ておく
(Te oku)
Doing something in advance or leaving it in a certain state.
Connection rules
- +Verb (te-form) + おく
- +Casual: Verb (te-form, drop て) + とく
Examples
1.
明日までに資料を読んでおきます。

Ashita made ni shiryou wo yon de oki masu.
I will read the materials by tomorrow.
「Preparing for meeting」
2.
お米を洗っとくから、待ってて。

O kome wo ara toku kara, ma te te.
I'll wash the rice in advance, so wait.
「Cooking dinner preparation」
Practice
I have already reserved a restaurant for the party.
パーティーのために、もうレストランを___。
Romaji also accepted