それなら

JLPT Level: N2
Meanings

Then

If that’s the case

In that situation

If so

Usage

それなら + (sentence)

Explanation
A conjunctive expression used to respond to a previously stated situation or condition. It signals that the speaker is transitioning to a plan, decision, or conclusion based on what has just been said. It can be compared to "in that case" or "then" in English. It’s commonly used in everyday conversation, informal to polite contexts, and is often followed by a suggestion, decision, or action.
それなら私がやります。
それならわたしがやります。

If that’s the case, I’ll do it.

それなら別の方法を試そう。
それならべつのほうほうをためそう。

Then let’s try another method.

それなら話は早い。
それなら はなしは はやい。

In that case, it’s a straightforward matter.