The sentence is:
"illa monebat talia (mē duplicēs occuluēre forēs)"
So the first part I'm pretty sure I've got correct. I have it as:
"that distinguished witch (antecedant is Dipsas) warned me"
However for the next part I'm really lost, "dedeces" is a subjunctive second person present active plural verb, but then the notes say that "occuluere" is an indicative third person perfect active plural verb. I'm not sure what to do with these, and I can't really make sense of why "dedeces" is subjunctive. My best guess would be something like:
"The doors you would double have hidden me"
But that treats "fores" as both subject and accusative, which I guess is not unheard of, and also is kind of a cop out regarding the subjunctive mood here.
Any help wold be greatly appreciated.