Future Tense
Irregular Stems but Regular Endings


The endings of verbs in the future tense are the same for all verbs bar one ("εἶμι = I'll go"), whether regular or irregular: The same as in the present tense. Which means that most are normal, uncontracted, but that some are contracted. When you learn a verb you have to learn the future form of that verb at the same time
For instance:
παιδεύω, παιδεύσω, regular stem, regular endings: -ω, -εις, -ει, -ομεν, -ετε, -ουσιν.
τιμάω, τιμήσω, regular lenghtened stem, regular endings
φέρω, οἰσω, irregular stem, regular endings
ὁράω, ὄψομαι, irregular stem, regular middle endings: -ομαι, -ει/ῃ, -εται, -όμεθα, -εσθε, -ονται
καλέω, καλῶ [ε], irregular, unlengthened stem, no sigma, regular ε-contract endings: -ῶ, -εῖς, -εῖ, -οῦμεν, -εῖτε, -οῦσιν
κομίζομαι, κομιοῦμαι [ε], regular ε-contract middle endings: -οῦμαι, -εῖ/ῇ, -ούμεθα, -εῖσθε, -οῦνται
ἐλαυνω, ἐλῶ [α], irregular stem, regular α-contract endings: -ῶ, -ᾶς, -ᾶ, -ῶμεν, -ᾶτε, -ῶσιν.
 
 Note 
In the future some active verbs have middle forms (while retaining their active meaning):
 today, normally, right now      tomorrow, in the future
  ἀκούω        ἀκούσομαι 
  βλέπω    βλέψομαι  (though βλέψω is also found)
  βοάω    βοήσομαι 
  διώκω    διώξομαι  (though διώξω is also found)
  θαυμάζω    θαυμάσομαι 
  φεύγω    φεύξομαι  (though φεύξω is also found)
  πλέω    πλεύσομαι 
  πνέω (I breathe; blow see 10b)   πνεύσομαι 
  βαίνω    βήσομαι 
  ἀναβαίνω    ἀναβήσομαι