en_tn/rev/11/17.md

you, Lord God Almighty, the one who is and who was

These phrases can be stated as sentences. Alternate translation: "you, Lord God, the ruler over all. You are the one who is, and you are the one who was" (See: rc://en/ta/man/translate/figs-distinguish)

the one who is

"the one who exists" or "the one who lives"

who was

"who has always existed" or "who has always lived"

you have taken your great power

What God did with his great power can be stated clearly. Alternate translation: "you have defeated with your power everyone who has rebelled against you" (See: rc://en/ta/man/translate/figs-explicit)