I had thought that I should have a go at some Greek exegesis on this blog, seeing as I am putting so much effort into learning the language. However, when I looked at my chosen verse (John 8:58) I struggled.
So here is the meaning of ουκ (ouk) which Terry Pratchett fans will know is very similar to the only word used by the librarian of the university in Ankh-Morpork - ook. I can't read Greek text without being reminded of this librarian because the word occurs quite often. As something of an anticlimax, it simply means 'not'.
In the meantime I will wrestle my limited Greek into submission and try to parse γενεσθαι in order to translate my chosen verse.