immediately

未来の「時」を表す副詞節はこうやって作れ！when+SV,  till+SV, before+SV, after+SV, by the time+SV, as soon as+SV, the moment+SV, the instant+SV, immediately+SV 注意しろ！未来のことだが、動詞の時制は現在形だ！