N4 — outside your level filter
Is said whole, with nothing composed onto it and takes no だ／です, so there are no forms to conjugate.
それなら
sorenarain that case, if soN4expression
Example sentences2
それなら、私が代わりに行くよ。
sorenara, watashi ga kawari ni iku yo.
In that case, I'll go instead. casual
それなら、明日もう一度相談しましょう。
sorenara, ashita mou ichido soudan shimashou.
In that case, let's discuss it again tomorrow. neutral