How to tell them apart
The core split is about control and timing. と describes an automatic, unavoidable result, so it cannot be used for commands, requests, or volitional main clauses. ば states a general conditional and is also weak for commands. たら is the most flexible: it works for one-time events, discovery, and commands. なら takes an already-raised or supposed situation as its topic and comments on it, so it feels like 'given that X, then Y' rather than a temporal sequence.
- たら Use たら for one-time if/when events, including commands, requests, and discoveries.
- ば Use ば for general conditional statements, especially recurring or hypothetical if-then patterns.
- と Use と when the result happens automatically or naturally, with no speaker control over the outcome.
- なら Use なら when you accept someone's stated plan or situation as a given and then give advice or a conclusion.
| Grammar point | Meaning | JLPT level |
|---|---|---|
| たら tara | used for 'if' or 'when' conditions | N4 |
| ば ba | if; conditional marker | N4 |
| と to | if/when something happens, leading to an expected outcome | N4 |
| なら nara | conditional 'if' | N4 |
たら tara
used for 'if' or 'when' conditions
たら marks an if or when condition where the main event follows realization of the condition, and it covers likely future cases, hypothetical wishes, and past counterfactuals. Attach ら to the plain past form, as in 行ったら, 高かったら, and 静かだったら or 学生だったら for na-adjectives and nouns. It is neutral and very common in speech, but remember to use the た form even for future meaning, never the dictionary form before ら.
-
行きたいんだったら、行ってもいいよ。
You can go if you want to.
-
後２分早かったら、バスに乗れたのに。
If you had come only two minutes earlier, you could have caught the bus.
ば ba
if; conditional marker
ば marks an if condition that leads to a result, advice, or hypothetical outcome. For verbs, change the verb to its potential-like e-stem form and add ば, as in 行けば, 食べれば, or すれば. For i-adjectives use ければ, as in 高ければ, and for nouns and na-adjectives use であれば or ならば, as in 学生であれば. It is neutral in style and common for general truths and suggestions like すればいいですか.
-
もうちょっとでもお金があれば買ったのに。
If only I had just a little more money, I'd have bought it.
-
何時にチェックインすればいいですか。
What time should I check in?
と to
if/when something happens, leading to an expected outcome
と expresses that whenever the condition before it happens, the result after it follows naturally or inevitably, like a rule of nature, a machine function, or a habitual outcome. It attaches to the plain non-past form of verbs and i-adjectives, as in 押すと or 安いと, and to nouns and na-adjectives with だと, as in 春だと. The result clause cannot contain a command, request, or intention such as てください or ましょう, since the outcome must be beyond the speaker's control.
-
三に二を足すと五になる。
Add two to three, and you get five.
-
冬が来ると、とても寒くなりますね。
When winter comes, it'll become really cold, right?
なら nara
conditional 'if'
なら sets up an if condition based on something already mentioned or assumed by the speaker, often with a nuance of if it is the case that. It attaches to nouns and na-adjective stems as Noun + なら, to i-adjectives and verbs in plain form as 行くなら or 寒いなら, and to past forms for past conditions. It is common in conversation for suggestions and offers, and the main clause often expresses a decision, request, or judgment about that condition.
-
雨なら、家で映画を見ます。
If it's raining, I'll watch a movie at home.
-
暇なら、手伝ってください。
If you're free, please help me.
たら and ば and と and なら are both JLPT N4 grammar points that Japanese learners often mix up. This page compares all 4 side by side on meanings, usage and example sentences, so you can tell them apart.