[Grammar pattern] V(て) + とく: Meaning and Example Sentences

A grammar pattern used to convey the idea of doing a certain action in advance or keeping the current state without doing anything for a specific purpose in the future.
It is a short form of the pattern "V(て) + ておく" and is often used in casual conversations.

明(あ)日(した)のパーティーの飲(の)み物(もの)、私(わたし)が買(か)っとくよ。ーありがとう。お願(ねが)い。

I’ll get the drinks for tomorrow’s party. — Thanks, I appreciate it.
デートの前(まえ)に、レストランを予(よ)約(やく)しといた。

I made a reservation at the restaurant before the date.
買(か)ってきたビールはどこ？ー冷(れい)蔵(ぞう)庫(こ)に入(い)れといたよ。

Where is the beer I bought? – I put it in the fridge.
机(つくえ)の上(うえ)の紙(かみ)は、片(かた)付(づ)けないでそのままにしといて。ーはい、わかりました。

Please don’t clean up the paper on the desk, just leave it as it is. - Okay, I understand.
来(らい)月(げつ)のテストのために、漢(かん)字(じ)を復(ふく)習(しゅう)しとかないと。

I need to review the kanji for next month’s test.