A Short Grammar of Classical Greek: Part II: Inflection: VI. Conjugation: B. Second Conjugation: Verbs in -μι.

1. Verbs in -μι with reduplication in the present stem

The Paradigms of the four verbs:

• τίθημι — put; present stems τιθη-, τιθε-; verb stems θη-, θε-.
• ἵημι — send; present stems ἱη-, ἱε-; verb stems ἡ-, ἑ-.
• δίδωμι — give; present stems διδω-, διδο-; verb stems δω-, δο-.
• ἵστημι — place, set; present stems ἱστη-, ἱστα-; verb stems στη-, στα-.

Note 1. — Occasional secondary forms are the indicative forms τιθεῖς, τιθεῖ — ἱεῖς, ἱεῖ — and the plural forms with -κα: ἔθηκαν, ἐδώκαμεν (99, 3).

Note 2. — σ in ‑σαι and ‑σο remains in the present and impf. (except subj.); hence τίθεσαι, ἐτίθεσο, τίθεσο — δίδοσαι, ἐδίδοσο, δίδοσο.

Note 3. — Rare collat. forms are optatives with οι: τίθοιτο, συνθοῖτο, etc., and subjunctives / optatives with irregular accentuation: τίθηται, πρόσθηται, opt.), but ι disappears in all forms of the aorist except in the indicative εἷσο. δίδοσο — but ἔθου, θοῦ — οὗ — ἔδου, δοῦ. ἐπιθοίμεθα, συνεπιθοῖντο, ἐφιοῖμεν, παριοῖτε, προσιοῖεν, προοῖτο, προοῖντο. πρόηται, ἐπίθωνται, τίθοιτο, σύνθοιτο, πρόοιντο, ἀφίοιεν (against 99, 4).