To link a cause to a result, Turkish gives you two very different machines. One is the borrowed conjunction çünkü ("because"), which behaves almost exactly like English because — it comes after the result and introduces a full finite clause. The other is the native -DIK için construction, which packs the cause into a nominalized clause placed before the result. They mean the same thing but build the sentence in opposite orders, and choosing well is a big step toward natural Turkish.
çünkü: "because," after the main clause
çünkü (note the ü in both syllables) is the easy one for English speakers because it works just like because. You state the result first, then çünkü, then a complete, finite, fully conjugated reason clause.
Gelmedi çünkü hastaydı.
He didn't come because he was sick.
Geç kaldım çünkü trafik vardı.
I was late because there was traffic.
Pencereyi açtım çünkü içerisi çok sıcaktı.
I opened the window because it was very hot inside.
The clause after çünkü is a normal main-clause-shaped sentence: it has a tensed verb (hastaydı, vardı, sıcaktı), not a participle or a nominalization. That is the defining feature of çünkü — it is a coordinating-style link between two finite clauses, with the cause always second. This is exactly the English order, which is why it feels comfortable.
-DIK için: "because," before the main clause
The native way to say "because" doesn't use a conjunction at all. It nominalizes the cause with the participle -DIK (plus a personal possessive ending) and follows it with the postposition için. The whole thing means "because of the fact that …" and lands before the result. (You can read more about this postposition on için: Purpose, Cause, Benefit, and about nominalized clauses in general on Nominalized 'That'-Clauses.)
Hasta olduğu için gelmedi.
Because he was sick, he didn't come.
Yağmur yağdığı için ıslandık.
We got wet because it rained.
Çok yorgun olduğum için erken yattım.
Because I was very tired, I went to bed early.
Look at the structure: ol-duğu ("his being"), yağ-dığı ("its raining"), ol-duğum ("my being") carry a possessive ending that agrees with the subject of the cause, and için turns the whole nominalized chunk into a reason. There is no separate tensed verb in the cause clause — the tense lives only in the final result verb. This is the genuinely Turkish strategy, and it's the one that dominates writing and careful speech.
So one English sentence has two mirror-image Turkish translations:
| Strategy | Order | Example |
|---|---|---|
| çünkü (finite, borrowed) | result → cause | Gelmedi çünkü hastaydı. |
| -DIK için (nominalized, native) | cause → result | Hasta olduğu için gelmedi. |
Both are correct and both are common. çünkü feels more conversational and is great for tacking on an afterthought reason; -DIK için feels tighter and more integrated, and is preferred when the cause is the main point or in formal writing.
bu yüzden, o yüzden, bunun için: "so / therefore"
To go the other direction — cause first, then "so / therefore, result" — Turkish uses sentence connectors built on yüzden ("from the face/reason of") or için. The most common are bu yüzden and o yüzden ("for this/that reason → so, therefore") and bunun için ("for this → so"). These open the result clause and point back at a cause already stated.
Hava çok soğuktu, bu yüzden dışarı çıkmadık.
The weather was very cold, so we didn't go out.
Otobüsü kaçırdım, o yüzden taksiye bindim.
I missed the bus, so I took a taxi.
Sınavın yarın, bunun için bu akşam çalışman lazım.
Your exam is tomorrow, so you need to study this evening.
These are the natural way to render English so / therefore / that's why at the start of a result clause. In careful or academic writing you'll also meet dolayısıyla and bu nedenle ("consequently / for this reason," more formal); for the fuller inventory of cause-and-result linkers, see Cause and Result Connectives.
Putting the directions together
The same two facts — "it was cold" and "we stayed in" — can be linked four ways, depending on which idea you lead with and which machine you use:
Dışarı çıkmadık çünkü hava soğuktu.
We didn't go out because it was cold.
Hava soğuk olduğu için dışarı çıkmadık.
Because it was cold, we didn't go out.
Hava soğuktu, bu yüzden dışarı çıkmadık.
It was cold, so we didn't go out.
Mastering all three connectors — çünkü, -DIK için, bu yüzden — lets you put the emphasis exactly where you want it.
Common mistakes
❌ Çünkü hastaydı, gelmedi.
Incorrect — çünkü cannot lead the sentence like an English 'because'-clause.
✅ Gelmedi çünkü hastaydı.
He didn't come because he was sick.
The number-one error: copying English word order. Because he was sick, he didn't come tempts you to start with çünkü, but in Turkish that front slot belongs to the native -DIK için construction (Hasta olduğu için gelmedi), not to çünkü.
❌ Geç kaldım çünkü trafik olduğu için.
Incorrect — don't stack çünkü with -DIK için; pick one.
✅ Geç kaldım çünkü trafik vardı.
I was late because there was traffic.
Don't double up the two "because" machines in one clause. After çünkü you want a plain finite reason (trafik vardı), not another nominalized için-clause.
❌ Hava soğuktu çünkü dışarı çıkmadık.
Incorrect — this reverses cause and result: 'It was cold because we didn't go out.'
✅ Hava soğuktu, bu yüzden dışarı çıkmadık.
It was cold, so we didn't go out.
When the cause comes first and the result second, you need bu yüzden ("so"), not çünkü ("because"). Using çünkü here flips the logic upside down.
❌ Gelmedi cünkü hastaydı.
Incorrect — spelled with c instead of ç, and missing the ü.
✅ Gelmedi çünkü hastaydı.
He didn't come because he was sick.
Key takeaways
- çünkü = "because," placed after the result and followed by a full finite clause — just like English: Gelmedi çünkü hastaydı.
- Native -DIK için = "because," placed before the result with a nominalized cause: Hasta olduğu için gelmedi. Same meaning, opposite order.
- bu yüzden / o yüzden / bunun için = "so / therefore," opening the result clause when the cause came first.
- Never lead a sentence with çünkü, never stack çünkü with için, and don't swap "because" for "so."
- Mind the ü: çünkü, bu yüzden.
Now practice Turkish
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Start learning Turkish→Related Topics
- için: Purpose, Cause, BenefitA2 — One postposition that covers English 'for', 'in order to', and 'because' — and how the complement type picks the meaning.
- Conjunctions vs Native SuffixationA2 — Why most Turkish conjunctions are borrowed words for a written style, while native Turkish links clauses with converbs instead.
- Nominalized 'That'-ClausesB1 — How Turkish renders English 'that'-complements with -DIK (factual) or -(y)AcAK (future) plus a possessive and case, with the embedded subject in the genitive.
- Cause and Result ConnectivesB1 — Choosing the right cause/result link in Turkish — preposed -DIğI için 'because', postposed çünkü 'because', and the result connectives bu yüzden / bu nedenle / dolayısıyla 'therefore' — and how each one sets the register.