Correct word order

[TheDutchboy]

I completely disagree with my english book.
So that's why I'd like to ask you this.
I learn that you should say this: I don't still know...(rest of the sentence)
But that doesn't make any sense at all.
I think this is correct: I still don't know...(rest of the sentence)

Which of them is correct?

I am sorry for my (probably) bad english.
I am dutch and like I already said, I don't learn good english.
The sentence is one I use in an E-Mail I have to make for english homework and of course every sentence can be used instead of this one.

[Josef]

The correct form is:

I still don't know...(rest of the sentence)

[TheDutchboy]

Thank you very much Josef.
Are you able to tell me why I learn wrong english?
Or aren't you?

[Tukanja]

Sometimes I'd say

I don't know, still.

Also,in some other situations

xxx, still, I am not sure I know.

[Andersan]

I am dutch and like I already said, I don't learn good english.