A.T. Robertson Commentary Luke 22:42

"saying, Father, if thou be willing, remove this cup from me: nevertheless not my will, but thine, be done." — Luke 22:42 (ASV)

If thou be willing (ε βουλε). This condition is in the first petition at the start.

Be done (γινεσθω). Present middle imperative, keep on being done, the Father's will.