G4828–συμμαρτυρέω–summartureō

who do shew the work of the law written in their hearts, their conscience also witnessing with them, and between one another the thoughts accusing or else defending,

συμμαρτυρούσης summarturousēs “are bearing witness”

The Spirit himself doth testify with our spirit, that we are children of God;

συμμαρτυρεῖ summarturei “bears witness with”

Truth I say in Christ, I lie not, my conscience bearing testimony with me in the Holy Spirit,

συμμαρτυρούσης summarturousēs “while is bearing witness”