条件表現N4
〜なら
if... (topic-based condition)
Structure
N / V-辞書形 + なら
Explanation
Noun/dictionary form + なら expresses: ① responding to what the other person mentioned, "if it's..."; ② a hypothetical condition. Unlike たら, なら often takes up the listener's topic (行くなら、私も行く).
Examples
京都に行くなら、秋が一番いいですよ。
If you go to Kyoto, autumn is the best time.
安いなら、買います。
If it's cheap, I'll buy it.
Note
なら often responds to the listener's topic with advice or judgment. Compared with たら and ば, the premise of なら is usually known information, and the result can be volitional.