to do something in advance
not to do something for future
te-form of verb
~ないで
+
おく
パーティーの前に、飲み物を買っておきます。Before the party, I will
buy drinks (in advance).
今晩、すし屋へ行くので、何も食べないでおきます。I
am going to a Sushi restaurant tonight, so I am not eating anything (in
preparation).
