In this lesson, I will introduce you how to describe the situation which has been brought about by someone on purpose.

きょうしつ　の　でんき　が　つけてあります。

The light is on in the classroom.

きょうしつ　の　でんき　を　つけておきます。

I will turn the light on in the classroom.

テーブル　に　ごはん　が　のこしてあります。

There is the meal left on the table.

テーブル　に　ごはん　を　のこしておきます。

I will leave the meal on the table.

References:

Te-forms

https://anchor.fm/yuya-sato/episodes/Te-forms-enfaqj

There is X

https://anchor.fm/yuya-sato/episodes/There-is-X-en68s2

～ておく

https://anchor.fm/yuya-sato/episodes/ep-eps867

Transitive Verbs and Intransitive Verbs

https://anchor.fm/yuya-sato/episodes/Transitive-Verbs-and-Intransitive-Verbs-eqmp4e

Instagram:

https://www.instagram.com/yuyaman1986