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JLPT N4 · Verb forms

ておく (te oku)

~ておく — “do ~ in advance”

In short · Attach おく to the te-form to do something ahead of time for later. It also means leaving something as it is.
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Pattern

  • 動詞て形+おく Verb te-form + おく (買っておく)

How to use it

Use it for preparing so you are not in trouble later: 旅行の前に切符を買っておく. Past: ~ておいた.

Spoken style

In casual speech ~ておく contracts to ~とく (買っとく). It can also mean leaving a state as is, as in 窓を開けておく.

Examples

  • 旅行(りょこう)の前(まえ)に切符(きっぷ)を買(か)っておきます。

    Ryokō no mae ni kippu o katte okimasu.

    I'll buy the tickets in advance before the trip.

  • 客(きゃく)が来(く)る前(まえ)に部屋(へや)を掃除(そうじ)しておきます。

    Kyaku ga kuru mae ni heya o sōji shite okimasu.

    I'll clean the room in advance before the guests come.

  • 会議(かいぎ)の資料(しりょう)を先(さき)にコピーしておいた。

    Kaigi no shiryō o saki ni kopī shite oita.

    I made copies of the meeting materials beforehand.

Common mistakes

  • Do not confuse it with state ている.
  • It is for deliberate preparation, so use it with volitional verbs.

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