GrammarJLPT N5
→ if / when
と – Conditional 'If / When' (Natural or Automatic Results)
JLPT N5ParticleNeutral
The particle と, when used as a conditional, expresses situations where one event naturally, automatically, or inevitably leads to another. It is used for general truths, habitual outcomes, natural consequences, and instructions (such as directions). Unlike たら or ば, which can express hypothetical or one-time conditions, と strongly implies that whenever condition A occurs, result B always or naturally follows. Because of this automatic-result nuance, と is generally not used when the result clause expresses the speaker's volition, request, or suggestion — you would not typically follow と with commands, invitations, or intentions. The structure is straightforward: attach と directly to the plain (dictionary or nai) form of a verb, adjective, or noun + copula. This conditional と is extremely common in everyday Japanese for describing how things work, giving directions, and stating scientific or natural facts.
Functions
#1 Natural or scientific consequence
Structure
Verb (dictionary form) + と + Result
春になると、花が咲きます。
Here と describes a natural, inevitable consequence: every time spring arrives, flowers bloom. This is a general truth that happens automatically and repeatedly, which is the most typical use of the conditional と. The speaker is not expressing a wish or hypothesis but simply stating how nature works.When spring comes, flowers bloom.
Structures
- Verb (plain form)
- Verb (dictionary / nai form) + と + Result clause
- い-Adjective
- い-Adjective + と + Result clause
- な-Adjective / Noun
- な-Adjective / Noun + だ + と + Result clause
Common mistakes
A very common mistake is using と when the result clause contains a command, request, invitation, or expression of the speaker's will (e.g., してください, しましょう, したい). Since と implies an automatic or natural result, pairing it with volitional expressions sounds unnatural — use たら or ば instead in those cases. Another frequent error is confusing と with とき (when); while both can translate as 'when,' と emphasizes an automatic consequence, whereas とき simply marks a point in time. Learners also sometimes mistakenly use the ます-form before と; remember that the conditional と always attaches to the plain form (dictionary form or ない form), never to the polite form. Finally, some learners overuse と for one-time past events (e.g., 'When I opened the window, a bird flew in'), where たら is generally more appropriate unless the speaker is narrating a sequence of discovered results.
Related
たらばならとき場合は