Questions & Answers about Dlaczego tyle pracujesz?
- Dlaczego = why
- tyle = so much / this much / that much
- pracujesz = you work / are working
So the sentence is literally Why so much do-you-work?, which natural English turns into Why do you work so much?
Polish does not use a helper verb like English do in questions such as Why do you work...?
In Polish, the verb itself is enough:
- pracujesz = you work / you are working
- Dlaczego pracujesz? = Why do you work? / Why are you working?
English needs do for this kind of question, but Polish does not.