〜ておく
〜ておく means do in advance; leave as is. It is a JLPT N4 grammar point. Attach おく to the te-form to show that you do something in advance for later. It can also mean leaving a state as it is, and in conversation it may shorten to とく.
Japanese sources describe it as 「前もってする・そのままにする」.
〜ておく examples
旅行の前に切符を買っておく。
I will buy the ticket in advance before the trip.
明日のために部屋をそうじしておく。
I will clean the room in advance for tomorrow.
〜ておく exercises
Pick what belongs in the parentheses. The answer is marked below.
友だちが来る前に、お茶を買っ（ ）。
- ておく ✓
- てみる
- てある
- たらどう
I will buy tea in advance before my friend comes.
試験の前に、漢字を勉強し（ ）。
- てある
- ない方がいい
- ておく ✓
- なさい
I will study kanji in advance before the exam.
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