"If I do not know, I ask."

Translation: Když nevím, ptám se.

[cozarro]

What is the difference between "pokud" and "když"?

[VladaFu]

Similar as in "if" and "when".

[cricketswool]

How does one determine which one to use?

[VladaFu]

If is only conditional, when can also be temporal. The same holds for pokud and když.

[cricketswool]

Aha, much clearer! Thanks!

[uQPfHdnm]

"Pokud neznám, ptám se." - not accepted. Anything wrong with it?

[VladaFu]

Yes, neznám normally needs an object. Pokud neznám odpověď, ptám se. If I do not know the answer, I ask.

[LetitiateT]

Když nevím, zeptám se.
Nemůže být? Vím že to vypadá jako budoucí čas. Ale myslím že se to běžně používá i takhle. Jako - vždycky když nevím, tak se zeptám (stačí jednou) Ne?

[Janmunroe]

Ok, this is a little fuzzy for me. Why would Jestli not work here? Or pokud? Especially when "If" is called for vs "when"?

[VladaFu]

Pokud can be used here. It is like "when" when "when" means the same as "if". It is conditional.

Jestli cannot be used here, it is like "whether".