"He is not willing to cooperate."
"qang" means "willing to", but isn't jI the prefix for "I" - "I am not willing to". And in the Klingon dictionary, the word cooperate is given as "yeq" in Klingon, so wouldn't the correct answer be something like "yeqqangbe' ghaH"? I also saw a couple of other examples in the initial questions about cooperating that had the "jIqang" formulation.
Just to confirm, the consensus here (according to TKD, at least) is that jij is a stative verb meaning "to be cooperative," whereas yeq is a full-on verb meaning "to cooperate," correct?
And if someone is to cooperate with someone else, how is that second entity treated in Klingon? Are they expressed as a direct object, e.g., tera'nganpu' yeq mara, or does there need to be some kind of prepositional suffix on tera'nganpu'?
And if someone is to cooperate with someone else, how is that second entity treated in Klingon?
In that case, the two are cooperating. They are both the subject of the verb.
yeq tera'nganpu' mara je "The Terrans and Mara are cooperating (i.e. with each other)".