Phil. 1:9 And this I pray proseuchomai (present tense, middle voice, participle mood), that your love may abound yet more and more in knowledge and [in] all judgment;

Phil. 4:6 Be careful for nothing; but in every thing by prayer proseuche (verbal noun) and supplication with thanksgiving let your requests be made known unto God.

Col. 1:3 We give thanks to God and Father of our Lord Jesus Christ, praying proseuchomai (present tense, middle voice, participle mood), always for you,

Col. 1:9 For this cause we also, since day we heard [it], do not cease to pray proseuchomai (present tense, middle voice, participle mood) for you, and to desire that ye might be filled with knowledge of his will in all wisdom and spiritual understanding;

Col. 4:2 Continue proskartereo (present tense, middle voice, imperative mood) in prayer proseuche, and watch in same with thanksgiving;

Here mood of verb “continue” changed from participle to imperative. The imperative mood corresponds to English imperative, and expresses a command to hearer to perform a certain action by order and authority of one commanding.

The Apostle by virtue of God breathed Word is commanding Colossians to actively pray with thanksgiving.

Col. 4:3 Withal praying proseuchomai (present tense, middle voice, participle mood), also for us, that God would open unto us a door of utterance, to speak mystery of Christ, for which I am also in bonds:

Col. 4:12 Epaphras, who is [one] of you, a servant of Christ, saluteth you, always labouring fervently for you in prayers proseuche, (verbal noun) that ye may stand perfect and complete in all will of God.

Lastly I would like to share with you a verse that uses another Greek word, dessis for English word prayer.

Phil. 1:19 For I know that this shall turn to my salvation through your prayer deesis, and supply of Spirit of Jesus Christ,

Dessis has its roots in word deomai which is a verb and guess what characteristics of this verb are; you got it, present tense, middle voice, participle mood. Is Word of God incredible or what?

So when it comes to prayer and praying we see a theme; that is that pray is something we should do consistently and constantly.