Negatives. The interpretation of negatives is different in Greek than English, as shown in this article analyzing μή in Acts 20:18–21.
Confirming Negatives in Acts 26:26. In Greek that when a negative adjective like οὐθέν is used with an adverbial negative like οὐ it preserves and follows the adverbial negative mood and is a confirming negative, not a double negative.
Postpositives are difficult to define, but the syntactical database provides tools to do it properly.
Matthew 4:24, The Swing Position and Proximal and Distal Dependents
John 17:24–25 Vocative πάτερ, Vocative ὁ πατήρ and Greek Grammar and Language Patterns as Text Selection Criteria