Conditional 〜と: Natural, Automatic Results (Meaning + Examples)
The kind of "if" it is
The と conditional says that A always leads to B. When A happens, B follows naturally, automatically, every time — there's no choice or surprise about it. Think of it as cause and inevitable effect: not "if, maybe," but "if A, then B, guaranteed."
That reliability is why と is the go-to pattern for laws of nature, machine behavior, repeated habits, and street directions.
春になると、桜が咲く。
はるに なると、さくらが さく。
When spring comes, the cherry blossoms bloom.
A law of nature — it happens every year, automatically.
このボタンを押すと、ドアが開く。
この ボタンを おすと、ドアが あく。
When you press this button, the door opens.
How a machine works — same input, same result.
ヤッタンは疲れると、すぐ寝る。
ヤッタンは つかれると、すぐ ねる。
When Yattan gets tired, he goes right to sleep.
A habit — it happens reliably.
Building it — and the one rule that breaks it
Formation is easy: add と to the plain, non-past form of the word in clause A. Verbs use their dictionary form; adjectives and nouns connect as shown below.
| Word type | Pattern | Example |
|---|---|---|
| Verb (dictionary form) | 押す + と | 押すと (when you press) |
| Verb (negative) | 押さない + と | 押さないと (if you don't press) |
| い-adjective | 高い + と | 高いと (if it's expensive) |
| な-adjective | 静か + だと | 静かだと (if it's quiet) |
| Noun | 春 + だと | 春だと (if it's spring) |
Two things to watch in the form itself. First, と always attaches to the non-past form even when the overall sentence is about the past or something habitual — the verb before と never changes to past tense (食べると ✓, not 食べたと). Second, nouns and な-adjectives need だ: it's 学生だと and 暇だと, not 学生と (which would be the listing/quotation と).
The rule that actually trips people up, though, isn't about form — it's about what B is allowed to be. Because と describes an automatic result, clause B cannot be something the speaker chooses or asks for. So B must not be a request, command, invitation, or volitional ("let's / I'll") statement.
右に曲がると、まっすぐ行ってください。
みぎに まがると、まっすぐ いって ください。
(✗ Incorrect) Turn right and please go straight.
✗ ください is a request — と can't lead to one. Use 〜たら instead: 右に曲がったら、まっすぐ行ってください。
If your B clause ends in 〜てください, a command, 〜ましょう, or a "let's" idea, switch to 〜たら (or sometimes ば). Save と for results that just happen on their own.
と in the wild
Where と really shines is any chain where each step produces a guaranteed next state — which is exactly what a set of directions or operating instructions is:
この道をまっすぐ行くと、駅があります。
この みちを まっすぐ いくと、えきが あります。
If you go straight along this road, there's the station.
Classic directions — go straight and the station appears.
二つ目の角を右に曲がると、銀行が見えます。
ふたつめの かどを みぎに まがると、ぎんこうが みえます。
Turn right at the second corner and you'll see the bank.
Each step leads automatically to the next.
It's just as natural for habits, reliable reactions, and the plain facts of arithmetic — anything that simply happens the same way every time:
モチはお酒を飲むと、顔が赤くなる。
モチは おさけを のむと、かおが あかく なる。
When Mochi drinks alcohol, his face turns red.
A reliable, automatic reaction.
二に三を足すと、五になる。
にに さんを たすと、ごに なる。
Two plus three is five.
Math — an absolute, unchanging result.
For "becomes," と pairs naturally with なる, as in 春になると ("when it becomes spring").
と vs ば, たら, and なら
と is the most automatic and repeatable of the four conditionals, and the only one that flatly refuses a request in clause B. たら is the flexible all-rounder, ば leans hypothetical, and なら responds to a topic someone has raised. The moment B is something a person decides, reach for one of those instead. The four-way comparison maps the differences in full.
One last と to keep apart: this conditional と is not the noun-listing/quotation と in パンとたまご ("bread and eggs"). Same character, totally different job.
The short version
- 〜と = plain non-past form + と → an automatic, inevitable result: "whenever A, B."
- Perfect for nature, machines, habits, math, and directions.
- Clause B cannot be a request, command, invitation, or volitional statement — use 〜たら for those.
- The verb before と stays non-past; nouns and な-adjectives need だ.
- Not the same as the listing/quotation と.
Practice it
Choose the correct use of the 〜と conditional (and spot where it's not allowed).
＿＿＿に入れるのに最もよいものを選びなさい。
Choose the grammar pattern that best completes the sentence.
このボタンを＿＿＿、ドアが開く。
Frequently asked questions
What does the 〜と conditional mean?
It marks an automatic, inevitable result: 'whenever/if A, then B (always).' For example このボタンを押すと、ドアが開く ('press this button and the door opens'). It suits nature, machines, habits, and directions.
Why can't I use と with ください?
Because と describes a result that happens on its own, clause B can't be something you ask for or decide. ✗ 右に曲がると、行ってください is wrong. Use 〜たら: 右に曲がったら、行ってください.
How is と different from たら, ば, and なら?
と is for the most automatic, repeatable results and can't take a request in B. たら is the flexible all-rounder, ば is more hypothetical, and なら responds to a topic. See the comparison at /compare/to-ba-tara-nara.
Is this the same と as in パンとたまご?
No. That と lists nouns ('bread and eggs') or quotes speech. The conditional と attaches to a plain non-past verb or clause and means 'when/if.' Same character, different grammar.
Where Conditional 〜と fits
Shaky on this? Get these solid first
- Conditional 〜たら · N4 — 〜たら is Japanese's most flexible conditional: just add ら to the plain past. Learn the formation, the 'if/when' meaning, the discovery use, and how it beats ば/と for requests.
Don't confuse it with
- 〜になる / 〜くなる · N5 — なる means 'become.' Learn the three patterns: noun + に + なる, な-adjective + に + なる, and い-adjective (drop い) + く + なる, plus how なる differs from する.
- 〜とき · N5 — とき(時) means 'when' in Japanese: attach plain form + とき. Learn noun+の, な-adj+な, plain verbs, and the key 行くとき vs 行ったとき tense difference.
- と · N5 — The particle と joins nouns into a complete list ('A and B'), means 'with' someone, and pairs with 同じ/違う for comparisons. Learn how と differs from や.
Compared side by side
See how this pattern differs from the ones it's confused with:
More N4 grammar to explore
Keep going with related patterns at the same level:
- 〜はず — はず expresses a logical expectation based on reason: 来るはずだ ('should come'). Learn how it attaches to plain forms, plus はずがない ('can't possibly') and はずだった ('was supposed to').
- 〜みたい — 〜みたい is the casual way to say something 'seems' or 'looks like.' Learn its two jobs — conjecture and likeness — plus the easy attachment rules and みたいに/みたいな.
- 〜らしい — らしい has two jobs: hearsay/inference from solid info ('apparently it'll rain') and a 'typical of / -like' suffix (男らしい = manly). Learn formation and how it differs from そうだ and ようだ.
- 〜そうだ — 〜そうだ after a plain-form clause means 'I hear that…' — reporting information you got from someone else. Learn the formation, the によると pairing, and how it differs from looks-like そう.
- 〜そう — 〜そう describes how things look or seem: おいしそう (looks tasty), 雨が降りそう (looks like rain). Learn the い/な-adjective and verb forms, よさそう・なさそう, and how it differs from hearsay そうだ.
- 〜ようだ — 〜ようだ states a conjecture from your own evidence ('it seems') and, as 〜ように / 〜ような, draws comparisons ('like'). Learn the attachment rules and how it differs from みたい and らしい.