I struggle all the time with pronouns and their adjectival counterparts.
I need a grammatical commentary on each use of quid, quod, and qui in the following snippet from Cicero, De Oficiis:
. . . unum hoc animal sentit
quid sit ordo, quid sit, quod deceat, in factis dictisque qui modus.
Here are my best guesses.
quid sit ordo
quid here is interrogative pronoun, "what might be the order of things?" It is the subject of the clause and ordo is the predicate nominative.
quid sit
quid is again interrogative pronoun "what should be allowed?"
quod deceat
quod is interrogative adjective, with implied object "what (thing) would be fitting?"
qui modus
qui is again interrogative adjective, modifying modus, with an implied predicate, for example "what moderation may be"?
