乗るなら早くしろ。でなければ帰れ！
のるならはやくしろ。でなければかえれ！ (Noru nara hayaku shiro. De nakereba kaere!)
If you're going to pilot it, do it now. Otherwise, go home!
例文 1基本の例文
行くなら早く決めたほうがいい。でなければ、チケットが売り切れてしまう。
If you're going, you'd better decide soon. Otherwise, the tickets will sell out.
例文 2応用例
（試着室から出てこない兄に）買うなら早くしろ。でなければ帰るぞ！
(To my brother, who won't come out of the fitting room) "If you're going to buy it, hurry up. Otherwise, I'm going home!"
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