In the English Grammar Profile, C2 point 131 in CLAUSES/subordinated is defined as: non-finite clauses after subordinating conjunctions ‘(although, though)’, to express contrast. … although married, my mother decided not to leave… Although committed to her job she successfully maintains her social contacts… Jack, though disappointed, respects the result. The EGP examples above, use Past Participles, but the definition above does not mention them as being critical to this as a C2 structure. *The tagging might make mistakes