News of Koine and Biblical Greek

Hello!

I'm using a Bible program to read the Bible in greek. It is the e-sword:
http://www.e-sword.net

The greek text has some letters showing what kind of word is there... Like V-PPI-3S. I imagine that this means that the word is a verb in present passiv indicative, third person singular... I want to know if there is a table of the meanings of all these codes...

But the main question is about Heb 9:23. There ...

Could some one give me a straight answer to whether these references are correct representations of tenses?




:

"The perfect tense expresses perfective action. Perfective action involves a present state which has resulted from a past action. The present state is a continuing state; the past action is a completed action.

Intensive Perfect

Remember ...

I) "WHOEVER BELIEVES" IS A NOMINATIVE PRESENT PARTICIPLE PORTRAYING A SINGLE MOMENT OF BELIEVING AND NOT A CONTINUOUS ONE

A) "PAS HO PISTEUON" = "WHOEVER BELIEVES" IS A NOMINATIVE PRESENT PARTICIPLE = A NOUN WHICH ONLY REQUIRES AN INSTANT OF BELIEVING

The phrase "whoever believes" in Jn 3:16 = "pas ho pisteuon" = relative pronoun "pas" = "everyone who" with a definite article "the" = "ho" + the present participle verb functioning as a noun, ...

I have question I just got done reading this excerpt from Dr. Dan Wallace's Greek Grammar Beyond the Basics and wanted to get a second opinion so to speak on whether his conclusions are spot on.



The aspectual force of the present pisteuon seems to be in contrast with ho pisteusas. The aorist is used only eight times (plus two in the longer ending of Mark). Thus, it seems that since the aorist participle was ...

Mark 1:21 reads in part, ...και ευθυς τοις σαββασιν εισελθων....
σαββατον, being second declension, would seem to me to be declined as follows: σαββατο(the root) + ις(plural,dative,neuter) giving σαββατοις. Instead it looks like third declension using σιν(plural,dative,neuter). What am I missing?
Thanks for any help.