By the way, a thought on Porter’s definition of the Future form:

“Rather than temporal values, the future form grammaticalizes the semantic (meaning) feature of expectation.”
Stanley E. Porter, Idioms of the Greek New Testament (Sheffield: JSOT, 1999), 44.

Exactly how in the world is that different than what we understand as future meaning. Can we do anything more than expect an event in the future? The fact that I say “I will eat dinner tomorrow” does not make the English future anything more than an expectation. I fail to see how his definition, other than being wordy, is any better than simply using the word “future.”

Oh, right. Porter is working as hard as he possibly can to avoid the use of temporal language because he doesn’t want there to be temporality in the Greek verbal system.