I can't answer that question, Drift. Sparring him was the last action I performed before I was pulled from my world.

[He doesn't know why he does what he does in the future. There must be circumstances. Sentinel must not have learned.]

You wanted to, though, didn't you. You wanted to be able to make a difference somewhere.

[He sees your dissatisfaction, and he factors in the helplessness that Decepticons had felt--the action that had been so easy to spur in them because they needed something to do to better their lives.]