You sure did, JM. I'm not sure why Hanson wrote this sentence with a present optative, but we might bring out its sense with something like "Unless you
would sacrifice a goat ..., you weren't being honored."
Here's an idea for you to think over, JM. There's a wonderful first-year Greek grammar available for you to download and print at
http://books.google.com/books?id=whMTAAAAYAAJ&printsec=frontcover&dq=James+Turney+Allen,+The+First+Year+of+Greek#v=onepage&q=&f=falseThe author, J.T. Allen, was a teacher who really undersood ancient Greek as a living, spoken language. The exercises and practice sentences he gives you are all from actual ancient Greek authors, so you can see how real Greek behaves — unlike the artificial and sometimes misleading sentences that Hanson gives you. The book also has excellent paradigms for all the declensions, conjugations, etc. On the whole, I think it would make learning Greek a lot more enjoyable for you.
If you can print yourself a copy, you can look through it lesson by lesson until you come to a lesson where most of the material is new to you. We could start there, and we'd all be "on the same page" when we're talking about the grammar.