I planted (egw eputeusa). First aorist active indicative of old verb puteuw. This Paul did as Luke tells us in Acts 18:1-18 . Apollos watered (Apollw epotisen). Apollos irrigated the church there as is seen in Acts 18:24-19:1 . Another aorist tense as in verse 1 Corinthians 3:2 . But God gave the increase (alla o qeo huxanen). Imperfect tense here (active indicative) for the continuous blessing of God both on the work of Paul and Apollos, co-labourers with God in God's field (verse 1 Corinthians 9 ). Reports of revivals sometimes give the glory to the evangelist or to both evangelist and pastor. Paul gives it all to God. He and Apollos cooperated as successive pastors.