Gospel Guidebook: Getting and Keeping It Right 
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Articles on the Greek Verb
Misunderstandings about the Greek Present Tense
Greek Verb Tense: Time, Kind of Action, and Bad Scholarship
Independent Adjectival Participles (Substantives) and Verbal Aspect
John 20:31 Purpose Statement and Aorist Subjunctive
The Significance of John 3:18 as Proof of Punctiliar Believing
Translation of the Greek Present Indicative in 1 Corinthians 15:2
Other Articles
Greek Textbooks and Grammars
Essentials of New Testament Greek by Ray Summers
Learn to Read New Testament Greek by David Alan Black
A Greek Grammar For Colleges by Herbert Weir Smyth
The Basics of New Testament Greek Syntax by Daniel Wallace
The Greek Testament Commentary by Henry Alford
Word Pictures in the New Testament by A.T. Robertson