical: auxiliary verb before subject (this is called inversion). What separates them is register and typical use.
- Formality: “Nor do I” sounds more formal, literary, or emphatic. “Neither do I” sounds neutral and conversational.
- Frequency: “Neither do I” is used far more often in everyday speech. “Nor do I” is less common outside of writing.
- Sentence role: “Nor” often continues a sentence that already contains a negative (“I don’t smoke, nor do I drink”). “Neither” usually starts a fresh, standalone reply.
They are interchangeable in meaning, so you won’t be misunderstood if you swap one for the other. Choosing between them is a style decision, not a grammar rule.
The Grammar Rule: Inversion with Negative Agreement
Sentence Structure (Neither/Nor + Auxiliary + Subject)
Both phrases follow the same pattern:
Neither / Nor + auxiliary verb + subject
The auxiliary verb has to match the verb form used in the original negative statement. If the first sentence uses “don’t,” your reply uses “do.” If it uses “can’t,” your reply uses “can.” This matching is where most learners slip up.
Example Sentences by Tense
| Original statement | Correct reply |
|---|---|
| I don’t like mornings. | Neither do I. / Nor do I. |
| She didn’t call back. | Neither did I. / Nor did I. |
| We haven’t finished yet. | Neither have I. / Nor have I. |
| He can’t drive stick shift. | Neither can I. / Nor can I. |
| They won’t be attending. | Neither will I. / Nor will I. |
When to Use “Neither Do I”
Reach for “neither do I” in ordinary conversation, casual writing, texts, and most workplace communication. It’s the default, low-risk choice.
Examples
- “I’m not a fan of horror movies.” “Neither am I.”
- Coworker: “I haven’t reviewed the contract yet.” You: “Neither have I — let’s split it this afternoon.”
- “My sister doesn’t drink coffee, and neither does my dad.”
When to Use “Nor Do I”
Use “nor do I” in formal writing, academic essays, speeches, or when your sentence is already building on a negative clause rather than replying to one.
Examples
- “The committee did not approve the budget, nor did it schedule a follow-up meeting.”
- In a formal letter: “I do not believe the terms are fair, nor do I intend to sign them as written.”
- “She never complained about the workload, nor did she ask for extra time.”
American vs. British English
Both American and British English accept “neither do I” and “nor do I,” and the grammar rule is identical on both sides of the Atlantic. The main difference is one of habit rather than rule: “neither do I” is the more common everyday response in both American and British conversation, while “nor do I” appears somewhat more often in British formal and literary writing than in American speech. Neither phrase is regional slang — both are standard English.
“Neither Do I” vs. “So Do I” (Negative vs. Positive Agreement)
This is a different pair from “nor do I” vs. “neither do I,” but it trips up many learners for the same reason: both use inversion, but one agrees with a positive statement and the other with a negative one.
- Use “so do I” to agree with something positive.
- Use “neither do I” (or “nor do I”) to agree with something negative.
Examples
- “I love hiking.” “So do I.” (positive agreement)
- “I don’t love hiking.” “Neither do I.” (negative agreement)
- Mixing them up sounds wrong: “I don’t love hiking.” “So do I.” incorrectly suggests you do love hiking.
Other Ways to Agree: “Me Neither,” “Either,” and More
“Neither do I” isn’t the only way to agree with a negative statement, and knowing the alternatives helps you sound more natural in different situations.
- “Me neither” is the informal, spoken equivalent of “neither do I.” It skips the inversion entirely and is common in casual conversation, but it’s generally avoided in formal writing.
- “[Subject] + negative verb + either” is another common pattern: “I don’t like waiting either” means the same as “Neither do I.”
- “Either” and “or” pair with affirmative structures (“either this or that”), while “neither” and “nor” pair with negative ones (“neither this nor that”). Keeping these two pairs separate matters — mixing them is one of the most common mistakes with this topic.
Examples
- “I can’t make it Friday.” “Me neither.”
- “I don’t check email on weekends.” “I don’t either.”
- Formal: “I do not support the proposal, nor do I support the revised budget.”
Pronunciation and Syllables
“Neither” has two syllables: nei-ther, with stress on the first syllable. Both /ˈniː.ðər/ (“NEE-ther”) and /ˈnaɪ.ðər/ (“NYE-ther”) are accepted pronunciations in English; “NEE-ther” is more common in American English, while “NYE-ther” is more common in British English, though both forms are used in each region.
“Nor” has one syllable, pronounced /nɔːr/ in American English and /nɔː/ in British English, rhyming with “for” or “door.”
Common Mistakes to Avoid
Using a Double Negative (“I Don’t Neither”)
Incorrect: I don’t like that plan neither. Correct: I don’t like that plan either. / Neither do I like that plan. Explanation: “Don’t” is already negative. Adding “neither” stacks a second negative onto the sentence, which is nonstandard in formal English. Use “either” at the end of an already-negative sentence, or use “neither” with inversion as a standalone reply.
Wrong Word Order (Forgetting Inversion)
Incorrect: Neither I do. Correct: Neither do I. Explanation: “Neither” and “nor” both require the auxiliary verb to come before the subject. Skipping this inversion is a very common error for learners translating directly from languages that don’t use this structure.
Using the Wrong Auxiliary Verb
Incorrect: He can’t swim. Neither do I. Correct: He can’t swim. Neither can I. Explanation: Your reply has to match the auxiliary verb in the original sentence — “can’t” calls for “can,” not “do.”
Mixing “Either/Or” with “Neither/Nor”
Incorrect: He speaks neither Spanish or Italian. Correct: He speaks neither Spanish nor Italian. Explanation: “Either” pairs with “or,” and “neither” pairs with “nor.” Combining one half of each pair creates a structure that doesn’t exist in standard English.
Real-Life Conversation Examples
Example 1: Casual Conversation
A: “Ugh, I really don’t want to go to the gym today.” B: “Me neither. Let’s just watch a movie instead.”
Example 2: Formal/Professional Setting
A: “The client hasn’t confirmed the shipping date.” B: “Neither has the warehouse team. I’ll follow up with both today.”
Example 3: Written English
“The proposal did not address the budget shortfall, nor did it outline a realistic timeline for implementation.”
Practice Exercises
- I don’t like mornings. ______ do I. (nor / so)
- She didn’t finish the report, ______ did she send an update. (nor / either)
- Choose the correct version: “I can’t attend the meeting, neither can I.” / “I can’t attend the meeting. Neither can Sam.”
- Fill in the blank: “He doesn’t eat meat, and ______ does his roommate.”
- Correct the mistake: “I don’t want dessert neither.”
- Fill in the blank: “We haven’t started the project. ______ has the design team.” (Neither / So)
- Choose the correct pairing: “She speaks neither French ______ German.” (or / nor)
- Rewrite formally: “I don’t agree with the plan. Me neither.” (turn the second sentence into a formal reply using “nor”)
Frequently Asked Questions
Is “nor do I” grammatically correct? Yes. “Nor do I” is fully grammatical and follows the same inversion rule as “neither do I.” It simply sounds more formal and appears more often in writing than in casual speech.
What’s the actual difference between “nor do I” and “neither do I”? The meaning is the same; the difference is formality and typical setting. “Neither do I” fits everyday conversation, while “nor do I” fits formal writing or sentences that continue an existing negative statement.
Can I use “neither do I” and “nor do I” interchangeably? In most cases, yes. Since they express the same idea, swapping one for the other won’t create a grammar error — it will just shift the tone slightly toward more casual or more formal.
Is “me neither” the same as “neither do I”? Yes, in meaning. “Me neither” is the informal, spoken version that skips the inversion structure. It works well in casual conversation but is generally avoided in formal writing.
Why is “I don’t neither” wrong? Because “don’t” and “neither” are both negative, using them together creates a double negative, which is considered nonstandard in formal English. Use “either” instead: “I don’t want that either.”
Do “neither” and “nor” always need inversion? When used as standalone replies to agree with a negative statement (“Neither do I,” “Nor do I”), yes. Inversion is what makes the agreement structure work.
Is “neither do I” formal or informal? It’s neutral — appropriate for both casual conversation and most professional communication. It reads as less formal than “nor do I” but is not considered too casual for workplace use.
How do I respond to a negative past-tense statement? Match the tense: “I didn’t go” gets the reply “Neither did I” or “Nor did I,” using “did” because the original sentence uses the past tense.
Can “nor” start a sentence on its own? It’s uncommon but possible in formal or literary writing, often for emphasis: “Nor was the delay ever explained.” In everyday use, “nor” more often connects to a negative clause that came before it.
What’s the difference between “either” and “neither”? “Either” is used with affirmative structures and pairs with “or” (“either coffee or tea”), while “neither” is used with negative structures and pairs with “nor” (“neither coffee nor tea”). “Either” also appears at the end of negative sentences (“I don’t want that either”).
Quick Recap
“Neither do I” and “nor do I” both mean “I feel the same way about something negative,” and both are grammatically correct. Reach for “neither do I” in everyday conversation and most writing; save “nor do I” for formal or literary contexts. Either way, remember the shared rule: the auxiliary verb comes before the subject, and it has to match the verb in the original statement.
Practice Answer Key
- Neither do I. (Matches the casual, standalone-reply pattern; “nor” would also work in a slightly more formal version.)
- Nor did she send an update. (Continues a sentence already containing a negative clause, which favors “nor.”)
- “I can’t attend the meeting. Neither can Sam.” is correct — the first option is missing sentence-ending punctuation before the reply, and reads as one run-on double statement rather than a reply.
- “He doesn’t eat meat, and neither does his roommate.”
- Correct version: “I don’t want dessert either.” (Removes the double negative.)
- “We haven’t started the project. Neither has the design team.”
- “She speaks neither French nor German.”
- Formal rewrite: “I do not agree with the plan, nor do I.”
