getting better....what do these mean?
Last question I answer, since I’ve answered several of yours now without getting an answer to my original question and my time is limited.
Aorist subjunctive active = potential action (hence the “might” in the English translation).
Perfect indicative middle/passive = present state resulting from completed action (hence the English rendering as “are forgiven”/”are retained”).
When these verb forms are combined together in this context, together they refer to a potential action resulting in a completed state—i.e., if the apostles might do X (forgive/retain sins), Y is the resulting completed state (sins in a state of being forgiven/retained).