Some vs. any: the rule that actually works when you speak

"Would you like some more coffee?" the waitress asks at a Chicago diner. It's a question. It still uses some. The rule you memorized in school (some in affirmatives, any in questions and negatives) just failed on the most repeated sentence of an American breakfast.

The real choice depends on what you take for granted, not on the sentence type. Use some when you expect a "yes": offers, requests, and questions where you assume the thing exists. Use any when the question is genuinely open, or when a negation sits in front of it. And the second any, the "whichever one" any, lives precisely in affirmative sentences. The Cambridge grammar states it plainly: "Any is more common in questions but we can use some when we are expecting the answer to be 'yes'".

The school rule is a tendency, not a law#

Official teaching materials treat the school rule as an approximation. Cambridge calls some "most common" in affirmative clauses, and the British Council fields the question "some in positives and any in questions, right?" with "well, yes, often" before handing over the real criterion: "Sometimes we use some when we expect the answer to be 'yes'. We use any when we don't know what the answer will be."

Research has measured what that simplification leaves behind. A 2023 study of 72 C1-level students found that correct judgments cluster in the contexts textbooks teach, even at advanced levels: the split between taught and untaught contexts was decisive (χ²(1) = 65.97; p < 0.001). Its authors, Tom Rankin and Thomas Wagner, name where the trouble starts: "the typical pedagogical approach to any involves contrasting its use with some and characterising the choice as determined by clause type". That's the rule you were taught, and that's the rule that runs out.

Two identical questions that don't ask the same thing#

Have you got some water? and Have you got any water? are both correct, and they ask different things. Cambridge glosses the pair: with some you take for granted that there's water and you're asking someone to pass it. With any, the question stays open. You don't know whether there's water at all. Offers and requests take some for the same reason. Whoever offers coffee assumes there's coffee, and whoever asks for sugar expects to get it.

Wrong: Can I have any water? Correct: Can I have some water?

A request presupposes that the thing exists and that you'll get it, and some carries exactly that expectation. Real-life situation: you just finished a spinning class at a Houston gym and you walk up to the front desk with an empty bottle. Say any water and you sound like you doubt a gym would have water at all.

Formal semantics confirmed the pattern two decades ago. Robert van Rooy showed in the Journal of Semantics that "questions in which a negative answer is expected allow for NPIs, while questions which expect a positive answer license PPIs". Translated: questions that expect a "no" (or expect nothing at all) admit any, and questions that expect a "yes" call for some.

The "whichever one" any lives in affirmatives#

You can call me any time is an affirmative sentence with any, and it's flawless. This is the word's second job: free choice, the Spanish cualquiera. Cambridge defines it as "it does not matter which or what" and adds a detail worth gold to anyone who practices out loud. This any takes stress, while the weak any of questions slips by almost unheard.

The two uses are one word, not two homonyms. A foundational 70-page article in Linguistics and Philosophy (1993), by Nirit Kadmon and Fred Landman, unified them under a single mechanism: any widens the domain the sentence covers ("whichever there is", "not even one") instead of pointing at a concrete amount. So it fits when the sentence is about everything or nothing, and it clashes when you're talking about an amount that exists.

Your Spanish sets the trap (and hands you the fix)#

Spanish sets the trap because algo and nada don't split the work the way some and any do. Nada only survives next to a real negation: you say ¿Tienes algo de dinero?, never ¿Tienes nada de dinero?. So you open your mouth in English, you translate algo, out comes some, and the open question wanted any. A study with 47 Spanish-speaking learners by Eloi Puig-Mayenco and Heather Marsden documents the asymmetry: Spanish negative words demand genuine negation, while English any also works in questions and conditionals.

The reverse error runs the other way, because any is not negative on its own.

Wrong: Anything doesn't scare them. Correct: Nothing scares them.

English won't let any carry the negation by itself; the negative has to sit in the subject word. Real-life situation: on a video call with your Austin team, you describe a client who's fazed by nothing. You blurt out Anything doesn't scare them and get two seconds of puzzled silence. The sentence you wanted was Nothing scares them. Spanish flips the same sentence: Nada les asusta drops the no once the negative word comes first.

Your Spanish already runs this logic, just in other corners. The Royal Spanish Academy documents contexts that activate negative words with no no in sight: dudo que venga nadie, se fue sin decir nada. And the postponed alguno of sin posibilidad alguna shows up only in those same contexts. It's the structural cousin of English any. You're not learning a new logic. You're reassigning one you already use to two new words.

From rule to reflex#

Conversation gives you no time to check a table. When the waitress asks, you have half a second, and the choice only lands right if it's already automatic. Can you say "Can I have some water?" in one go, without routing through Spanish? That's the automaticity Tabla trains: you say the whole sentence out loud, against the clock, until choosing between some and any stops being a rule and turns into a reflex.

:::self-check Translate out loud, without thinking about the rule: "Puedes llamarme a cualquier hora" and "¿Me das algo de agua?"

The first is "You can call me any time": the free-choice any goes in an affirmative sentence and carries stress. The second is "Can I have some water?": a request takes for granted that there's water, so it asks with some, pronounced weak, /səm/. If you said any water, you applied the school rule when the expectation called for some. :::

Next time you're about to ask a question in English, decide first what you expect to hear. Expect a "yes"? Some. Genuinely don't know? Any. Doesn't matter which one? Any, with stress.

Try this today: record yourself saying "Would you like some coffee?", "Can I have some water?" and "Do you have any questions?", then listen back and check that your some sounds weak (/səm/), not "som".