>>> a) "Erg ass tra a fecht sa," ol in ben, "nachas fogluaisit
>>> do oic," ol si.
> The subjunctive takes "ní" as negative particle in principal clauses.
> The negative "ná" is used in principal clauses with imperatives.
> Therefore "foglúaiset" (non-palatalised "t"!) must be imperative.
Is "nacha(s)..." necessarily a principal clause? It feels like
a "so that (not)" relative clause. I admit I'm not very well
schooled in "clause" terminology, so perhaps I misunderstand here.
But at least I can take solace in the fact that I am not alone in
clausal confusion, to judge from the "Definitions of Clause" page