N4 grammar

〜ことにする

kotonisuru

Deciding to

Formation

ことにする reports a decision you made yourself. In the past tense it announces what you settled on, and in the ている form it describes a rule you have adopted. The choice is yours, which is the whole difference from ことになる.

Examples

〜ことにする is marked in each sentence. Tap any word for its dictionary entry.

  1. I've decided to jog every morning.

  2. He makes it a rule to read aloud every day.

  3. My mother objected to my going to the Middle East.

  4. Judy decided to wear her new bikini.

  5. You'd better mind your own business.

The explanation is ours, written for this site. Example sentences from Tatoeba (CC BY 2.0 FR), each machine-checked to actually contain the pattern. Furigana is generated automatically, so a rare reading may be imperfect.