English collapses an enormous amount of comparison into a single word, as: as fast as, as big as, as much as. Polish does not. It splits comparison along a grammatical seam that English speakers cannot see: the correlative changes shape depending on whether you are comparing adjectives/adverbs/verbs (use the invariable tak… jak) or nouns (use the agreeing taki… jak). On top of that sit two more correlative families: the proportional im… tym ("the more… the more") and the result-clause tak… że / taki… że ("so… that"). This page maps all four so you stop flattening them into one English as.
Equality of degree: tak… jak (adverbs, adjectives, verbs)
To say two things are equal in some quality or extent, use the fixed pair tak… jak ("as… as"). Tak modifies an adjective, an adverb, or a verb, and jak introduces what you compare against. Tak is invariable — it never agrees with anything.
Biegnij tak szybko, jak potrafisz.
Run as fast as you can.
Ona jest tak miła jak jej siostra.
She's as nice as her sister.
Pracuję tak dużo jak ty.
I work as much as you do.
What comes after jak keeps the same case it would have as a full clause. In tak miła jak jej siostra, siostra is nominative because it is understood as the subject of an elided "is" — as her sister (is). This is the same principle that governs case after niż and od in comparatives: the standard of comparison keeps its underlying case.
The negative "not as… as" is nie tak… jak:
Dziś nie jest tak zimno jak wczoraj.
It's not as cold today as it was yesterday.
Equality with nouns: the agreeing taki… jak
Now the seam English speakers miss. When the thing being compared is anchored to a noun — "such a big house as", "a car as fast as" — Polish does not use tak but taki, and taki agrees in gender, number, and case with that noun. Taki is determiner-like (the same word as in taki ładny "so pretty"); see sam and taki.
Chcę taki sam telefon jak twój.
I want the same phone as yours.
Mam takie samo zdanie jak ty.
I have the same opinion as you.
To była taka piękna pogoda jak w lipcu.
The weather was as beautiful as in July.
In taki sam telefon the form is taki (masculine singular accusative, matching telefon); in takie samo zdanie it becomes takie (neuter, matching zdanie); after a feminine noun it would be taka. This is the parallel of the bardzo / taki split: just as bardzo (invariable) modifies adjectives while taki (agreeing) is felt with nouns, here tak is the adjective/adverb intensifier and taki is the nominal one. Learners who say tak telefon jak twój are applying the adverbial form to a noun — ungrammatical.
Inequality: comparatives with niż / od
For "more… than" you build the comparative of the adjective or adverb (see the comparative) and join the standard with niż + same case, or od + genitive. Both are correct; od + genitive is tighter and very common with a single noun, while niż is required before a full clause or a non-nominal phrase.
Jest wyższy ode mnie.
He's taller than me.
Ten film jest lepszy, niż się spodziewałem.
This film is better than I expected.
The choice between them has its own page: niż vs od.
Proportional comparison: im… tym ("the more… the more")
To say that one quantity rises with another — English "the more… the more" — Polish uses the fixed correlative im… tym, each followed by a comparative. There is no word for "the" here at all; the structure is purely im + comparative … tym + comparative.
Im więcej, tym lepiej.
The more, the better.
Im szybciej skończymy, tym wcześniej wyjdziemy.
The sooner we finish, the earlier we'll leave.
Im starszy, tym mądrzejszy.
The older (he gets), the wiser.
Im dłużej się uczę, tym więcej rozumiem.
The longer I study, the more I understand.
English speakers, hearing "the… the…", reach for an article and try to translate "the." There is nothing to translate: im and tym are the construction. Note also that both halves take a comparative form (więcej… lepiej, starszy… mądrzejszy), and the clause order is fixed — the im-clause comes first. This is a correlative conjunction pair; see correlative conjunctions.
Result clauses: tak… że and taki… że ("so… that")
The same tak / taki split reappears in degree-result clauses — "so X that Y." Use tak… że with adjectives, adverbs, and verbs, and the agreeing taki… że with nouns. The result clause is introduced by że ("that").
Tak się zmęczył, że zasnął przy stole.
He got so tired that he fell asleep at the table.
Było tak zimno, że zamarzła woda w rurach.
It was so cold that the water in the pipes froze.
To był taki dobry film, że obejrzałem go dwa razy.
It was such a good film that I watched it twice.
Mówiła z takim przejęciem, że wszyscy zamilkli.
She spoke with such emotion that everyone fell silent.
Again the form tracks the seam: tak zimno (intensifying an adverb) but taki dobry film / z takim przejęciem (anchored to nouns, agreeing — accusative taki with film, instrumental takim with przejęciem). The result clause itself is a cause-and-result clause and is independent of the choice between tak and taki.
Quick decision summary
| You want to say | Use | Example |
|---|---|---|
| "as [adj/adv] as" | tak … jak | tak szybko jak |
| "as [+noun] as / the same as" | taki/taka/takie … jak (agrees) | taki sam jak |
| "more … than" | comparative + niż / od | wyższy niż / od |
| "the more … the more" | im + comp … tym + comp | im więcej, tym lepiej |
| "so [adj/adv] that" | tak … że | tak zimno, że |
| "such [+noun] that" | taki/taka/takie … że (agrees) | taki dobry, że |
Common Mistakes
❌ Chcę tak telefon jak twój.
Incorrect — a noun (telefon) needs the agreeing taki, not the adverbial tak.
✅ Chcę taki telefon jak twój.
I want a phone like yours.
❌ Im więcej pracuję, im jestem zmęczony.
Incorrect — the second half must be tym, and it needs a comparative.
✅ Im więcej pracuję, tym bardziej jestem zmęczony.
The more I work, the more tired I get.
❌ Ona jest taka miła jak jej siostra.
Incorrect — modifying the adjective miła calls for invariable tak, not agreeing taka.
✅ Ona jest tak miła jak jej siostra.
She's as nice as her sister.
❌ Było tak zimno że woda zamarzła — bez że.
Incorrect — the result clause must be introduced by że (and a comma precedes it).
✅ Było tak zimno, że woda zamarzła.
It was so cold that the water froze.
❌ Bardziej więcej się uczę, tym więcej rozumiem.
Incorrect — the proportional frame is im… tym, not bardziej… tym.
✅ Im więcej się uczę, tym więcej rozumiem.
The more I study, the more I understand.
Key Takeaways
- The tak / taki split is the heart of Polish comparison: invariable tak for adjectives/adverbs/verbs, agreeing taki for nouns. It governs both "as… as" (…jak) and "so… that" (…że).
- "The more… the more" is the fixed correlative im + comparative … tym + comparative — no article, fixed order.
- After jak (and after niż), the standard of comparison keeps its underlying case.
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Start learning Polish→Related Topics
- The Comparative: -szy / bardziejA2 — How Polish forms 'bigger, taller, more interesting' — the synthetic -szy/-ejszy suffix with stem mutation, the analytic bardziej type, and the four high-frequency irregulars.
- Than: niż versus od + GenitiveB1 — Polish has two ways to say 'than' after a comparative — niż keeping the original case, or od forcing the genitive — and they are not freely interchangeable.
- Correlative and Paired Conjunctions: i…i, ani…ani, czy…czyB2 — The two-part conjunctions of Polish — both…and, neither…nor, either…or, not only…but also, the…the — and why ani…ani keeps the verb's nie.
- Cause and Result: bo, ponieważ, dlatego, więcB1 — How Polish links a cause to its result — why bo can never start a sentence, where ponieważ and gdyż differ in register, and how dlatego points forward while bo points back.
- sam, taki, ów, niektóryB2 — The 'other' determiners — taki (such a / that kind), ów (that, formal), niektóry (some of a set), pewien (a certain), and sam (the very) — plus the crucial ten sam vs taki sam split that English collapses into a single 'the same'.
- niż vs od: Two Ways to Say 'Than'B1 — Polish has two ways to say 'than' in comparisons — niż followed by the same case as the first term, and od followed by the genitive — and they aren't interchangeable.