An Act Of Courage

nominative singular – lion.

masculine genitive plural of – his own (as in Latin, supplying people is a very common idiom).

present participle of – I am, hence being, but very common as idiom for is/was.

I am grateful for the erudition of Dr John Taylor, head of classics at Tonbridge, author of Greek to GCSE (Bristol Classical Press/Duckworth) and New Testament Greek: A Reader (Cambridge University Press).