A decree concerning relations with Aphytis, a city in Chalkidike. 426/5 B.C. The decree was later re-used in the Byzantine period as threshold for a door. Athenian Agora Excavations. Key Terms and Concepts FORMATION OF FUTURE TENSE STEM PRINCIPAL PARTS OF A VERB Chapter Navigation Key Terms and Concepts The Future Tense Principal Parts Exercises 15 Biblical Readings 15 Book Nav Classical Readings 14.2 The Future Tense