Practice JLPTHow to tell them apart
The core contrast is that と describes a natural, automatic, or habitual result that follows inevitably, while たら is a general conditional used for one-time events, requests, and situations where the speaker has volition or choice. With と, the main clause cannot express a command, request, or intention, so 嫌いだったら残して下さい is fine but 嫌いだと残して下さい is wrong. Both can describe past one-time results like 先生に聞くとすぐ分かった and 先生に聞いたら直ぐ分かった, but と carries a stronger sense that the result happened on its own.
- と Use と when the result follows naturally or automatically from the condition.
- たら Use たら for one-time events, requests, or actions with speaker volition.
と to
When/If (natural result)
A subordinate conjunction which marks a condition that brings about an uncontrollable event or state.
-
それは先生に聞くとすぐ分かった。
I understood it immediately when I asked my teacher.
-
タイヤは古いと危ないですよ。
Tires are dangerous if they are old.
たら tara
If/When
If; when; after | A subordinate conjunction which indicates that the action/state expressed by the main clause in a sentence takes place after the action/state expressed by the subordinate clause.
-
先生に聞いたら直ぐ分かった。
When I asked my teacher, I understood right away.
-
嫌いだったら残して下さい。
If you don't like it, please leave it.
と and たら are both JLPT N4 grammar points that Japanese learners often mix up. This page compares them side by side — meanings, usage and example sentences — so you can tell them apart.