When / Whenever

to

TypeConjunctive
JLPT Leveln4

Summary

A conditional particle meaning 'when/whenever' that indicates automatic, natural consequences.

Usage Rules

  • Natural consequence: whenever A happens, B happens
  • Used with verbs in plain present tense
  • Not used for hypothetical situations
  • Not used for requests, commands, or volition in main clause
  • Common in proverbs and fixed patterns
  • 〜と = if (for inevitable results)

Example Sentences

はるになるとさくらがさく。

When spring comes, cherry blossoms bloom.

右にまがるとえきがあります。

When you turn right, there's the station.

ボタンをおすと出ます。

If you push the button, it comes out.

食べすぎるとふとる。

If you eat too much, you get fat.

ドアをあけるとねこがいた。

When I opened the door, there was a cat.

Common Mistake

Using と with commands, requests, or volition (と requires natural consequence, not human will).

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