This is ridiculous. I put "I still do not know how the teachers are testing me" and they said I was wrong and gave me a sentence that says the same thing but in a horrible way: "The teachers are testing me, I don't know yet how." ??
welcome to Duolingo :)
Seriously, this also happens all the time to me. However, I think you should report this, and see if they accept your sentence as correct, as well.
although noch=still and nicht=not, .... "noch nicht" go together to mean "not yet" so the correct answer should have "yet" somewhere
The teachers test me, I don't know yet how.
Why this version is not correct?
It sounds odd in English but it probably should be accepted. Just report it.
"I do know yet how" is wrong?
yes, it is. Note that the original sentence is negated.
Couldn't it be in English: "I don't know how the teachers are testing me yet"? That sounds better to me anyway, even though is suggests covert testing or maybe paranoia ;)