A.T. Robertson Commentary Titus 2:7

"in all things showing thyself an ensample of good works; in thy doctrine [showing] uncorruptness, gravity," — Titus 2:7 (ASV)

Shewing thyself (σεαυτον παρεχομενος). Present middle (redundant middle) participle of παρεχω with the reflexive pronoun σεαυτον as if the active voice παρεχων. The Koine shows an increasing number of such constructions (Robertson, Grammar, p. 811). See active in 1 Timothy 1:4.

An ensample (τυπον). For this word see 2 Thessalonians 3:9; Php 3:17.

Uncorruptness (αφθοριαν). Only example, from late adjective αφθορος (α privative and φθειρω).