en_tn/mat/26/40.md

he said to Peter, "What, could you not watch

Jesus is speaking to Peter, but the "you" is plural, referring to Peter, James, and John. (See: rc://en/ta/man/translate/figs-you)

What, could you not watch with me for one hour?

Jesus uses a question to scold Peter, James, and John. AT: "I am disappointed that you could not stay awake with me for one hour!" (See: rc://en/ta/man/translate/figs-rquestion)