A.T. Robertson Commentary Galatians 6:10

"So then, as we have opportunity, let us work that which is good toward all men, and especially toward them that are of the household of the faith." — Galatians 6:10 (ASV)

As we have opportunity (ως καιρον εχωμεν). Indefinite comparative clause (present subjunctive without αν). "As we have occasion at any time."

Let us work that which is good (εργαζωμεθα το αγαθον). Volitive present middle subjunctive of εργαζομα, "Let us keep on working the good deed."

Of the household of faith (τους οικειους της πιστεως). For the obvious reason that they belong to the same family with necessary responsibility.