Either and neither organize a choice involving two people, things, actions, or possibilities. Either points to one or the other of the pair. Neither excludes both members of the pair. The words can act as determiners, pronouns, paired conjunctions, and, in particular constructions, adverbs.
What Do Either and Neither Mean?
Either means “one or the other” of two people or things[1][1]. It can stand before a noun or stand alone when the pair is already understood.
- “Either route will take us downtown.” The speaker accepts route A or route B.
- “Either will take us downtown.” The noun route is understood from context.
- “You may choose either of these two routes.” One member of the pair may be chosen.
The grammatical label is less important here than the sentence job. Before a noun, either limits the choice to one member of the pair. Standing alone, it replaces the understood noun phrase.
Neither means “not one and not the other,” or “not either”[1][1][2]. It rejects or excludes both members.
- “Neither route is open.” Route A is not open, and route B is not open.
- “Neither is open.” The two routes are understood from context.
- “Neither of these two routes is open.” Both alternatives fail the stated condition.
The paired conjunctions make the contrast visible. Either pairs with or to introduce alternatives, while neither pairs with nor to state that the same proposition is not true of either alternative[1][3].
- “We can either walk or take the bus.”
- “We can neither walk nor take the bus because both options are unavailable.”
- “Either Luis or Hana will present the report.”
- “Neither Luis nor Hana has seen the final report.”
Either also has an additive use after a negative statement. In “I do not eat meat, and I do not eat fish either,” either means “in addition” and continues the negative statement[1]. This is different from selecting one member of a pair.
How Do Either and Neither Differ?
The core contrast is one-of-two versus not-one-and-not-the-other[1][1][4]. Compare the same two options in several grammatical forms.
| Form | Either | Neither |
|---|---|---|
| Before a noun | “Either answer may be correct.” | “Neither answer is correct.” |
| Standing alone | “Either is acceptable.” | “Neither is acceptable.” |
| Paired conjunction | “Either call or write.” | “Neither call nor write.” |
| With a negative statement | “I do not want either option.” | “I want neither option.” |
| Additive response | “I do not want it either.” | “Neither do I.” |
Two different structures can communicate the same rejection of a pair. “I want neither option” and “I do not want either option” both reject option A and option B[5]. The placement of negation changes, but the practical outcome does not.
Compare these transformations:
- “Neither door is unlocked.” → “I cannot open either door.”
- “Neither proposal meets the budget.” → “We cannot accept either proposal.”
- “I chose neither dessert.” → “I did not choose either dessert.”
These are useful transformations, not a command to replace every sentence. The affirmative form with neither carries its own negative meaning. The form with either receives negation from not or another negative construction.
Keep paired conjunctions parallel:
- “You can either email the form or deliver the form.” Both alternatives are verb phrases.
- “The form is neither complete nor legible.” Both alternatives are adjectives.
- “We will meet either on Monday or on Tuesday.” Both alternatives are prepositional phrases.
Matching the grammatical shape of the two alternatives makes the relationship easier to read. It also prevents the paired words from appearing to connect unrelated pieces of the sentence.
Keep each pair together in the pattern taught in this lesson: use either … or and neither … nor. Also distinguish “I do not want either” from “I want neither.” Both sentences reject the two options, but only the first places the negative meaning in not.
It helps to translate each sentence into two simple tests. For “Either window opens,” ask whether window A may open and whether window B may open; each is an acceptable possibility. For “Neither window opens,” test the same proposition twice: window A does not open, and window B does not open. For “I cannot open either window,” the word cannot supplies the negative meaning, so either remains the correct partner.
The additive use requires a different test. In “Sam did not receive a ticket, and Lee did not receive one either,” the second clause adds Lee to an established negative fact. There is no hidden choice between Sam and Lee. Replacing either with neither would require a new structure, such as “Neither Sam nor Lee received a ticket.” Both sentences can describe the same outcome, but their grammatical organization differs.
When Should You Choose Between Either and Neither?
Choose by asking what happens to the two alternatives.
- If one alternative may be selected or accepted, use either: “Either appointment works for me.”
- If both alternatives are excluded, use neither: “Neither appointment works for me.”
- If the sentence already contains not and both options are rejected, use either: “I cannot attend either appointment.”
- To introduce two alternatives, use either … or: “We can meet either today or tomorrow.”
- To negate the same proposition for both alternatives, use neither … nor: “We can meet neither today nor tomorrow.”
- To add agreement after a negative statement, use the additive pattern with either: “I cannot attend, and Rosa cannot attend either.”
Do not decide from whether an option sounds good or bad. “Either problem could delay us” uses either even though both possibilities are undesirable, because either member could produce the result. “Neither solution is expensive” uses neither even though the result may be welcome, because the statement says “not expensive” about both solutions. The logical relationship, not the emotional value of the options, determines the word.
When revising a long sentence, first reduce it to option A and option B. Decide whether the sentence permits one, rejects both, or adds a second negative fact. Restore the details only after choosing the relationship. This method prevents nearby negative words from controlling the answer when they describe the options rather than negate the sentence.
Practice Items
Choose either, neither, or, or nor as needed.
- You may choose ___ seat; both are available.
- ___ seat is available, so we must stand.
- You can ___ call me ___ send a message.
- ___ the printer ___ the scanner is working.
- I did not recognize ___ person.
- Ava does not eat fish, and I do not eat it ___ .
- The key is ___ in the drawer ___ on the desk.
- The key is ___ in the drawer ___ on the desk; we checked both places.
Rewrite each sentence without changing its practical meaning.
- “I chose neither route.” Begin with “I did not …”
- “Neither answer is complete.” Begin with “I cannot accept …”
- Correct: “You may either wait nor return later.”
- Correct: “Neither Kim or Jo signed the form.”
Answer Key
- either
- neither
- either … or
- neither … nor
- either — the sentence already contains not
- either — additive use after a negative statement
- either … or
- neither … nor
- “I did not choose either route.”
- “I cannot accept either answer.”
- “You may either wait or return later.”
- “Neither Kim nor Jo signed the form.”
Some exercises allow a different sentence when the intended meaning changes. For example, “Either key works” accepts both keys as possible choices, while “Neither key works” rejects both. State the relationship first, then select the form that expresses it.