N3decisionvolition
～ことにする (koto ni suru) - Decide to
[Verb dictionary form] + ことにする
Quick answer
[Verb dictionary form] + ことにする means "Decide to do something". This N3 pattern appears often in everyday conversation. Examples and practice exercises are listed below.
Meaning
Decide to do something
Explanation
Expresses a decision or determination made by the speaker.
Examples
タバコをやめることにした。
タバコをやめることにした。
I decided to quit smoking.
Practice this grammar
[Verb dictionary form] + ことにする
Which sentence correctly uses "～ことにする (koto ni suru) - Decide to"?
Vocabulary from these examples
Last updated Jul 4, 2026